CN115407492B - Optical lens and imaging device including the same - Google Patents
Optical lens and imaging device including the same Download PDFInfo
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- CN115407492B CN115407492B CN202211253023.4A CN202211253023A CN115407492B CN 115407492 B CN115407492 B CN 115407492B CN 202211253023 A CN202211253023 A CN 202211253023A CN 115407492 B CN115407492 B CN 115407492B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/04—Reversed telephoto objectives
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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Abstract
本发明提供一种光学镜头及包括该光学镜头的成像设备，其中的光学镜头沿着光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜、第七透镜、第八透镜、第九透镜、第十透镜、第十一透镜、第十二透镜、第十三透镜和第十四透镜；本发明提供的光学镜头具有像方远心光路结构，能够匹配后置光谱分光系统，具有宽谱段、大视场、色差小的优点。
The present invention provides an optical lens and an imaging device comprising the optical lens, wherein the optical lens comprises, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, a thirteenth lens and a fourteenth lens; the optical lens provided by the present invention has an image-side telecentric optical path structure, can match a post-spectral spectroscopic system, and has the advantages of a wide spectrum band, a large field of view and small chromatic aberration.
Description
Technical Field
The present invention relates to the field of optical design, and in particular, to an optical lens and an imaging device including the same.
Background
The polarization spectrum imaging technology is used as a novel optical detection technology, the acquired information quantity is greatly increased compared with the traditional optical detection technology, and the polarization spectrum imaging technology is gradually widely applied in various fields. With the development of unmanned aerial vehicle technology, the remote sensing load of the airborne polarized spectrum by using the unmanned aerial vehicle as a remote sensing platform is rapidly developed, wherein the polarized spectrum intensity modulation technology is an advanced technology in the polarized spectrum imaging technology. The simultaneous acquisition of the polarization spectrum information of the target to be detected can be completed by using a polarization intensity modulation module (PSIM), and the static, snapshot and full Stokes spectrum measurement of the target light can be realized. In order to improve the working efficiency and the detection range of a broadband of airborne equipment, the main development direction of an airborne polarization imaging spectrometer is large-field-of-view and broad-spectrum detection. The telescope lens in the imaging spectrometer mainly plays a role in imaging a target, so that the telescope system determines the imaging quality of the imaging spectrometer, and the design of the telescope lens is crucial.
In order to ensure that the airborne polarization imaging spectrometer can acquire polarization information of a target, a PSIM module is adopted to modulate the polarization intensity of incident light, the requirement of the PSIM module on the incident angle of the incident light is required to be smaller than 5 degrees, and meanwhile, in order to complete splicing with a subsequent spectrum light splitting system of the imaging spectrometer, the telescopic system is required to have an image space telecentric light path structure. Therefore, the design of the telescope lens of the onboard polarization spectrum imager has a certain technical difficulty.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an optical lens and an imaging apparatus including the optical lens, which can meet the requirements of wide field angle and broadband coverage on the premise of meeting the use requirements of a polarization intensity modulation module.
In order to achieve the above purpose, the present invention adopts the following specific technical scheme:
the invention provides an optical lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, a thirteenth lens and a fourteenth lens from an object side to an image side along an optical axis;
The first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
The second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
The third lens has negative focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a concave surface;
The fourth lens has positive focal power, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface;
the fifth lens has negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface;
the sixth lens element has positive refractive power, wherein an object-side surface of the sixth lens element is concave, and an image-side surface of the sixth lens element is convex;
the seventh lens has negative focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface;
The eighth lens has positive focal power, the object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a concave surface;
the ninth lens has negative focal power, the object side surface of the ninth lens is a convex surface, and the image side surface of the ninth lens is a concave surface;
The tenth lens has positive focal power, the object side surface of the tenth lens is a convex surface, and the image side surface of the tenth lens is a convex surface;
The eleventh lens has negative focal power, the object side surface is concave, and the image side surface is convex;
the twelfth lens has positive focal power, the object side surface of the twelfth lens is a convex surface, and the image side surface of the twelfth lens is a convex surface;
the thirteenth lens element has positive refractive power, wherein the object-side surface of the thirteenth lens element is convex, and the image-side surface of the thirteenth lens element is convex;
the fourteenth lens element has negative refractive power, wherein the object-side surface thereof is concave, and the image-side surface thereof is concave.
The fourth lens and the fifth lens form a first cemented lens; the ninth lens and the tenth lens form a third cemented lens;
The third lens, the fourth lens, the eleventh lens and the fourteenth lens are glass aspheric lenses, and the rest lenses are glass spherical lenses.
Preferably, the lens system further comprises a diaphragm, wherein the diaphragm is positioned between the tenth lens and the eleventh lens and is used for limiting the incident light rays of the system.
Preferably, the optical system further comprises a PSIM module, wherein the PSIM module is placed between the third lens and the fourth lens and is used for detecting polarization information in light rays.
Preferably, -0.09< phi 1/phi < -0.07;
-0.35<Ф2/Ф<-0.3;
-0.35<Ф3/Ф<-0.25;
0.1<Ф4/Ф<0.3;
-0.1<Ф5/Ф<0;
0.1<Ф6/Ф<0.25;
-1.1<Ф7/Ф<-0.9;
0.7<Ф8/Ф<0.9;
-0.8<Ф9/Ф<-0.7;
1.1<Ф10/Ф<1.3;
-0.2<Ф11/Ф<-0.1;
0.3<Ф12/Ф<0.45;
0.3<Ф13/Ф<0.45;
-0.5<Ф14/Ф<-0.4;
Wherein:
Phi 1 is the optical power of the first lens;
Phi 2 is the optical power of the second lens;
phi 3 is the optical power of the third lens;
Phi 4 is the optical power of the fourth lens;
phi 5 is the optical power of the fifth lens;
phi 6 is the optical power of the sixth lens;
Φ 7 is the optical power of the seventh lens;
phi 8 is the optical power of the eighth lens;
phi 9 is the optical power of the ninth lens;
phi 10 is the optical power of the tenth lens;
Phi 11 is the optical power of the eleventh lens;
phi 12 is the optical power of the twelfth lens;
Φ 13 is the optical power of the thirteenth lens;
Phi 14 is the optical power of the fourteenth lens;
Φ is the optical power of the optical lens.
Preferably, the material of the first lens is D-ZLAF61, the aperture range of the light transmission is 77mm-78mm, and the thickness range is 19mm-20mm;
the material of the second lens is H-ZPK7, the aperture range of the light transmission is 51mm-52mm, and the thickness range is 2mm-3mm;
the third lens is made of H-LAF10LA, the aperture range of the light transmission is 43mm-44mm, and the thickness range is 2mm-3mm;
the fourth lens is made of H-TF5, the aperture range of the light transmission is 45mm-46mm, and the thickness range is 6mm-7mm;
the fifth lens is made of H-ZLAF N, the aperture range of the light transmission is 47mm-48mm, and the thickness range is 4mm-5mm;
The sixth lens is made of D-ZK2L, the aperture range of the light transmission is 41mm-42mm, and the thickness range is 9mm-10mm;
the seventh lens is made of H-ZF11, the aperture range of the light transmission is 15mm-16mm, and the thickness range is 2mm-3mm;
The eighth lens is made of H-ZF7LAGT, the aperture range of the light transmission is 13mm-14mm, and the thickness range is 1mm-2mm;
The ninth lens is made of H-ZLAF D, the aperture range of the light transmission is 13mm-14mm, and the thickness range is 0mm-1mm;
the tenth lens is made of H-ZPK7, the aperture range of the light transmission is 12mm-13mm, and the thickness range is 2mm-3mm;
The eleventh lens is made of H-BAF7, the aperture range of the light transmission is 15mm-16mm, and the thickness range is 3mm-4mm;
The twelfth lens is made of H-ZPK7, the aperture range of the light transmission is 37mm-38mm, and the thickness range is 9mm-10mm;
the thirteenth lens is made of H-FK95N, the aperture range of the light transmission is 33mm-34mm, and the thickness range is 9mm-10mm;
the fourteenth lens is made of D-LAK5, the aperture range of the light transmission is 30mm-31mm, and the thickness range of the light transmission is 3mm-4mm.
Preferably, the angle θ between the emergent light of the third lens and the optical axis is less than 5 °.
7. The optical lens of claim 6, wherein the optical lens has a focal length of 20mm, an f-number of 4, a spectral range of 400nm to 1700nm, and a field angle of 72 °.
Preferably, the aspherical surface types of the third lens, the fourth lens, the eleventh lens, and the fourteenth lens are:
Wherein,
Z is the axial sagittal height of the aspheric surface in the Z direction;
r is the distance from the point on the aspherical surface to the optical axis;
c is the curvature of the fitting sphere, and the numerical value is the reciprocal of the curvature radius;
k is a fitting cone coefficient;
A. b, C are the 4 th, 6 th and 8 th order coefficients of the aspherical polynomial respectively.
The present invention also provides an imaging device comprising the optical lens of any one of claims 1 to 8 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.
Compared with the prior art, the invention has the following advantages:
1. The invention has a field angle of 72 degrees, a working spectrum range of 400nm-1700nm, an image space telecentric light path structure, a rear spectrum light splitting system, a focal length of a telescope lens of 20mm, an F number of 4, a large field wide spectrum characteristic of the lens and excellent imaging quality.
2. The invention adopts a reverse long-distance structure with a front negative lens and a rear positive lens, meets the use requirement of a PSIM module, simultaneously adopts a transmission structure to reduce the polarization effect of an optical system on incident light, and has good polarization detection precision.
Drawings
Fig. 1 is a schematic structural diagram of an optical lens according to an embodiment of the present invention.
Fig. 2 is a dot column diagram of an optical lens provided according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an optical transfer function of an optical lens according to an embodiment of the present invention.
Fig. 4 is a schematic axial chromatic aberration curve of an optical lens according to an embodiment of the present invention.
The reference numerals include a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 10, an eleventh lens 11, a twelfth lens 12, a thirteenth lens 13, and a fourteenth lens 14.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, like modules are denoted by like reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, a detailed description thereof will not be repeated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the invention.
Fig. 1 shows a schematic structural diagram of an optical lens according to an embodiment of the present invention.
As shown in fig. 1, the optical lens provided by the embodiment of the invention includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 10, an eleventh lens 11, a twelfth lens 12, a thirteenth lens 13 and a fourteenth lens 14, which are sequentially arranged from an object plane to an image plane along an optical axis, and total 14 lenses.
Wherein the third lens 3, the fourth lens 4, the eleventh lens 11 and the fourteenth lens 14 are glass aspherical lenses.
The optical system provided by the invention further comprises a diaphragm, wherein the diaphragm is positioned in the light path between the tenth lens 10 and the eleventh lens, the diaphragm can limit the incident light of the system, and the imaging quality is improved by reasonably adjusting the position of the diaphragm.
The optical system provided by the invention can also comprise a PSIM module, and the detection and acquisition of polarization information can be performed by placing the PSIM module in the optical path between the third lens 3 and the fourth lens 4.
The fourth lens 4 and the fifth lens 5 form a cemented lens, the seventh lens 7 and the eighth lens 8 form a cemented lens, the ninth lens 9 and the tenth lens 10 form a cemented lens, and the cemented lens can effectively reduce or even eliminate chromatic aberration of the system, and meanwhile, the cemented lens can eliminate an air gap between the two lenses, so that the optical system is more compact.
The optical system provided by the invention has the spectral range of 400nm-1700nm and the field angle of 72 degrees, and is beneficial to improving the working efficiency of the airborne polarized remote sensing load.
The optical system provided by the invention is of an image space telecentric light path structure, and the principal rays of the incident rays of each view field of the telescope lens are vertically incident to the image surface, so that good splicing with a subsequent spectrum light splitting system can be realized, and the technical requirement of the telescope lens of an imaging spectrometer is completely met.
The focal power of the first lens is phi 1, the focal power of the second lens is phi 2, the focal power of the third lens is phi 3, the focal power of the fourth lens is phi 4, the focal power of the fifth lens is phi 5, the focal power of the sixth lens is phi 6, the focal power of the seventh lens is phi 7, the focal power of the eighth lens is phi 8, the focal power of the ninth lens is phi 9, the focal power of the tenth lens is phi 10, the focal power of the eleventh lens is phi 11, the focal power of the twelfth lens is phi 12, the focal power of the thirteenth lens is phi 13, and the focal power of the fourteenth lens is phi 14.
The optical power of the optical lens is phi.
Wherein:
-0.09<Ф1/Ф<-0.07;
-0.35<Ф2/Ф<-0.3;
-0.35<Ф3/Ф<-0.25;
0.1<Ф4/Ф<0.3;
-0.1<Ф5/Ф<0;
0.1<Ф6/Ф<0.25;
-1.1<Ф7/Ф<-0.9;
0.7<Ф8/Ф<0.9;
-0.8<Ф9/Ф<-0.7;
1.1<Ф10/Ф<1.3;
-0.2<Ф11/Ф<-0.1;
0.3<Ф12/Ф<0.45;
0.3<Ф13/Ф<0.45;
-0.5<Ф14/Ф<-0.4。
By reasonably distributing the focal power of each lens, the spherical aberration and curvature of field of the system are effectively reduced, and meanwhile, the image quality of each view field is ensured.
In the embodiment provided by the invention, one side of any lens adjacent to the object plane is an object plane, and one side of any lens adjacent to the image plane is an image plane.
The object side surface of the first lens 1 protrudes towards the object plane, and the image side surface of the first lens 1 is recessed towards the image plane;
the object side surface of the second lens 2 is convex towards the object plane, and the image side surface of the second lens 2 is concave towards the image plane;
the object side surface of the third lens 3 is concave towards the object plane, and the image side surface of the third lens 3 is concave towards the image plane;
the object side surface of the fourth lens 4 is concave towards the object plane, and the image side surface of the fourth lens 4 is convex towards the image plane;
the object side surface of the fifth lens 5 is concave towards the object plane, and the image side surface of the fifth lens 5 is convex towards the image plane;
the object side surface of the sixth lens 6 is concave towards the object plane, and the image side surface of the sixth lens 6 is convex towards the image plane;
The object side surface of the seventh lens 7 protrudes towards the object plane, and the image side surface of the seventh lens 7 is recessed towards the image plane;
The object side surface of the eighth lens 8 protrudes towards the object plane, and the image side surface of the eighth lens 8 is recessed towards the image plane;
the object side surface of the ninth lens 9 is convex towards the object plane, and the image side surface of the ninth lens 9 is concave towards the image plane;
The object side surface of the tenth lens 10 protrudes toward the object plane, and the image side surface of the tenth lens 10 protrudes toward the image plane;
the object side surface of the eleventh lens 11 is concave toward the object plane, and the image side surface of the eleventh lens 11 is convex toward the image plane;
the object side surface of the twelfth lens 12 protrudes toward the object plane, and the image side surface of the twelfth lens 12 protrudes toward the image plane;
the object side surface of the thirteenth lens 13 protrudes toward the object plane, and the image side surface of the thirteenth lens 13 protrudes toward the image plane;
the object-side surface of the fourteenth lens 14 is concave toward the object plane, and the image-side surface of the fourteenth lens 14 is concave toward the image plane.
In the examples provided by the invention:
The material of the first lens 1 is D-ZLAF61,77mm < light-transmitting aperture <78mm,19mm < thickness <20mm;
the material of the second lens 2 is H-ZPK7, the light-transmitting aperture is 51mm <52mm, and the thickness is 2mm <3mm;
the material of the third lens 3 is H-LAF10LA, the light transmission aperture is 43mm <44mm, and the thickness is 2mm <3mm;
The fourth lens 4 is made of H-TF5, the light transmission aperture of 45mm <46mm, the thickness of 6mm <7mm;
The fifth lens 5 is made of H-ZLAF N,47mm < light-transmitting aperture <48mm,4mm < thickness <5mm;
The sixth lens 6 is made of D-ZK2L, the light transmission aperture is 41mm <42mm, and the thickness is 9mm <10mm;
the seventh lens 7 is made of H-ZF11, the light transmission caliber is 15mm <16mm, and the thickness is 2mm <3mm;
The eighth lens 8 is made of H-ZF7LAGT,13mm < light-transmitting aperture <14mm,1mm < thickness <2mm;
the ninth lens 9 is made of H-ZLAF D,13mm < light-transmitting aperture <14mm,0mm < thickness <1mm;
The tenth lens 10 is made of H-ZPK7,12mm < light-transmitting aperture <13mm,2mm < thickness <3mm;
The eleventh lens 11 is made of H-BAF7, the light transmission aperture is 15mm <16mm, and the thickness is 3mm <4mm;
the twelfth lens 12 is made of H-ZPK7, the light-transmitting aperture is 37mm <38mm, and the thickness is 9mm <10mm;
The thirteenth lens 13 is made of H-FK95N,33mm < light-transmitting aperture <34mm,9mm < thickness <10mm;
The fourteenth lens 14 is made of D-LAK5, and has a light transmission aperture of 30mm <31mm, a light transmission aperture of 3mm <4mm, and a thickness.
The wide-spectrum large-view-field apochromatic telecentric telescope lenses are made of Chengdu bright glass, and chromatic aberration is eliminated by reasonably selecting glass materials, so that the performance of broadband image quality is improved.
Further, in the embodiments provided by the present invention:
the light transmission aperture of the first lens 1 is 77.73mm, and the thickness is 19.75mm;
the aperture of the second lens 2 is 51.42mm, and the thickness is 2.34mm;
the light transmission aperture of the third lens 3 is 43.58mm, and the thickness is 2.77mm;
the light transmission caliber of the fourth lens 4 is 45.84mm, and the thickness is 6.74mm;
the light-transmitting aperture of the fifth lens 5 is 47.73mm, and the thickness is 4.78mm;
the aperture of the sixth lens 6 is 41.15mm, and the thickness is 9.38mm;
the light-transmitting aperture of the seventh lens 7 is 15.48mm, and the thickness is 2.87mm;
the aperture of the eighth lens 8 is 13.72mm, and the thickness is 1.94mm;
the aperture of the ninth lens 9 is 13.38mm, and the thickness is 0.60mm;
the light transmission caliber of the tenth lens 10 is 12.67mm, and the thickness is 2.85mm;
The light transmission aperture of the eleventh lens 11 is 15.58mm, and the thickness is 3.03mm;
The aperture of the twelfth lens 12 is 37.93mm and the thickness is 9.46mm;
the light-transmitting aperture of the thirteenth lens 13 is 33.80mm and the thickness is 9.61mm;
the aperture of the fourteenth lens 14 is 30.36mm and the thickness thereof is 3.50mm.
The optical system provided by the invention has the advantages of excellent image quality, miniaturization, light weight and the like.
Fig. 2 shows a dot column diagram of an optical lens provided according to an embodiment of the present invention.
As shown in FIG. 2, it can be seen that the size of the diffuse spots corresponding to each view field of the optical system provided by the invention is smaller than 4.3um, which indicates that the lens has good imaging quality.
Fig. 3 shows a schematic diagram of an optical transfer function of an optical lens according to an embodiment of the present invention.
As shown in FIG. 3, in the spatial frequency within 55lp/mm, the MTF of the optical system provided by the invention in each view field is higher than 0.4, so that the design requirement of the optical lens is met.
Fig. 4 shows an axial chromatic aberration curve diagram of an optical lens according to an embodiment of the present invention.
As shown in FIG. 4, it can be seen from the graph that the axial chromatic aberration of the optical system provided by the invention at different wavelengths (0.4 um, 0.7um, 1.0um and 1.7 um) is within 0.04mm, and the bands approximately intersect at 0.707, which indicates that the chromatic aberration of the system is very small.
The lens data of the wide-spectrum large-view-field apochromatic telecentric telescope lens provided by the invention are as follows:
Table 1 shows the relevant optical parameters of the individual lenses in the optical lens.
TABLE 1
The aspheric surface type expression formula adopted in the embodiment of the invention is as follows:
Wherein,
Z is the axial sagittal height of the aspheric surface in the Z direction;
r is the distance from the point on the aspherical surface to the optical axis;
c is the curvature of the fitting sphere, and the numerical value is the reciprocal of the curvature radius;
k is a fitting cone coefficient;
A. b, C are the 4 th, 6 th and 8 th order coefficients of the aspherical polynomial respectively.
Table 2 shows coefficients of the respective aspherical higher order terms in the present embodiment.
TABLE 2
| Face number | Item of 4 th order | 6 Th order item | 8 Th order item |
| 5 | 7.672E-007 | -3.636E-010 | 5.760E-013 |
| 7 | -1.380E-006 | -9.824E-011 | -3.910E-013 |
| 19 | 2.651E-005 | 5.302E-008 | 1.341E-009 |
| 26 | 1.354E-005 | -2.807E-008 | 6.651E-011 |
The optical system provided by the invention has the focal length of 20mm, the F number of 4, the working wave band of 400-1700 nm, the field angle of 72 degrees and the total optical length of 277mm, is designed into an image space telecentric structure, can be put into a PSIM module to be used as a telescope lens of a polarization spectrum imager, adopts an aspheric surface technology in the design of the lens, corrects various aberrations of the system and has excellent image quality.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
The above embodiments of the present invention do not limit the scope of the present invention. Any of various other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Claims (9)
1. An optical lens is characterized by comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, a thirteenth lens and a fourteenth lens in sequence from an object side to an image side along an optical axis;
the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
the third lens has negative focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a concave surface;
the fourth lens has positive focal power, the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex;
the fifth lens has negative focal power, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is convex;
The sixth lens element with positive refractive power has a concave object-side surface and a convex image-side surface;
the seventh lens is provided with negative focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface;
the eighth lens has positive focal power, the object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a concave surface;
the ninth lens has negative focal power, the object side surface of the ninth lens is a convex surface, and the image side surface of the ninth lens is a concave surface;
the tenth lens has positive focal power, the object side surface of the tenth lens is a convex surface, and the image side surface of the tenth lens is a convex surface;
the eleventh lens has negative focal power, the object side surface of the eleventh lens is concave, and the image side surface of the eleventh lens is convex;
the twelfth lens has positive focal power, the object side surface of the twelfth lens is a convex surface, and the image side surface of the twelfth lens is a convex surface;
the thirteenth lens has positive focal power, the object side surface of the thirteenth lens is a convex surface, and the image side surface of the thirteenth lens is a convex surface;
the fourteenth lens has negative focal power, the object side surface of the fourteenth lens is a concave surface, and the image side surface of the fourteenth lens is a concave surface;
the seventh lens and the eighth lens form a second bonding lens, and the ninth lens and the tenth lens form a third bonding lens;
The third lens, the fourth lens, the eleventh lens and the fourteenth lens are glass aspheric lenses, and the rest lenses are glass spherical lenses.
2. The optical lens of claim 1, further comprising a stop positioned between the tenth and eleventh lenses for limiting incident light rays of the system.
3. The optical lens of claim 2, further comprising a PSIM module disposed between the third lens and the fourth lens for detecting polarization information in the light rays.
4. An optical lens as claimed in claim 3, wherein,
-0.09<Ф1/Ф<-0.07;
-0.35<Ф2/Ф<-0.3;
-0.35<Ф3/Ф<-0.25;
0.1<Ф4/Ф<0.3;
-0.1<Ф5/Ф<0;
0.1<Ф6/Ф<0.25;
-1.1<Ф7/Ф<-0.9;
0.7<Ф8/Ф<0.9;
-0.8<Ф9/Ф<-0.7;
1.1<Ф10/Ф<1.3;
-0.2<Ф11/Ф<-0.1;
0.3<Ф12/Ф<0.45;
0.3<Ф13/Ф<0.45;
-0.5<Ф14/Ф<-0.4;
Wherein:
Phi 1 is the optical power of the first lens;
phi 2 is the optical power of the second lens;
phi 3 is the optical power of the third lens;
Phi 4 is the optical power of the fourth lens;
phi 5 is the optical power of the fifth lens;
phi 6 is the optical power of the sixth lens;
phi 7 is the optical power of the seventh lens;
phi 8 is the optical power of the eighth lens;
phi 9 is the optical power of the ninth lens;
phi 10 is the optical power of the tenth lens;
Phi 11 is the optical power of the eleventh lens;
phi 12 is the optical power of the twelfth lens;
phi 13 is the optical power of the thirteenth lens;
Phi 14 is the optical power of the fourteenth lens;
Phi is the optical power of the optical lens.
5. The optical lens of claim 4, wherein,
The material of the first lens is D-ZLAF & lt 61 & gt, the aperture range of the light transmission is 77-78 mm, and the thickness range is 19-20 mm;
The second lens is made of H-ZPK, the aperture range of the light transmission is 51mm-52mm, and the thickness range is 2mm-3mm;
the third lens is made of H-LAF10LA, the aperture range of the light transmission is 43mm-44mm, and the thickness range is 2mm-3mm;
the fourth lens is made of H-TF5, the aperture range of the light transmission is 45mm-46mm, and the thickness range of the fourth lens is 6mm-7mm;
the fifth lens is made of H-ZLAF N, the aperture range of the light transmission is 47mm-48mm, and the thickness range is 4mm-5mm;
The sixth lens is made of D-ZK2L, the aperture range of the light transmission is 41mm-42mm, and the thickness range is 9mm-10mm;
the seventh lens is made of H-ZF11, the aperture range of the light transmission is 15mm-16mm, and the thickness range is 2mm-3mm;
the eighth lens is made of H-ZF7LAGT, the aperture range of the light transmission is 13mm-14mm, and the thickness range is 1mm-2mm;
the ninth lens is made of H-ZLAF D, the aperture range of the light transmission is 13mm-14mm, and the thickness range is 0mm-1mm;
the tenth lens is made of H-ZPK, the aperture range of the light transmission is 12mm-13mm, and the thickness range is 2mm-3mm;
the eleventh lens is made of H-BAF7, the aperture range of the light transmission is 15mm-16mm, and the thickness range is 3mm-4mm;
The twelfth lens is made of H-ZPK, the aperture range of the light passing through is 37mm-38mm, and the thickness range is 9mm-10mm;
The thirteenth lens is made of H-FK95N, the aperture range of the light transmission is 33mm-34mm, and the thickness range is 9mm-10mm;
the fourteenth lens is made of D-LAK5, the aperture range of the light transmission is 30mm-31mm, and the thickness range of the light transmission is 3mm-4mm.
6. The optical lens of claim 5, wherein an angle θ between the outgoing light from the third lens and the optical axis is less than 5 °.
7. The optical lens of claim 6, wherein the optical lens has a focal length of 20mm, an f-number of 4, a spectral range of 400nm to 1700nm, and a field angle of 72 °.
8. The optical lens of claim 7, wherein the aspherical surface profiles of the third lens, the fourth lens, the eleventh lens and the fourteenth lens are:
Wherein,
Z is the axial sagittal height of the aspheric surface in the Z direction;
r is the distance from the point on the aspherical surface to the optical axis;
c is the curvature of the fitting sphere, and the numerical value is the reciprocal of the curvature radius;
k is a fitting cone coefficient;
A. b, C are the 4 th, 6 th and 8 th order coefficients of the aspherical polynomial respectively.
9. An imaging apparatus comprising the optical lens according to any one of claims 1 to 8 and an imaging element for converting an optical image formed by the optical lens into an electric signal.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102789044A (en) * | 2012-08-08 | 2012-11-21 | 中国科学院长春光学精密机械与物理研究所 | Aspherical focal length-variable photoetching objective lens system |
| CN113261917A (en) * | 2021-05-18 | 2021-08-17 | 中国科学院长春光学精密机械与物理研究所 | Wide-field-of-view non-mydriatic wide-refraction compensation common-path infrared eye fundus imaging system |
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| US7116498B2 (en) * | 2004-03-12 | 2006-10-03 | Sony Corporation | Projection optical system and image projection apparatus |
| JP2015094883A (en) * | 2013-11-13 | 2015-05-18 | 富士フイルム株式会社 | Zoom lens and imaging device |
| JP6917538B2 (en) * | 2017-04-17 | 2021-08-11 | パナソニックＩｐマネジメント株式会社 | Imaging optical system, imaging device, camera system |
| CN216561185U (en) * | 2021-11-25 | 2022-05-17 | 南京信息工程大学 | Clear imaging lens of big relative aperture superelevation |
| CN216411728U (en) * | 2021-12-03 | 2022-04-29 | 深圳大学 | Wide-angle high-resolution machine vision lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102789044A (en) * | 2012-08-08 | 2012-11-21 | 中国科学院长春光学精密机械与物理研究所 | Aspherical focal length-variable photoetching objective lens system |
| CN113261917A (en) * | 2021-05-18 | 2021-08-17 | 中国科学院长春光学精密机械与物理研究所 | Wide-field-of-view non-mydriatic wide-refraction compensation common-path infrared eye fundus imaging system |
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