TWI224691B - Diffraction/refraction composite zoom lens imaging system - Google Patents

Abstract

The present invention is a diffraction/refraction composite zoom lens imaging system including at least one concave lens group, one first positive lens group, and one second positive lens group, where each group at least includes a diffraction surface and is symmetrical with the optical axis. By applying the optical characteristics of diffracting element, a designed profile of diffracting element is etched on the surface of the refracting element to eliminate possible optical and color aberrations without having to add any extra element.

Description

1224691

Page 6 V. Description of the invention (2) [Summary of the invention] The present invention is a kind of imaging system including a negative lens group, a compound zoom lens, and a single lens group. A positive lens group is formed for a negative optical power, and is a light source. Behind the negative lens group, it is the first component, and it is set in front of the lens. Second: the second lens group is also composed of a-lens. After the positive lens group, the two positive lens groups are located in the second component. ..., which is also positive, and is composed of a group of lenses and two groups of diffracted diffracted stripes to make A ^ slit body and score the low imaging system on the surface of the aspheric lens, weight and: Shoot 7 "pieces. The formation of such a large reduction of the diffraction surface is passed on, and the imaging effect is also good. The lens ΐ face is processed to scribe a diffraction pattern, and the lens serves to produce a diffraction effect. [Embodiment] The second figure is an embodiment of the present invention, where the direction 121 is the object direction 122 is the imaging direction. The first group of lenses is a negative lens group 201 which has a negative power and includes an object-oriented surface 2101, and an imaging-oriented surface 2 012 " hai imaging-oriented surface 2 012 is a diffractive surface . The diffractive surface is formed by processing and engraving a diffractive pattern on the lens surface, so that the lens can produce a diffractive effect. The second group lens 202 is a first positive lens group, and includes a diaphragm 2021 ′ for limiting the amount of light entering, an object-facing surface 2Q22 and a first imaging-facing surface 2 0 2 5 and a lens body 2023, in which the imaging direction The surface 20 25 is a diffractive surface, so that the second group lens 202 has a positive optical power, and the first lens

Page 7 1224691 V. Description of the invention (3) The image-facing surface 205 is a diffractive surface. The diffractive pattern is formed by processing and engraving on the lens surface, so that the lens can produce a diffractive effect. The third group lens 2 03 is a second positive lens group, and includes a lens body 2 0 33 and an object-facing surface 2032 and an imaging-facing surface 2035. The first imaging 2 surface 2 0 35 is a The diffractive surface is formed by processing a diffraction pattern on the surface of the lens, so that the lens can produce a diffractive effect. This third group lens 203 has a positive optical power. In addition, each surface of the three groups of lenses may be aspheric. The surface of the aspheric lens is engraved with diffraction stripes to make it a diffractive element based on diffraction properties. Each group of lenses includes a diffractive surface. Completely symmetrical light,: light = ㈣ can be ACRYLIC, glass or other agency / = 1 mirror even includes a fluorescein 'can be a color fluorescein. Bao / Si, 5 Hai filter 2 0 6 includes an object facing surface 2 0 6 2 disk # direction, 65: but the three groups of lens elements still need to meet the following: heart = so that the distance from the paid pupil to the imaging surface can be To avoid shading, the focus of the lens can accommodate the sacral lens element, and the longitudinal color image can be corrected. The zoom lens imaging system "Bei Che Fu Jia", which verifies the high imaging quality, is as follows: ° · 1 < Dw, / f3 <0.8; 0 · 5 〈D ti / f3 < 1 · 5; ft

〇 2 < B 1224691 ----- V. Description of the invention (4) ^ v2 '~ v1 < 40? :: Dwm is the lens at the maximum wide-angle state' shutter light === lens with the positive lens group closest to the image plane When the position of the surface is along the light wheel to = the telephoto state, the position of the shutter aperture is far away, and is the distance between the lens surfaces closest to the image plane :, b "to the back focus length of the second positive transmission, L And L are the focal lengths of the first positive ^ / max telephoto lens group, f is the hair lens group and the second the bin are read in steps, * 1 ^ long 々 configuration and the first-positive The equivalent of the lens group ::, V ... V2 "The expression of the net effect Abbe coefficient is the private number. Σ /, where Vp represents the Abbe index of the equivalent Abbe of the P group, and fpq is the The first lens group is the Qth lens element of the P group. The three lens groups are all τ: the focal length of 70 lenses. Then the negative lens group is designed. Plane, on the rear surface of the diffractive element, that is, the negative lens group, the imaging plane 2025 of the second positive lens group, and the 2 image plane 2012 and the first positive lens group; Imaging facing 2035 'Binary 2 Modei Fan model (weatt Model) and binary 2 model as shown in the third figure, this is ^: the aspherical coefficient of the diffraction element. ", Lens imaging system and handheld Mobile phone equipment Page 9 ^ 24691 V. Description of the invention (5) Coincidentally: 01 ::: In addition to a mobile phone device, it is better than a normal telephone. In the picture, the effect of the hand is compared with that of a conventional mobile phone, and the display surface can be included. The antenna 301 may include a two-key keyboard set of 3 ° 3 and a housing 304, and a more radiant / refractive composite Λ / 'system. To control the winding size. . In contrast, the parallel function, the ancient Tong 31 ° focusing function and the aperture lens are small, and the camera-type handheld mobile phone with the effect of 2 is not subject to this embodiment: Example of yoke: The lens is incorporated in the field of the present invention. Those skilled in the art can cover the equivalent structural changes or modifications of this embodiment H. Please refer to the fourth figure, which is the diffraction / refraction composite type of the invention. The zoom ^ is a picture of the present invention. The display 400 includes a case 4 (a combination of the n-disk and the second embodiment; 2 shots ::! 4), and a control group, which further includes i :::: 2? / T " " ^ " 410-^ The device is used to control the focusing function and aperture size of 41 °. Such a cross-focus lens master imaging system, a small device, and a small size, the image acquisition effect is not: Desirable: the existing conventional embodiment, the lens combination method is not the same The picture is-anyone who is familiar with the art in the present invention: field ^ embodiment = limitation, so structural changes or modifications are covered in this embodiment = equivalent knots implemented 1222691 The diagram briefly illustrates the first picture: The second view of the zoom lens of conventional technology: The third view of the compound zoom lens of the present invention The third view of an application embodiment of the present invention The fourth view of another application embodiment of the present invention [Illustration of drawing number] Conventional 101 first lens group 102 Second lens group 1021 Aperture 103 Second lens group 1031 Color chirp plate 1033 Imaging surface 121 Object direction 122 Imaging direction The present invention 201 Negative lens group 2011 Body-facing surface 2012 Imaging surface 202 First positive lens group 2 0 2 1 Aperture 2022 Object-facing surface 2 0 2 3 Lens body 2 025 First imaging surface 203 Second positive lens group 2 0 3 3 Lens body 2 0 3 2 object facing 2 0 3 5 first-imaging facing 206 filter 2 0 62 object facing 2 0 6 5 imaging facing 204 imaging 300 handheld mobile phone device 301 antenna 302 display panel 303 keypad group 304 Housing 305 Control

3 1 0 Diffraction / refraction type zoom lens imaging system 4 0 0 Monitor 401 housing

Page 11 1224691 Simple illustration of the diagram 4 0 2 Display panel 403 4 0 4 Mouth stabbing 4 0 5 4 1 0 Diffraction / refraction composite zoom lens imaging 40 6 Remote controller Support frame Button control group System

Claims (1)

The scope of the patent application is a kind of diffraction / refraction, > 1 lens group two-focus lens is made of ..., and is composed of a # lens formed by = lens group is a negative power; ~ wind ^ positive lens Group, located in the # ^ 秀 # 被 ^, the creator, and the optical power is 2 ·; is, the latter is the diffraction / refraction I e described in the first scope of the patent 4 patent scope, imaging The system, wherein the negative lens group is a diffraction surface of a negative focal length zoom lens and has a completely symmetrical optical axis. , ",, and at least 3. The winding imaging system described in item 1 of the scope of the patent application, the right side of the first positive lens fresh A-radiation type zoom lens" 1 "group is positive power, and It contains at least one diffractive surface, and is completely symmetrical with the optical axis, and a includes an aperture located on the object side, and the aperture is a person that restricts the amount of light. The lens group also includes a diffraction / refraction 1-in-1 zoom lens imaging system according to item 1 of the patent application Fanyuan, wherein the second positive lens group has a positive power and includes at least a diffraction surface, and Completely symmetrical optical axis. 5. The diffractive / refractive composite variable-angle mirror imaging system according to item 1 of the scope of the patent application, wherein the negative lens group, the first positive lens group, and the second positive lens group f are composed of spherical lenses. 6. The diffractive / refractive compound variable lens imaging system as described in item 1 of the scope of the patent application, wherein the negative lens group and the first positive lens group are replaced by aspherical lenses. composition. 7. Diffraction / refraction compound zoom lens as described in item 1 of the scope of patent application 1224691 VI. Patent application scope Imaging system, wherein the negative lens group and the first positive two positive lens group may be made of acrylic (ACRYTIC), * brother group and the second material. Po 螭, and other optics 8 · The diffraction / folding 4 imaging system as described in item 丨 of the patent application scope, which meets the following conditions:, 7 σ type zoom lens ° · 1 <^; / f3 <0.8; 〇 · 5 < Dti / f3 < 1. 5; 0.2 < Bft / f3 <0.4;! · 9 < f2 / fw <2.5; -10 v2f2) / fc V2li 25 40; where Dwm is a slave In the wide-angle state, the shutter well ^ to the lens closest to the image plane of the second positive lens group == along the optical axis Dti is the maximum telephoto state, the shutter aperture position is along the distance, the two positive lens group The back focal length of the lens surface closest to the image plane u to the telephoto state, f2 and f ^ ft, the focal length of the lens group and the second positive lens group 'fw-a positively configured focal length, Vl and% The equivalent Abbe coefficient of the lens group and the first at a wide angle. Human positive lens group 9. The diffractive / refractive composite zoom lens imaging system described in Item ST, the lens placement order can also be the first positive lens connected to the negative lens group, and finally connected to the second positive lens. Lens group. Brother ^ 10 • The diffraction / refraction composite type zoom lens imaging system as described in item 1 of the scope of patent application, wherein the negative lens group is a movable person. …, 1224691 VI. Application scope of patent 11. If the scope of patent application is the first head imaging system 'Where the 1 2. If the scope of patent application is the first head imaging system, of which 13. If the scope of patent is the first head imaging system, more After inclusion, it is used to filter colored light. 14. For example, the first head imaging system in the scope of patent application, and after inclusion, it is used to make the human eye visible. The diffractive / refractive composite zoom lens described in the item The first positive lens group is a movable person. The second positive lens group of the diffraction / refraction composite zoom lens described in the item is a fixed one. The diffractive / refractive composite zoom lens according to item 1 is a color filter located in the second positive lens group. The diffractive / refractive composite zoom lens according to item 2 is an imaging plate, and the image of the color filter is located. Focus on the imaging plate so that Page 15