CN208795920U - A kind of low distortion doubly telecentric camera lens - Google Patents
A kind of low distortion doubly telecentric camera lens Download PDFInfo
- Publication number
- CN208795920U CN208795920U CN201821694216.2U CN201821694216U CN208795920U CN 208795920 U CN208795920 U CN 208795920U CN 201821694216 U CN201821694216 U CN 201821694216U CN 208795920 U CN208795920 U CN 208795920U
- Authority
- CN
- China
- Prior art keywords
- lens
- convex lens
- convex
- concave
- range
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lenses (AREA)
Abstract
The utility model discloses a kind of low distortion doubly telecentric camera lenses, are related to optical design techniques field, are made of optical amplifier group, aperture diaphragm and imaging group；Optical amplifier group is made of four lens, four lens of optical amplifier group along optical path successively are as follows: plano-convex lens, concave-convex lens A, convex lens A and concavees lens A；Convex lens A and the bis- gluing units of concavees lens A are at gluing unit A；The convex surface of plano-convex lens is incidence surface, and the plane of plano-convex lens is light-emitting surface；The convex surface of concave-convex lens A is incidence surface, and the concave surface of concave-convex lens A is light-emitting surface；Aperture diaphragm is between optical amplifier group and imaging group；Imaging group is made of four lens, four lens of imaging group along optical path successively are as follows: concavees lens B, convex lens B, concave-convex lens B and convex lens C；Concavees lens B and the bis- gluing units of convex lens B are at gluing unit B；The concave surface of concavees lens B is incidence surface, and the concave surface of concave-convex lens B is incidence surface, and the convex surface of concave-convex lens B is light-emitting surface.
Description
Technical field
The utility model relates to optical design techniques fields, more particularly to a kind of low distortion doubly telecentric camera lens.
Background technique
Industrial lens have highly important effect in NI Vision Builder for Automated Inspection, with the development of technology, to industrial lens
It is required that more and more accurate.Long-range close small in order to overcome the problems, such as, doubly telecentric technology is come into being, and in certain object distance range, is put
Big multiplying power will not change with the variation of object distance, just not have very strict requirements to by the position of side element, with common lens
It compares, object can more accurately show the size of industrial component under doubly telecentric camera lens.
But in the actual process, can also it go out even if doubly telecentric technology solves the problems, such as near big and far smaller in light path design
It now distorts, this is the build-in attribute of lens.Doubly telecentric lens distortion rate currently on the market is mostly 0.1% or so, for wanting
The higher element of refinement degree has no idea to meet.
Utility model content
The main purpose of the utility model is to provide a kind of low distortion doubly telecentric camera lens, low the abnormal of doubly telecentric camera lens of distorting
Variability is less than 0.05%.
The technical solution adopted in the utility model is:
A kind of low distortion doubly telecentric camera lens, is made of optical amplifier group, aperture diaphragm and imaging group；The optical amplifier group
Optical axis, the central axis of aperture diaphragm and the optical axis of imaging group be respectively positioned on same straight line；
The optical amplifier group is made of four lens, four lens of optical amplifier group along optical path successively are as follows: plano-convex
Lens, concave-convex lens A, convex lens A and concavees lens A；Above-mentioned convex lens A and the bis- gluing units of concavees lens A are at gluing unit A；It is above-mentioned flat
The convex surface of convex lens is incidence surface, and the plane of plano-convex lens is light-emitting surface；The convex surface of the concave-convex lens A is incidence surface, described
The concave surface of concave-convex lens A is light-emitting surface；The range of curvature radius of the plano-convex lens is 20mm~30mm or 30mm~40mm；Institute
The range of curvature radius for stating the convex surface concave-convex lens A is 15mm~25mm, and the range of curvature radius of the concave surface the concave-convex lens A is
The range of curvature radius of 15mm~20mm, the convex lens A incidence surface are 25mm~35mm, the song of the convex lens A light-emitting surface
Rate radius is -25mm~-15mm, and the range of curvature radius of the concavees lens A incidence surface is -25mm~-15mm, described recessed
The range of curvature radius of lens A light-emitting surface is 18mm~22mm；Spacing range between the plano-convex lens and concave-convex lens A is
20mm~30mm, the spacing range between the concave-convex lens A and convex lens A is 15mm~20mm, the concavees lens A and aperture
Spacing range between diaphragm is 6mm~10mm；
The aperture diaphragm is between optical amplifier group and imaging group；
The imaging group is made of four lens, four lens of imaging group along optical path successively are as follows: concavees lens B, convex lens
Mirror B, concave-convex lens B and convex lens C；Above-mentioned concavees lens B and the bis- gluing units of convex lens B are at gluing unit B；The concavees lens B's is recessed
Face is incidence surface, and the concave surface of the concave-convex lens B is incidence surface, and the convex surface of the concave-convex lens B is light-emitting surface, the concavees lens
The range of curvature radius of B incidence surface is -22mm~-18mm；The range of curvature radius of the concavees lens B light-emitting surface be 15mm~
The range of curvature radius of 25mm, the convex lens B incidence surface are 15mm~25mm；The radius of curvature of the convex lens B light-emitting surface
Range is -35mm~-25mm, and the range of curvature radius of the concave-convex lens B incidence surface is -45mm~-35mm, described concave-convex saturating
The range of curvature radius of mirror B light-emitting surface is -30mm~-20mm, the range of curvature radius of the convex lens C incidence surface be 40mm~
The range of curvature radius of 50mm, the convex lens C light-emitting surface are -50mm~-40mm, between the concavees lens B and aperture diaphragm
Distance range be 6mm~10mm, the distance between the convex lens B and concave-convex lens B range are 15mm~20mm, described recessed
The distance between convex lens B and convex lens C range are 1mm~4mm.
Further, the concavees lens A and the midpoint concavees lens B are coated with light-sensitive emulsion.
Further, the diameter of the plano-convex lens is greater than the outer diameter of object.
Further: the refractive index of the convex lens A and concavees lens A is different.
Further: the refractive index of the concavees lens B and convex lens B is different.
The utility model has the advantage that and good effect are as follows: because distortion is the inherent characteristic of lens, can only reduce not
It can eliminate, convex lens converges light, and concavees lens make divergence of beam.In order to reduce distortion, when design, makes double glue of diaphragm two sides
It is combined as symmetrical structure, distortion can generate counteracting in this process；Gluing unit is also the gluing of convex lens and concavees lens, in glue
It is combined inside and also reduces the distortion of a part；The distance between each eyeglass is adjusted, optimizes integral layout, further decreases camera lens
Distortion.
Since gluing unit A in the utility model and gluing unit B are double glued, and by the glass system of two kinds of different refractivities
At the image enlargement ratio of imaging capable of being made not change in this way, and two kinds of glass combinations can cancel out each other by lens sheet
It distorts caused by body attribute；Click and enter light-sensitive emulsion in concavees lens, be in order to enable concavees lens to be bonded together with convex lens, and
Light-sensitive emulsion will not have an impact imaging；Concavees lens with convex lens be it is coaxial, this is injecting light and maximum limit when projecting
Counteracting lens of degree bring distortion effects itself.
Detailed description of the invention
Fig. 1 is the index path of the preferred embodiment in the utility model；
Specific embodiment
As shown in Figure 1, the utility model is a kind of low distortion doubly telecentric camera lens, by optical amplifier group, aperture diaphragm and at
As group composition；The optical axis of the optical axis of the optical amplifier group, the central axis of aperture diaphragm and imaging group is respectively positioned on same straight line；
The optical amplifier group is made of four lens, four lens of optical amplifier group along optical path successively are as follows: plano-convex
Lens, concave-convex lens A, convex lens A and concavees lens A；Above-mentioned convex lens A and the bis- gluing units of concavees lens A are at gluing unit A；It is above-mentioned flat
The convex surface of convex lens is incidence surface, and the plane of plano-convex lens is light-emitting surface；The convex surface of the concave-convex lens A is incidence surface, described
The concave surface of concave-convex lens A is light-emitting surface；The range of curvature radius of the plano-convex lens is 20mm~30mm or 30mm~40mm；Institute
The range of curvature radius for stating the convex surface concave-convex lens A is 15mm~25mm, and the range of curvature radius of the concave surface the concave-convex lens A is
The range of curvature radius of 15mm~20mm, the convex lens A incidence surface are 25mm~35mm, the song of the convex lens A light-emitting surface
Rate radius is -25mm~-15mm, and the range of curvature radius of the concavees lens A incidence surface is -25mm~-15mm, described recessed
The range of curvature radius of lens A light-emitting surface is 18mm~22mm；Spacing range between the plano-convex lens and concave-convex lens A is
20mm~30mm, the spacing range between the concave-convex lens A and convex lens A is 15mm~20mm, the concavees lens A and aperture
Spacing range between diaphragm is 6mm~10mm；
The aperture diaphragm is between optical amplifier group and imaging group；
The imaging group is made of four lens, four lens of imaging group along optical path successively are as follows: concavees lens B, convex lens
Mirror B, concave-convex lens B and convex lens C；Above-mentioned concavees lens B and the bis- gluing units of convex lens B are at gluing unit B；The concavees lens B's is recessed
Face is incidence surface, and the concave surface of the concave-convex lens B is incidence surface, and the convex surface of the concave-convex lens B is light-emitting surface, the concavees lens
The range of curvature radius of B incidence surface is -22mm~-18mm；The range of curvature radius of the concavees lens B light-emitting surface be 15mm~
The range of curvature radius of 25mm, the convex lens B incidence surface are 15mm~25mm；The radius of curvature of the convex lens B light-emitting surface
Range is -35mm~-25mm, and the range of curvature radius of the concave-convex lens B incidence surface is -45mm~-35mm, described concave-convex saturating
The range of curvature radius of mirror B light-emitting surface is -30mm~-20mm, the range of curvature radius of the convex lens C incidence surface be 40mm~
The range of curvature radius of 50mm, the convex lens C light-emitting surface are -50mm~-40mm, between the concavees lens B and aperture diaphragm
Distance range be 6mm~10mm, the distance between the convex lens B and concave-convex lens B range are 15mm~20mm, described recessed
The distance between convex lens B and convex lens C range are 1mm~4mm.
The concavees lens A and the midpoint concavees lens B are coated with light-sensitive emulsion.
The diameter of the plano-convex lens is greater than the outer diameter of object.
The refractive index of the convex lens A and concavees lens A is different.
The refractive index of the concavees lens B and convex lens B is different.
Above-mentioned technical proposal is broadly divided into two parts, and a part is optical amplifier group, and one is imaging group.The light
It learns amplification group to be made of four lens, the main function of preceding two panels lens is amplification, and first is plano-convex lens L1, the plano-convex
The diameter of lens is greater than the outer diameter of object, so that big visual field directional light is successfully entered optical system by big lens, makes subsequent small
Lens can smoothly receive light, and second lens is concave-convex lens L2, further change the route of light, allow to enter
Next light group, the three or four lens are convex lens L3 and concavees lens L4 bis- glued as gluing unit A；Optical amplifier group and imaging
Group is intermediate to place aperture diaphragm APE；Imaging group is equally formed by four lens combinations, the 5th six-element lens be concavees lens L5 with it is convex
Lens L6 is bis- glued as gluing unit B, and the 7th lens are similarly concave-convex lens L7, but placement is symmetrical with second lens, the
Eight lens are a convex lens L8.
The lens of gluing unit A and gluing unit B are formed by two panels lens combination, and the focus of two panels lens is straight in same
On line.
Convex lens in gluing unit A and gluing unit B is coaxial with concavees lens.
Convex lens midpoint and concavees lens midpoint in gluing unit A and gluing unit B are coated with light-sensitive emulsion.
It for gluing unit A and gluing unit B, is formed by one piece of convex lens and one piece of concavees lens gluing respectively, a part is former
Because being to make the imaging magnification of image not change, another part is to cancel out each other as caused by lens itself
Distortion effects.Gluing unit A and gluing unit B is formed by two pieces of lens combinations, and the focus of two pieces of lens is on the same line, most
Distortion is reduced in big degree.The concavees lens midpoint of gluing unit A and gluing unit B are coated with light-sensitive emulsion, be in order to make convex lens with
Concavees lens can be bonded together, and light-sensitive emulsion will not have an impact imaging.Entire light path system is in the left and right ends of diaphragm
It is in substantially symmetry status, this has cut down the distortion as caused by lens to the full extent, and the light that photoreceptor is received is most
Industrial component is restored in big degree.
Every experiment parameter of this preferred embodiment is as follows:
Refractive index:
The refractive index of plano-convex lens L1 and concave-convex lens A L2 are 1.5-1.6, convex lens AL3, concavees lens AL4, concavees lens
The refractive index of BL5 and convex lens BL6 are that the refractive index of 1.4-1.5, concave-convex lens BL7 and convex lens CL8 are 1.6-1.7.
Abbe number:
The Abbe number of plano-convex lens L1 is 40-50, concave-convex lens A L2, convex lens AL3, concavees lens AL4, concavees lens
The Abbe number of BL5 and convex lens BL6 are that the Abbe number of 30-40, concave-convex lens BL7 and convex lens CL8 are 50-60
Thickness:
The thickness of plano-convex lens L1 and concave-convex lens A L2 are 2.0-4.0 ㎜, the thickness of convex lens AL3 and convex lens BL6
Degree is 4.0-5.0 ㎜, concavees lens AL4 and concavees lens BL5 with a thickness of 4.0-6.0 ㎜, concave-convex lens BL7 with a thickness of 5.0-
7.0 ㎜, convex lens CL8 with a thickness of 6.0-10.0 ㎜.
The above is the specific example of the utility model, and is not construed as limitations of the present invention, all uses
The technical solution that equivalent or equivalent transformation is formed, still falls within the protection scope of the present utility model.
Claims (5)
1. a kind of low distortion doubly telecentric camera lens, is made of optical amplifier group, aperture diaphragm and imaging group；It is characterized by: described
The optical axis of the optical axis of optical amplifier group, the central axis of aperture diaphragm and imaging group is respectively positioned on same straight line；
The optical amplifier group is made of four lens, four lens of optical amplifier group along optical path successively are as follows: plano-convex lens,
Concave-convex lens A, convex lens A and concavees lens A；Above-mentioned convex lens A and the bis- gluing units of concavees lens A are at gluing unit A；Above-mentioned plano-convex lens
Convex surface be incidence surface, the planes of plano-convex lens is light-emitting surface；The convex surface of the concave-convex lens A is incidence surface, described concave-convex saturating
The concave surface of mirror A is light-emitting surface；The range of curvature radius of the plano-convex lens is 20mm~30mm or 30mm~40mm；The bumps
The range of curvature radius on the convex surface lens A is 15mm~25mm, the range of curvature radius of the concave surface the concave-convex lens A be 15mm~
The range of curvature radius of 20mm, the convex lens A incidence surface are 25mm~35mm, the radius of curvature of the convex lens A light-emitting surface
Range is -25mm~-15mm, and the range of curvature radius of the concavees lens A incidence surface is -25mm~-15mm, the concavees lens A
The range of curvature radius of light-emitting surface is 18mm~22mm；Spacing range between the plano-convex lens and concave-convex lens A is 20mm
~30mm, the spacing range between the concave-convex lens A and convex lens A is 15mm~20mm, the concavees lens A and aperture diaphragm
Between spacing range be 6mm~10mm；
The aperture diaphragm is between optical amplifier group and imaging group；
The imaging group is made of four lens, four lens of imaging group along optical path successively are as follows: concavees lens B, convex lens B,
Concave-convex lens B and convex lens C；Above-mentioned concavees lens B and the bis- gluing units of convex lens B are at gluing unit B；The concave surface of the concavees lens B is
Incidence surface, the concave surface of the concave-convex lens B are incidence surface, and the convex surface of the concave-convex lens B is light-emitting surface, and the concavees lens B enters
The range of curvature radius of smooth surface is -22mm~-18mm；The range of curvature radius of the concavees lens B light-emitting surface is 15mm~25mm,
The range of curvature radius of the convex lens B incidence surface is 15mm~25mm；The range of curvature radius of the convex lens B light-emitting surface
It is -35mm~-25mm, the range of curvature radius of the concave-convex lens B incidence surface is -45mm~-35mm, the concave-convex lens B
The range of curvature radius of light-emitting surface is -30mm~-20mm, the range of curvature radius of the convex lens C incidence surface be 40mm~
The range of curvature radius of 50mm, the convex lens C light-emitting surface are -50mm~-40mm, between the concavees lens B and aperture diaphragm
Distance range be 6mm~10mm, the distance between the convex lens B and concave-convex lens B range are 15mm~20mm, described recessed
The distance between convex lens B and convex lens C range are 1mm~4mm.
2. low distortion doubly telecentric camera lens according to claim 1, which is characterized in that the concavees lens A and the midpoint concavees lens B
It is coated with light-sensitive emulsion.
3. low distortion doubly telecentric camera lens according to claim 1, which is characterized in that the diameter of the plano-convex lens is greater than mesh
Mark the outer diameter of object.
4. low distortion doubly telecentric camera lens according to claim 1-3, which is characterized in that the convex lens A and recessed
The refractive index of lens A is different.
5. low distortion doubly telecentric camera lens according to claim 1-3, which is characterized in that the concavees lens B and convex
The refractive index of lens B is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821694216.2U CN208795920U (en) | 2018-10-18 | 2018-10-18 | A kind of low distortion doubly telecentric camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821694216.2U CN208795920U (en) | 2018-10-18 | 2018-10-18 | A kind of low distortion doubly telecentric camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208795920U true CN208795920U (en) | 2019-04-26 |
Family
ID=66212055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821694216.2U Active CN208795920U (en) | 2018-10-18 | 2018-10-18 | A kind of low distortion doubly telecentric camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208795920U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221415A (en) * | 2019-07-08 | 2019-09-10 | 桂林弗克斯光电仪器有限公司 | Big visual field double telecentric optical system |
| CN113433680A (en) * | 2021-07-14 | 2021-09-24 | 光虎光电科技(天津)有限公司 | Double-telecentric lens |
-
2018
- 2018-10-18 CN CN201821694216.2U patent/CN208795920U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221415A (en) * | 2019-07-08 | 2019-09-10 | 桂林弗克斯光电仪器有限公司 | Big visual field double telecentric optical system |
| CN110221415B (en) * | 2019-07-08 | 2024-03-29 | 桂林弗克斯光电仪器有限公司 | Large-field double telecentric optical system |
| CN113433680A (en) * | 2021-07-14 | 2021-09-24 | 光虎光电科技(天津)有限公司 | Double-telecentric lens |
| CN113433680B (en) * | 2021-07-14 | 2022-05-17 | 光虎光电科技(天津)有限公司 | Double-telecentric lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105372792B (en) | Image capturing optical lens assembly, image capturing device and electronic device | |
| CN110058387A (en) | A kind of doubly telecentric projection lens and optical projection system | |
| CN208795920U (en) | A kind of low distortion doubly telecentric camera lens | |
| TW201527790A (en) | Optical imaging lens and electronic device comprising the same | |
| CN103513409A (en) | Large visual field optical imaging method for guided missile detection and identification and system thereof | |
| CN103323934B (en) | Imaging lens assembly | |
| CN107436482B (en) | Turning type telescopic fixed-focus lens and camera device | |
| CN105759543A (en) | Projection optical system and projection device | |
| CN109557640A (en) | A kind of imaging lens and electronic equipment | |
| CN206657132U (en) | A kind of aspherical fish eye lens | |
| CN101216597A (en) | Refraction and reflection projection optical system | |
| CN106908938A (en) | A kind of aspherical fish eye lens | |
| CN109709665A (en) | A kind of doubly telecentric camera lens and optical system | |
| CN208334759U (en) | A kind of ultrashort full HD projection lens of coke | |
| CN206960768U (en) | A kind of image bilateral telecentric optical system of ultra-large vision field | |
| TW201723576A (en) | Four-piece infrared single wavelength lens assembly | |
| CN113433680B (en) | Double-telecentric lens | |
| CN209373239U (en) | A kind of doubly telecentric camera lens | |
| CN105759405A (en) | Optical system with increased field angle, and projection lens | |
| CN109031587A (en) | Optical lens | |
| CN103376539B (en) | A kind of refraction-reflection projection objective | |
| CN203444170U (en) | Optical collimation system of infrared imaging target simulator | |
| CN206460208U (en) | A kind of image bilateral telecentric optical system | |
| CN102455485B (en) | Wide-angle adapter lens and optical system applied thereby | |
| CN216351487U (en) | Coaxial telecentric lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |