TWI693427B - Optical lens assembly - Google Patents

Abstract

An optical lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is with positive refractive power. The second lens is with negative refractive power. The third lens is with negative refractive power. The fourth lens is with refractive power and includes a concave surface facing a projection side. The fifth lens is with positive refractive power. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from the projection side to an image source side along an optical axis. The optical lens assembly satisfies: -2.10

f₂/f

-1.38; wherein f is an effective focal length of the optical lens assembly and f₂ is an effective focal length of the second lens.

Description

Optical lens (2)

The invention relates to an optical lens.

The current development trend of optical lenses used in projectors, in addition to the continuous development of miniaturization, with different application requirements, the need for high resolution and large aperture capabilities, the conventional optical lenses can no longer meet today's needs In order to meet the demands of miniaturization, high resolution and large aperture at the same time, another optical lens with a new architecture is required.

In view of this, the main purpose of the present invention is to provide an optical lens with a shorter overall lens length, a higher resolution, and a smaller aperture value, but still having good optical performance.

f₂/f

-1.38；其中，f為光學鏡頭之一有效焦距，f₂為第二透鏡之一焦距。 The optical lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens has positive refractive power. The second lens has negative refractive power. The third lens has negative refractive power. The fourth lens has refractive power and includes a concave surface facing a projection side. The fifth lens has positive refractive power. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in sequence along an optical axis from the projection side to an image source side. The optical lens meets the following conditions:-2.10

f ₂ /f

-1.38; where f is one of the effective focal lengths of the optical lens and f ₂ is one of the focal lengths of the second lens.

The first lens includes a convex surface facing the projection side and a concave surface facing the image source side, the second lens includes a convex surface facing the projection side and a concave surface facing the image source side, and the third lens package Including a concave surface facing the projection side and another concave surface facing the image source side, the fourth lens has positive refractive power and may further include a convex surface facing the image source side, and the fifth lens includes a convex surface facing the projection side and a plane facing the image source side.

The first lens includes a convex surface facing the projection side and a concave surface facing the image source side, the second lens includes a convex surface facing the projection side and a concave surface facing the image source side, and the third lens includes a concave surface facing the projection side and another concave surface facing the image On the source side, the fourth lens has positive refractive power and may further include a convex surface facing the image source side, and the fifth lens includes a convex surface facing the projection side and a convex surface facing the image source side.

|f₃+f₅|

7.5mm；其中，f₃為第三透鏡之一焦距，f₅為第五透鏡之一焦距。 The optical lens meets the following conditions: 3.6mm

|f ₃ +f ₅ |

7.5mm; where, f ₃ is the focal length of one of the third lenses, and f ₅ is the focal length of one of the fifth lenses.

T₁₅/IMGH

3.7；其中，T₁₅為第一透鏡之一投影側面至第五透鏡之一影像源側面於光軸上之一間距，IMGH為光學鏡頭之一像高的一半。 The optical lens meets the following conditions: 2.7

T ₁₅ /IMGH

3.7; where, T ₁₅ is a distance between the projection side of the first lens and the image source side of the fifth lens on the optical axis, and IMGH is half of the image height of the optical lens.

f₂/f₃

6；其中，f₂為第二透鏡之一焦距，f₃為第三透鏡之一焦距。 The optical lens meets the following conditions: 2.8

f ₂ /f ₃

6; where, f ₂ is the focal length of one of the second lenses, and f ₃ is the focal length of one of the third lenses.

f₂+f₄

-2.5mm；其中，f₂為第二透鏡之一焦距，f₄為第四透鏡之一焦距。 The optical lens meets the following conditions: -13.6mm

f ₂ +f ₄

-2.5mm; where f ₂ is the focal length of one of the second lenses, and f ₄ is the focal length of one of the fourth lenses.

|f₂/f₄|

3；其中，f₂為第二透鏡之一焦距，f₄為第四透鏡之一焦距。 The optical lens meets the following conditions: 1.5

|f ₂ /f ₄ |

3; where, f ₂ is the focal length of one of the second lenses, and f ₄ is the focal length of one of the fourth lenses.

T_STL1/F#

1.68mm或 0.32

T_5IMG/TTL

0.41；其中，T_STL1為光圈至第一透鏡之一投影側面於光軸上之一間距，F#為光學鏡頭之一光圈值，T_5IMG為第五透鏡之一影像源側面至一影像源於光軸上之一等效空氣間距，TTL為光學鏡頭的鏡頭總長。 The optical lens of the present invention may further include an aperture disposed between the projection side and the first lens, wherein the optical lens satisfies the following conditions: 0.38mm

T _STL1 /F#

1.68mm or 0.32

T _5IMG /TTL

0.41; where, T _STL1 is the _distance between the aperture and the projection side of the first lens on the optical axis, F# is the aperture value of the optical lens, and T _5IMG is the image source side of the fifth lens to an image source from light One equivalent air gap on the axis, TTL is the total lens length of the optical lens.

In order to make the above objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

1, 2, 3, 4, 5, 6, 7‧‧‧ optical lens

L11, L21, L31, L41, L51, L61, L71

L12, L22, L32, L41, L52, L62, L72

L13, L23, L33, L43, L53, L63, L73

L14, L24, L34, L44, L54, L64, L74

L15, L25, L35, L45, L55, L65, L75: fifth lens

ST1, ST2, ST3, ST4, ST5, ST6, ST7: aperture

P1, P2, P3, P4, P5, P6, P7: 珜鏡

PG1, PG2, PG3, PG4, PG5, PG6, PG7: protective glass

OA1, OA2, OA3, OA4, OA5, OA6, OA7: optical axis

IS1, IS2, IS3, IS4, IS5, IS6, IS7: image source

S11, S21, S31, S41, S51, S61, S71: aperture surface

S12, S22, S32, S42, S52, S62, S72: projection surface

S13, S23, S33, S43, S53, S63, S73: the first lens object side

S14, S24, S34, S44, S54, S64, S74: first lens image side

S15, S25, S35, S45, S55, S65, S75: second lens object side

S16, S26, S36, S46, S56, S66, S76: second lens image side

S17, S27, S37, S47, S57, S67, S77: third lens object side

S18, S28, S38, S48, S58, S68, S78: third lens image side

S19, S29, S39, S49, S59, S69, S79: fourth lens object side

S110, S210, S310, S410, S510, S610, S710: fourth lens image side

S111, S211, S311, S411, S511, S611, S711: fifth lens object side

S112, S212, S312, S412, S512, S612, S712: fifth lens image side

S113, S213, S313, S413, S513, S613, S713: the side of the loess

S114, S214, S314, S414, S514, S614, S714: The side of the image

S115, S215, S315, S415, S515, S615, S715: protect the glass side

S116, S216, S316, S416, S516, S616, S716: protect the glass side

FIG. 1 is a schematic diagram of lens configuration and optical path according to an embodiment of the optical lens of the present invention.

FIG. 2A is a field curvature diagram of the optical lens of FIG. 1.

FIG. 2B is a distortion diagram of the optical lens of FIG. 1.

Figure 2C is the Lateral Color diagram of the optical lens of Figure 1.

FIG. 2D is a modulation transfer function diagram of the optical lens of FIG. 1.

FIG. 3 is a schematic diagram of a lens configuration and optical path according to another embodiment of the optical lens of the present invention.

Figure 4A is a field curvature diagram of the optical lens of Figure 3.

FIG. 4B is a distortion diagram of the optical lens of FIG. 3.

Figure 4C is a lateral chromatic aberration diagram of the optical lens of Figure 3.

FIG. 4D is a modulation conversion function diagram of the optical lens of FIG. 3.

FIG. 5 is a schematic diagram of lens arrangement and optical path according to still another embodiment of the optical lens of the present invention.

FIG. 6A is a field curvature diagram of the optical lens of FIG. 5.

FIG. 6B is a distortion diagram of the optical lens of FIG. 5.

Figure 6C is a lateral chromatic aberration diagram of the optical lens of Figure 5.

FIG. 6D is a modulation conversion function diagram of the optical lens of FIG. 5.

FIG. 7 is a schematic diagram of lens arrangement and optical path according to still another embodiment of the optical lens of the present invention.

FIG. 8A is a field curvature diagram of the optical lens of FIG. 7.

FIG. 8B is a distortion diagram of the optical lens of FIG. 7.

Figure 8C is a lateral chromatic aberration diagram of the optical lens of Figure 7.

FIG. 8D is a modulation conversion function diagram of the optical lens of FIG. 7.

FIG. 9 is a schematic diagram of lens configuration and optical path according to still another embodiment of the optical lens of the present invention.

FIG. 10A is a field curvature diagram of the optical lens of FIG. 9.

FIG. 10B is a distortion diagram of the optical lens of FIG. 9.

FIG. 10C is a lateral chromatic aberration diagram of the optical lens of FIG. 9.

FIG. 10D is a modulation conversion function diagram of the optical lens of FIG. 9.

FIG. 11 is a schematic diagram of lens configuration and optical path according to still another embodiment of the optical lens of the present invention.

FIG. 12A is a field curvature diagram of the optical lens of FIG. 11.

FIG. 12B is a distortion diagram of the optical lens of FIG. 11.

FIG. 12C is a lateral chromatic aberration diagram of the optical lens of FIG. 11.

FIG. 12D is a modulation conversion function diagram of the optical lens of FIG. 11.

FIG. 13 is a schematic diagram of lens configuration and optical path according to still another embodiment of the optical lens of the present invention Figure.

FIG. 14A is a field curvature diagram of the optical lens of FIG. 13.

Fig. 14B is a distortion diagram of the optical lens of Fig. 13;

FIG. 14C is a lateral chromatic aberration diagram of the optical lens of FIG. 13.

FIG. 14D is a modulation conversion function diagram of the optical lens of FIG. 13.

The invention provides an optical lens, comprising: a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the first lens, the second lens, the third lens and the fourth lens And the fifth lens is arranged in sequence along an optical axis from a projection side to an image source side.

According to one or more embodiments of the invention, the first lens has positive refractive power. The first lens is made of glass, for example. The projection side of the first lens may be, for example, a spherical surface, and the image source side may be, for example, a spherical surface.

According to one or more embodiments of the invention, the second lens has negative refractive power. The second lens is made of glass, for example. The projection side of the second lens may be, for example, a spherical surface, and the image source side may be, for example, a spherical surface.

According to one or more embodiments of the invention, the third lens has negative refractive power. The third lens can be made of glass, for example. The projection side of the third lens may be, for example, a spherical surface, and the image source side may be, for example, a spherical surface.

According to one or more embodiments of the present invention, the fourth lens includes a concave surface facing a projection side. The fourth lens can be made of glass, for example. The projection side of the fourth lens may be, for example, a spherical surface, and the image source side may be, for example, a spherical surface.

According to one or more embodiments of the invention, the fifth lens has positive refractive power. The fifth lens may be made of glass, for example. The projection side of the fifth lens may be, for example, a spherical surface, and the image source side may be, for example, a spherical surface.

According to one or more embodiments of the present invention, the optical lens may further include an aperture, and the aperture is disposed between the projection side and the first lens.

In addition, according to one or more embodiments of the present invention, the optical lens satisfies at least one of the following conditions:

Where f is the effective focal length of the optical lens, f ₂ is the focal length of the second lens, f ₃ is the focal length of the third lens, f ₄ is the focal length of the fourth lens, f ₅ is the focal length of the fifth lens, and T _5IMG is the first The equivalent air distance from the side of the five-lens image source to the image source on the optical axis, TTL is the total long distance of the lens of the optical lens (for example: the distance from the projection side of the aperture to the image source from the optical axis or TTL is the first A distance from the projection side of a lens to the image origin on the optical axis). T ₁₅ is the distance between the projection side of the first lens to the image source side of the fifth lens on the optical axis, IMGH is half the image height of an optical lens, T _STL1 is the aperture to the projection side of the first lens on the optical axis F# is the aperture value of the optical lens.

|f₃+f₅|

7.2mm或3.8mm

|f₃+f₅|

7.2mm或3.8mm

|f₃+f₅|

7.5mm或3.6mm

|f₃+f₅|

6.8mm或3.8mm

|f₃+f₅|

6.8mm或4.1mm

|f₃+f₅|

7.2mm或4.1mm

|f₃+f₅|

7.5mm則有較佳效果，若條件(1)修改為4.1mm

|f₃+f₅|

6.8mm則有更佳效果。又或者，若條件(1)修改為3.6mm

f₃+f₅

7.5mm或3.6mm

f₃+f₅

7.2mm或3.6mm

f₃+f₅

6.8mm或3.8mm

f₃+f₅

7.5mm或3.8mm

f₃+f₅

7.2mm或3.8mm

f₃+f₅

6.8mm或4.1mm

f₃+f₅

7.2mm或4.1mm

f₃+f₅

7.5mm則有較佳效果，若條件(1)修改為4.1mm

f₃+f₅

6.8mm則有更佳效果。 In one or more embodiments of the present invention, if the condition (1) is modified to 3.6mm

|f ₃ +f ₅ |

7.2mm or 3.8mm

|f ₃ +f ₅ |

7.2mm or 3.8mm

|f ₃ +f ₅ |

7.5mm or 3.6mm

|f ₃ +f ₅ |

6.8mm or 3.8mm

|f ₃ +f ₅ |

6.8mm or 4.1mm

|f ₃ +f ₅ |

7.2mm or 4.1mm

|f ₃ +f ₅ |

7.5mm has better effect, if the condition (1) is modified to 4.1mm

|f ₃ +f ₅ |

6.8mm has better effect. Or, if the condition (1) is modified to 3.6mm

f ₃ +f ₅

7.5mm or 3.6mm

f ₃ +f ₅

7.2mm or 3.6mm

f ₃ +f ₅

6.8mm or 3.8mm

f ₃ +f ₅

7.5mm or 3.8mm

f ₃ +f ₅

7.2mm or 3.8mm

f ₃ +f ₅

6.8mm or 4.1mm

f ₃ +f ₅

7.2mm or 4.1mm

f ₃ +f ₅

7.5mm has better effect, if the condition (1) is modified to 4.1mm

f ₃ +f ₅

6.8mm has better effect.

|f₂/f₃|

5或2.8

|f₂/f₃|

4.54或3.02

|f₂/f₃|

6或3.02

|f₂/f₃|

5或3.02

|f₂/f₃|

4.54或3.36

|f₂/f₃|

5或3.36

|f₂/f₃|

6則有較佳效果，若條件(5)修改為3.36

|f₂/f₃|

4.5則有更佳效果。又或者，若條件(5)修改為2.8

f₂/f₃

4.5或2.8

f₂/f₃

5或2.8

f₂/f₃

6或3.02

f₂/f₃

5或3.02

f₂/f₃

6或3.02

f₂/f₃

4.54或3.36

f₂/f₃

5或3.36

f₂/f₃

6則有較佳效果，若條件(5)修改為3.36

f₂/f₃

4.54則有更佳效果。 In one or more embodiments of the present invention, if the condition (5) is modified to 2.8

|f ₂ /f ₃ |

5 or 2.8

|f ₂ /f ₃ |

4.54 or 3.02

|f ₂ /f ₃ |

6 or 3.02

|f ₂ /f ₃ |

5 or 3.02

|f ₂ /f ₃ |

4.54 or 3.36

|f ₂ /f ₃ |

5 or 3.36

|f ₂ /f ₃ |

6 has better effect, if the condition (5) is modified to 3.36

|f ₂ /f ₃ |

4.5 has better effect. Or, if condition (5) is changed to 2.8

f ₂ /f ₃

4.5 or 2.8

f ₂ /f ₃

5 or 2.8

f ₂ /f ₃

6 or 3.02

f ₂ /f ₃

5 or 3.02

f ₂ /f ₃

6 or 3.02

f ₂ /f ₃

4.54 or 3.36

f ₂ /f ₃

5 or 3.36

f ₂ /f ₃

6 has better effect, if the condition (5) is modified to 3.36

f ₂ /f ₃

4.54 has better effect.

|f₂+f₄|

12mm或2.5mm

|f₂+f₄|

13mm或4mm

|f₂+f₄|

12mm或4mm

|f₂+f₄|

13mm或4mm

|f₂+f₄|

13.6mm或 5mm

|f₂+f₄|

13mm或5mm

|f₂+f₄|

13.6mm則有較佳效果，若條件(6)修改為5mm

|f₂+f₄|

12mm則有更佳效果。又或者，若條件(6)修改為-13.6mm

f₂+f₄

-2.5mm或-13.6mm

f₂+f₄

-4mm或-13.6mm

f₂+f₄

-5mm或-13mm

f₂+f₄

-2.5mm或-13mm

f₂+f₄

-4mm或-13mm

f₂+f₄

-5mm或-12mm

f₂+f₄

-2.5mm或-12mm

f₂+f₄

-4mm則有較佳效果，若條件(6)修改為-12mm

f₂+f₄

-5mm則有更佳效果。 In one or more embodiments of the present invention, if the condition (6) is modified to 2.5mm

|f ₂ +f ₄ |

12mm or 2.5mm

|f ₂ +f ₄ |

13mm or 4mm

|f ₂ +f ₄ |

12mm or 4mm

|f ₂ +f ₄ |

13mm or 4mm

|f ₂ +f ₄ |

13.6mm or 5mm

|f ₂ +f ₄ |

13mm or 5mm

|f ₂ +f ₄ |

13.6mm has better effect, if condition (6) is modified to 5mm

|f ₂ +f ₄ |

12mm has better effect. Or, if the condition (6) is modified to -13.6mm

f ₂ +f ₄

-2.5mm or -13.6mm

f ₂ +f ₄

-4mm or -13.6mm

f ₂ +f ₄

-5mm or -13mm

f ₂ +f ₄

-2.5mm or -13mm

f ₂ +f ₄

-4mm or -13mm

f ₂ +f ₄

-5mm or -12mm

f ₂ +f ₄

-2.5mm or -12mm

f ₂ +f ₄

-4mm has better effect, if condition (6) is modified to -12mm

f ₂ +f ₄

-5mm has better effect.

|f₂/f₄|

2.61或1.5

|f₂/f₄|

2.5或1.8

|f₂/f₄|

3或1.8

|f₂/f₄|

2.61或1.8

|f₂/f₄|

2.5或1.69

|f₂/f₄|

3或1.69

|f₂/f₄|

2.61則有較佳效果，若條件(7)修改為1.69

|f₂/f₄|

2.5則有更佳效果。又或者，若條件(7)修改為-3

f₂/f₄

-1.5或-3

f₂/f₄

-1.69或-3

f₂/f₄

-1.8或-2.61

f₂/f₄

-1.5或-2.61

f₂/f₄

-1.69或-2.61

f₂/f₄

-1.8或-2.5

f₂/f₄

-1.5或-2.5

f₂/f₄

-1.69則有較佳效果，若條件(7)修改為-2.5

f₂/f₄

-1.8則有更佳效果。 In one or more embodiments of the present invention, if the condition (7) is modified to 1.5

|f ₂ /f ₄ |

2.61 or 1.5

|f ₂ /f ₄ |

2.5 or 1.8

|f ₂ /f ₄ |

3 or 1.8

|f ₂ /f ₄ |

2.61 or 1.8

|f ₂ /f ₄ |

2.5 or 1.69

|f ₂ /f ₄ |

3 or 1.69

|f ₂ /f ₄ |

2.61 has better effect, if the condition (7) is modified to 1.69

|f ₂ /f ₄ |

2.5 has better effect. Or, if condition (7) is changed to -3

f ₂ /f ₄

-1.5 or -3

f ₂ /f ₄

-1.69 or -3

f ₂ /f ₄

-1.8 or -2.61

f ₂ /f ₄

-1.5 or -2.61

f ₂ /f ₄

-1.69 or -2.61

f ₂ /f ₄

-1.8 or -2.5

f ₂ /f ₄

-1.5 or -2.5

f ₂ /f ₄

-1.69 has better effect, if condition (7) is modified to -2.5

f ₂ /f ₄

-1.8 has better effect.

T_STL1/F#

1.4mm或0.48mm

T_STL1/F#

1.68mm則有較佳效果，若條件(8)修改為0.48mm

T_STL1/F#

1.4mm則有更佳效果。 In one or more embodiments of the present invention, if the condition (8) is modified to 0.38mm

T _STL1 /F#

1.4mm or 0.48mm

T _STL1 /F#

1.68mm has better effect, if the condition (8) is modified to 0.48mm

T _STL1 /F#

1.4mm has better effect.

Thereby, the optical lens of the present invention can effectively shorten the total length of the lens, effectively improve the resolution, effectively correct the chromatic aberration, and effectively correct the aberration.

The first embodiment of the optical lens of the present invention will now be described in detail. Please refer to FIG. 1, the optical lens 1 includes an aperture in sequence along an optical axis OA1 from a projection side to an image source side ST1, a first lens L11, a second lens L12, a third lens L13, a fourth lens L14, a fifth lens L15, a lens P1 and a protective glass CG1. During projection, light from an image source IS1 is finally projected on the projection surface S12.

The first lens L11 may have positive refractive power, for example. The first lens L11 may be a meniscus lens, for example, the projection side S13 may be a convex surface, and the image source side S14 may be a concave surface, for example. The projection side S13 of the first lens L11 may be, for example, a spherical surface, and the image source side S14 may be, for example, a spherical surface. The first lens can be made of glass, for example.

The second lens L12 may have negative refractive power, for example. The second lens L12 may be a meniscus lens, for example, the projection side S15 may be a convex surface, and the image source side S16 may be a concave surface, for example. The projection side S15 of the second lens L12 may be, for example, a spherical surface, and the image source side S16 may be, for example, a spherical surface. The second lens L12 is made of glass material, for example.

The third lens L13 may have negative refractive power, for example. The third lens L13 may be, for example, a biconcave lens, the projection side S17 of which is concave, and the image source side S18 of which is concave. The projection side S17 of the third lens L13 may be, for example, a spherical surface, and the image source side S18 may be, for example, a spherical surface. The third lens L13 may be made of glass material, for example.

The fourth lens L14 may have positive refractive power, for example. The fourth lens L14 may be, for example, a meniscus lens, and its projection side S19 may be, for example, a concave surface, and the image source side S110 may be, for example, a convex surface. The projection side S19 of the fourth lens L14 may be, for example, a spherical surface, and the image source side S110 may be, for example, a spherical surface. The fourth lens L14 can be made of glass, for example.

The fifth lens L15 may have positive refractive power, for example. The fifth lens L15 may be, for example, a plano-convex lens, and its projection side S111 is convex, and the image source side S112 is flat. The projection side S111 of the fifth lens may be, for example, a spherical surface, and the image source side S112 may be, for example, a spherical surface. The fifth lens L15 may be made of glass material, for example.

The projected side S113 of the round P1 can be, for example, a plane, and the image source side S114 can be, for example, a plane.

The projection side S115 of the cover glass CG1 may be, for example, a plane, and the image source side S116 may be, for example, a plane.

Using the above lens, aperture ST1, 珜鏡P1 and the design that meets at least one of the conditions (1) to (8), the optical lens 1 can effectively shorten the total length of the lens, effectively improve the resolution, and effectively correct the chromatic aberration , Effective correction of aberrations.

Table 1 is a table of related parameters of each lens of the optical lens 1 in FIG. 1. The effective focal length of the optical lens 1 can be 10 mm; the aperture value can be 3.57; the total lens length can be 22.42 mm, preferably 18.75 mm; The field of view can be 29.7 degrees. For the convenience of explanation, the following will take the total lens length of 18.75mm as an example.

In addition, the distance T _5IMG from the side of the image source of the fifth lens L15 of the optical lens 1 to the image source on the optical axis may be 9.85 mm, preferably 6.217 mm, and more preferably 6.18 mm; the first lens L11 The distance T ₁₅ from the projection side S13 to the image source side S112 of the fifth lens L15 on the optical axis OA1 can be 7.57mm; the half-height IMGH of the optical lens can be 2.65mm; the aperture to the projection side of the first lens is on the light The distance between shafts T _STL1 can be 5.0 mm. For the convenience of explanation, the following will take 6.18mm pitch T _5IMG as an example.

Table 2 is the calculated values of the relevant parameter values of the optical lens 1 of the first embodiment corresponding to the conditions (1) to (8). As can be seen from Table 2, the optical lens 1 of the first embodiment can satisfy the conditions (1) to Requirements of condition (8).

In addition, as can be seen from FIGS. 2A to 2C, the optical lens 1 can also achieve the required optical performance. The field curvature of the optical lens 1 is between -0.02mm and 0.04mm (as shown in Figure 2A), the distortion is between -0.7% and 0% (as shown in Figure 2B), and the lateral chromatic aberration is 0μm Between 3.0μm (as shown in Figure 2C), the modulation transfer function value is between 0.57 and 1.0 (as shown in Figure 2D).

It is obvious that the field curvature, distortion and lateral chromatic aberration of the optical lens 1 can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 3, which is a schematic diagram of a lens configuration and an optical path according to the second embodiment of the optical lens of the present invention. The optical lens 2 includes an aperture ST2, a first lens L21, a second lens L22, a third lens L23, a fourth lens L24, a lens in sequence along an optical axis OA2 from a projection side to an image source side The fifth lens L25, a P2 and a protective glass CG2. During projection, light from an image source IS2 is finally projected on the projection surface S22.

The refractive power, surface shape and material of the first lens L21, the second lens L22, the third lens L23 and the fourth lens L24, the refractive power of the fifth lens L25, the material and the surface shape of the projection side S211 as well as Lei P2 and the protective glass CG2 The surface shape and material of can be the same as or similar to the corresponding elements in the first embodiment, and will not be repeated here.

The fifth lens L25 may be a biconvex lens, and its projection side S211 is convex, and the image source side S212 is convex.

Using the above lens, aperture ST2, 稜鏡P2 and the design that meets at least one of the conditions (1) to (8), the optical lens 2 can effectively shorten the total length of the lens, effectively improve the resolution, and effectively correct the chromatic aberration , Effective correction of aberrations.

Table 3 is a table of related parameters of each lens of the optical lens 2 in Figure 3. The effective focal length of the optical lens 2 can be 10 mm; the aperture value can be 1.997; the total lens length can be 20.01 mm, preferably 16.295 mm; The field of view can be 29.6 degrees. For convenience of explanation, the following will take the total lens length of 16.295mm as an example.

In addition, the distance T _5IMG from the side of the image source of the fifth lens L25 of the optical lens 2 to the image source on the optical axis may be 9.85 mm, preferably 6.217 mm, more preferably 6.135 mm; the first lens L21 The distance T ₁₅ between the projection side S23 to the image source side S212 of the fifth lens L25 on the optical axis OA2 can be 9.16mm; the half-height IMGH of the optical lens can be 2.65mm; the aperture to the projection side of the first lens is on the light The distance T _STL1 between the _shafts can be 1.00 mm. For the convenience of explanation, the following will take 6.135mm pitch T _5IMG as an example.

Table 4 shows the related parameter values of the optical lens 2 of the second embodiment and the calculated values of the corresponding conditions (1) to (8). As can be seen from Table 4, the optical lens 2 of the second embodiment can satisfy the condition (1 ) To the requirements of condition (8).

In addition, as can be seen from FIGS. 4A to 4C, the optical lens 2 can also achieve the required optical performance. The field curvature of the optical lens 2 is between -0.02mm and 0.03mm (as shown in Figure 4A), the distortion is between -1.4% and 0% (as shown in Figure 4B), and the lateral chromatic aberration is between 0μm Between 2.5μm (as shown in Figure 4C), the modulation transfer function value is between 0.56 and 1.0 (as shown in Figure 4D).

It is obvious that the field curvature, distortion, and lateral chromatic aberration of the optical lens 2 can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 5. FIG. 5 is the third embodiment of the optical lens according to the present invention. Schematic diagram of the lens configuration and optical path of the embodiment. The optical lens 3 includes an aperture ST3, a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, a lens in sequence along an optical axis OA3 from a projection side to an image source side The fifth lens L35, a prism P3 and a protective glass CG3. During projection, light from an image source IS3 is finally projected on the projection surface S32.

The refractive power, material and surface shape of the first lens L31, the second lens L32, the third lens L33, the fourth lens L34, and the fifth lens L35 may be the same as or similar to the corresponding elements in the second embodiment, P3 and protection The material and surface shape of the glass CG3 may be the same as or similar to the corresponding elements of the second embodiment, and will not be repeated here.

Using the above lens, aperture ST3, 稜鏡P3 and the design that meets at least one of the conditions (1) to (8), the optical lens 3 can effectively shorten the total length of the lens, effectively improve the resolution, and effectively correct the chromatic aberration , Effective correction of aberrations.

Table 5 is a table of related parameters of each lens of the optical lens 3 in FIG. 5, the effective focal length of the optical lens 3 may be 10 mm; the aperture value may be 3.33; the total lens length may be 20.558 mm, preferably 16.885 mm; The field of view can be 29.7 degrees. For convenience of explanation, the following will take the total lens length of 16.885 mm as an example.

In addition, the distance T _5IMG from the side of the image source of the fifth lens L35 of the optical lens 3 to the image source on the optical axis may be 9.85 mm, preferably 6.217 mm, more preferably 6.177 mm; the first lens L31 The distance T ₁₅ from the projection side S33 to the image source side S312 of the fifth lens L35 on the optical axis OA3 can be 7.71mm; the half-height IMGH of the optical lens can be 2.65mm; the aperture to the projection side of the first lens is on the light The distance T _STL1 between the _shafts can be _{3.00 mm} . For the convenience of explanation, the following will take 6.177mm pitch T _5IMG as an example.

Table 6 shows the related parameter values of the optical lens 3 of the third embodiment and the calculated values of the corresponding conditions (1) to (8). As can be seen from Table 6, the optical lens 3 of the third embodiment can satisfy the condition (1 ) To the requirements of condition (8).

In addition, as can be seen from FIGS. 6A to 6C, the optical lens 3 can also achieve the required optical performance. The field curvature of the optical lens 3 is between -10μm and 16μm (as shown in Figure 6A), the distortion is between -0.008% and 0.02% (as shown in Figure 6B), and the lateral chromatic aberration is between 0μm and 2.0 Between μm (as shown in Figure 6C), the modulation transfer function value is between 0.71 and 1.0 (as shown in Figure 6D).

It is obvious that the field curvature, distortion, and lateral chromatic aberration of the optical lens 3 can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 7, which is a schematic diagram of a lens configuration and optical path according to the fourth embodiment of the optical lens of the present invention. The optical lens 4 includes an aperture ST4, a first lens L41, a second lens L42, a third lens L43, a fourth lens L44, a lens in order along an optical axis OA4 from a projection side to an image source side The fifth lens L45, a P4 and a protective glass CG4. During projection, light from an image source IS4 is finally projected on the projection surface S42.

The refractive power, material and surface shape of the first lens L41, the second lens L42, the third lens L43, the fourth lens L44, the fifth lens L45 may be the same as or similar to the corresponding elements in the second embodiment, P4 and protection The material and surface shape of the glass CG4 may be the same as or similar to the corresponding elements of the second embodiment, and will not be repeated here.

The use of the above lens, aperture ST4, 珜鏡P4 and the design that meets at least one of the conditions (1) to (8) makes the optical lens 4 effectively shorten the total length of the lens, effective Improves resolution, effectively corrects chromatic aberration, and effectively corrects aberrations.

Table 7 is a table of related parameters of each lens of the optical lens 4 in FIG. 7, the effective focal length of the optical lens 4 can be 9mm; the aperture value can be 3; the total lens length can be 20.60mm, preferably 16.915mm; The field of view can be 32.77 degrees. For convenience of explanation, the following will take the total lens length of 16.915 mm as an example.

In addition, the distance T _5IMG from the image source side of the fifth lens L45 of the optical lens 4 to the image source on the optical axis may be 9.85 mm, preferably 6.217 mm, and more preferably 6.17 mm; the first lens L41 The distance T ₁₅ from the projection side S43 to the image source side S412 of the fifth lens L45 on the optical axis OA4 can be 7.75mm; the half-height IMGH of the optical lens can be 2.65mm; the aperture to the projection side of the first lens is on the light The distance T _STL1 between the _shafts can be _{3.00 mm} . For convenience of explanation, the following will take 6.17mm pitch T _5IMG as an example.

Table 8 shows the related parameter values of the optical lens 4 of the fourth embodiment and the calculated values of the corresponding conditions (1) to (8). As can be seen from Table 8, the optical lens 4 of the fourth embodiment can satisfy the condition (1 ) To the requirements of condition (8).

In addition, as can be seen from FIGS. 8A to 8C, the optical lens 4 can also achieve the required optical performance. The field curvature of the optical lens 4 is between -0.015mm and 0.025mm (as shown in Figure 8A), the distortion is between -1.8% and 0% (as shown in Figure 8B), and the lateral chromatic aberration is- Between 1.5μm and 2.5μm (as shown in Figure 8C), the modulation transfer function value is between 0.65 and 1.0 (as shown in Figure 8D).

It is obvious that the field curvature, distortion and lateral chromatic aberration of the optical lens 4 can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 9, which is a schematic diagram of a lens configuration and optical path of a fifth embodiment of the optical lens according to the present invention. The optical lens 5 includes an aperture ST5, a first lens L51, a second lens L52, a third lens L53, a fourth lens L54, a lens in sequence along an optical axis OA5 from a projection side to an image source side The fifth lens L55, a Phantom P5 and a protective glass CG5. During projection, light from an image source IS5 is finally projected on the projection surface S52.

The refractive power, material and surface shape of the first lens L51, the second lens L52, the third lens L53, the fourth lens L54 and the fifth lens L55 may be the same as or similar to the corresponding elements in the second embodiment, P5 and protection The material and surface shape of the glass CG5 may be the same as or similar to the corresponding elements of the second embodiment, and will not be repeated here.

The use of the above lens, aperture ST5, 稜鏡P5 and the design that meets at least one of the conditions (1) to (8) allows the optical lens 5 to effectively shorten the total length of the lens, effectively improve the resolution, and effectively correct the chromatic aberration , Effective correction of aberrations.

Table 9 is a table of related parameters of each lens of the optical lens 5 in Figure 9. The effective focal length of the optical lens 5 can be 8mm; the aperture value can be 2.66; the total lens length can be 18.617mm, preferably 14.937mm; The field of view can be 36.6 degrees. For convenience of explanation, the following will take the total lens length of 14.937 mm as an example.

In addition, the distance T _5IMG from the image source side of the fifth lens L55 of the optical lens 5 to the image source on the optical axis may be 9.85 mm, preferably 6.217 mm, and more preferably 6.17 mm; the first lens L51 The distance T ₁₅ from the projection side S53 to the image source side S512 of the fifth lens L55 on the optical axis OA5 can be 7.27mm; the half-height IMGH of the optical lens can be 2.65mm; the aperture to the projection side of the first lens is on the light The distance T _STL1 between the _shafts can be 1.5 mm. For convenience of explanation, the following will take 6.17mm pitch T _5IMG as an example.

Table 10 shows the relative parameter values of the optical lens 5 of the fifth embodiment and the calculated values of the corresponding conditions (1) to (8). From Table 10, it can be seen that the optical lens 5 of the fifth embodiment can satisfy the condition (1 ) To the requirements of condition (8).

In addition, as can be seen from FIGS. 10A to 10C, the optical lens 5 can also achieve the required optical performance. The field curvature of the optical lens 5 is between -0.015mm and 0.025mm (as shown in Figure 10A), the distortion is between -3.5% and 0% (as shown in Figure 10B), and the lateral chromatic aberration is- Between 3μm and 3.5μm (as shown in Figure 10C), the modulation transfer function value is between 038 and 1.0 (as shown in Figure 10D).

It is obvious that the field curvature, distortion and lateral chromatic aberration of the optical lens 5 can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 11, which is a schematic diagram of a lens configuration and an optical path of a sixth embodiment of the optical lens according to the present invention. The optical lens 6 includes an aperture ST6, a first lens L61, a second lens L62, a third lens L63, a fourth lens L64, a lens in sequence along an optical axis OA6 from a projection side to an image source side The fifth lens L65, a prism P6 and a protective glass CG6. During projection, light from an image source IS6 is finally projected on the projection surface S62.

The refractive power, material and surface shape of the first lens L61, the second lens L62, the third lens L63, the fourth lens L64, the fifth lens L65 can be the same as or similar to the corresponding elements in the second embodiment, P6 and protection The material and surface shape of the glass CG6 may be the same as or similar to the corresponding elements of the second embodiment, and will not be repeated here.

The use of the above lens, aperture ST6, 稜鏡P6 and the design that meets at least one of the conditions (1) to (8) allows the optical lens 6 to effectively shorten the total length of the lens, effective Improves resolution, effectively corrects chromatic aberration, and effectively corrects aberrations.

Table 11 is a table of related parameters of each lens of the optical lens 6 in FIG. 11, the effective focal length of the optical lens 6 may be 10 mm; the aperture value may be 2.5; the total lens length may be 19.74 mm, preferably 16.050 mm ; The field of view can be 29.6 degrees. For the convenience of explanation, the following will take the total lens length of 16.050mm as an example.

In addition, the distance T _5IMG from the side of the image source of the fifth lens L65 of the optical lens 6 to the image source on the optical axis may be 9.85 mm, preferably 6.217 mm, more preferably 6.16 mm; the first lens L61 The distance T ₁₅ between the projection side S63 to the image source side S612 of the fifth lens L65 on the optical axis OA6 can be 8.39mm; the half-height IMGH of the optical lens can be 2.65mm; the aperture to the projection side of the first lens is on the light The distance T _STL1 between the _shafts can be 1.5 mm. For the convenience of explanation, the following will take 6.16mm pitch T _5IMG as an example.

Table 12 shows the related parameter values of the optical lens 6 of the sixth embodiment and the calculated values of the corresponding conditions (1) to (8). As can be seen from Table 12, the optical lens 6 of the sixth embodiment can satisfy the conditions (1) To the requirements of condition (8).

In addition, as can be seen from FIGS. 12A to 12C, the optical lens 6 can also achieve the required optical performance. The field curvature of the optical lens 6 is between -8μm and 20μm (as shown in Figure 12A), the distortion is between -0.6% and 0% (as shown in Figure 12B), and the lateral chromatic aberration is -0.6μm Between 1.8μm (as shown in Figure 12C), the modulation transfer function value is between 0.72 and 1.0 (as shown in Figure 12D).

It is obvious that the field curvature, distortion, and lateral chromatic aberration of the optical lens 6 can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 13. FIG. 13 is a schematic diagram of a lens configuration and an optical path according to the seventh embodiment of the optical lens of the present invention. The optical lens 7 includes an aperture ST7, a first lens L71, a second lens L72, a third lens L73, a fourth lens L74, a lens in sequence along an optical axis OA7 from a projection side to an image source side The fifth lens L75, a P7 lens and a protective glass CG7. During projection, light from an image source IS7 is finally projected on the projection surface S72.

The refractive power, material and surface shape of the first lens L71, the second lens L72, the third lens L73, the fourth lens L74 and the fifth lens L75 may be the same as or similar to the corresponding elements in the second embodiment, P7 and protection The material and surface shape of the glass CG7 may be the same as or similar to the corresponding elements of the second embodiment, and will not be repeated here.

Using the above lens, aperture ST7, 稜鏡P7 and the design that meets at least one of the conditions (1) to (8), the optical lens 7 can effectively shorten the total length of the lens, effectively improve the resolution, and effectively correct the chromatic aberration , Effective correction of aberrations.

Table 13 is a table of related parameters of each lens of the optical lens 7 in FIG. 13, the effective focal length of the optical lens 7 can be 10mm; the aperture value can be 1.66; the total lens length can be 20.450mm, preferably 16.429mm ; The field of view can be 29.6 degrees. For the convenience of explanation, the following will take the total lens length of 16.429mm as an example.

In addition, the distance T _5IMG from the image source side of the fifth lens L75 of the optical lens 7 to the image source on the optical axis may be 9.85 mm, preferably 5.959 mm, more preferably 5.83 mm; the first lens L71 The distance T ₁₅ between the projection side S73 to the image source side S712 of the fifth lens L75 on the optical axis OA7 can be 9.80 mm; the half-height IMGH of the optical lens can be 2.65 mm; the aperture to the projection side of the first lens is on the light The distance T _STL1 between the _shafts can be 0.8 mm. For the convenience of explanation, the following will take 5.83mm pitch T _5IMG as an example.

Table 14 shows the relevant parameter values of the optical lens 7 of the seventh embodiment and the calculated values of the corresponding conditions (1) to (8). From Table 14, it can be seen that the optical lens 7 of the seventh embodiment can satisfy the conditions (1) To the requirements of condition (8).

In addition, as can be seen from FIGS. 14A to 14C, the optical lens 7 can also achieve the required optical performance. The field curvature of the optical lens 7 is between -0.01mm and 0.03mm (as shown in Figure 14A), the distortion is between -3% and 0% (as shown in Figure 14B), and the lateral chromatic aberration is- Between 3.0μm and 3.0μm (as shown in Figure 14C), the modulation transfer function value is between 0.34 and 1.0 (as shown in Figure 14D).

It is obvious that the field curvature, distortion, and lateral chromatic aberration of the optical lens 7 can be effectively corrected, and the lens resolution can also meet the requirements, thereby obtaining better optical performance.

Although the present invention has been disclosed as above in an embodiment, it is not intended to limit the present invention. Anyone who is familiar with this art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection of the present invention The scope shall be determined by the scope of the attached patent application.

1‧‧‧Optical lens

L11‧‧‧First lens

L12‧‧‧Second lens

L13‧‧‧third lens

L14‧‧‧Fourth lens

L15‧‧‧fifth lens

ST1‧‧‧Aperture

P1‧‧‧珜鏡

PG1‧‧‧protective glass

OA1‧‧‧Optical axis

IS1‧‧‧Image source

S11‧‧‧Aperture

S12‧‧‧Projection surface

S13‧‧‧Side of the first lens

S14‧‧‧The first lens image side

S15‧‧‧Second lens object side

S16‧‧‧Second lens image side

S17‧‧‧Side of third lens

S18‧‧‧ Image side of the third lens

S19‧‧‧Side of the fourth lens

S110‧‧‧Image side of fourth lens

S111‧‧‧Side of fifth lens

S112‧‧‧The fifth lens image side

S113‧‧‧Side

S114‧‧‧Portrait of Lu Han

S115‧‧‧Protection glass side

S116‧‧‧Protection glass side

Claims (10)

An optical lens includes: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having refractive power, the fourth lens including a concave surface facing a projection side; and A fifth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially arranged along the optical axis from the projection side to an image source side ; Where the optical lens meets the following conditions:-2.10

f ₂ /f

-1.38; where f is one of the effective focal lengths of the optical lens, and f _{2 is} one of the focal lengths of the second lens. An optical lens includes: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having refractive power, the fourth lens including a concave surface facing a projection side; and A fifth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially arranged along the optical axis from the projection side to an image source side ; The optical lens meets the following conditions: 3.6mm

|f ₃ +f ₅ |

7.5 mm; where, f _{3 is} one focal length of the third lens, and f _{5 is} one focal length of the fifth lens. An optical lens includes: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having refractive power, the fourth lens including a concave surface facing a projection side; and A fifth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially arranged along the optical axis from the projection side to an image source side ; Where the optical lens meets the following conditions: 0.32

T _5IMG /TTL

0.41; wherein, T _5IMG is an equivalent air distance from the side of an image source of the fifth lens to an image source on the optical axis, and TTL is the total length of a lens of the optical lens. An optical lens includes: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having refractive power, the fourth lens including a concave surface facing a projection side; and A fifth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially arranged along the optical axis from the projection side to an image source side ; Where the optical lens meets the following conditions: 2.7

T ₁₅ /IMGH

3.7; wherein, T ₁₅ is a distance between a projection side of the first lens and an image source side of the fifth lens on the optical axis, and IMGH is half of the image height of the optical lens. An optical lens includes: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having refractive power, the fourth lens including a concave surface facing a projection side; and A fifth lens has positive refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially arranged along the optical axis from the projection side to an image source side ; Where the optical lens meets the following conditions: 2.8

|f ₂ /f ₃ |

6; wherein, f _{2 is a} focal length of the second lens, and f _{3 is a} focal length of the third lens. An optical lens includes: an aperture; a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens having a refractive power, the fourth lens including a concave surface facing a projection Side; and a fifth lens with positive refractive power; wherein the aperture, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens along the optical axis from the projection side to a The image source side is arranged in order; the optical lens meets the following conditions: 0.38mm

T _STL1 /F#

_1.68mm ; wherein, T _{STL1 is a distance between} the aperture and a projection side of the first lens on the optical axis, and F# is an aperture value of the optical lens. The optical lens as claimed in any one of claims 1 to 6, wherein: the first lens includes a convex surface facing the projection side and a concave surface facing the image source side; the second lens includes a A convex surface faces the projection side and a concave surface faces the image source side; the third lens includes a concave surface facing the projection side and another concave surface faces the image source side; the fourth lens has a positive refractive power, and further includes a convex surface facing the The image source side; and the fifth lens includes a convex surface facing the projection side and a plane facing the image source side. The optical lens as claimed in any one of claims 1 to 6, wherein: the first lens includes a convex surface facing the projection side and a concave surface facing the image source side; the second lens includes a A convex surface faces the projection side and a concave surface faces the image source side; the third lens includes a concave surface facing the projection side and another concave surface faces the image source side; the fourth lens has a positive refractive power, and further includes a convex surface facing the The image source side; and the fifth lens includes a convex surface facing the projection side and a convex surface facing the image source side. The optical lens as described in any one of claims 1 to 6 of the patent application scope, wherein the optical lens satisfies the following conditions: -13.6mm

f ₂ +f ₄

-2.5mm; wherein, f _{2 is a} focal length of the second lens, and f _{4 is a} focal length of the fourth lens. The optical lens as described in any one of claims 1 to 6 in the patent application scope, wherein the optical lens satisfies the following conditions: 1.5

|f ₂ /f ₄ |

3; wherein, f _{2 is a} focal length of the second lens, and f _{4 is a} focal length of the fourth lens.

Images