CN108267848A - A kind of doubly telecentric optical imaging system of high telecentricity - Google Patents
A kind of doubly telecentric optical imaging system of high telecentricity Download PDFInfo
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- CN108267848A CN108267848A CN201711376574.9A CN201711376574A CN108267848A CN 108267848 A CN108267848 A CN 108267848A CN 201711376574 A CN201711376574 A CN 201711376574A CN 108267848 A CN108267848 A CN 108267848A
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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
- G02B13/22—Telecentric objectives or lens systems
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Abstract
This application discloses a kind of doubly telecentric optical imaging systems of high telecentricity, are disposed with preceding group of increment system, rear group biotar lens and image planes CCD/CMOS, the optical system from object plane side to image planes side along optical axis direction and meet：0.1 ° of 1 ＜ of △；0.1 ° of 2 ＜ of △；Wherein：△ 1 is to enter the chief ray of each visual field of the optical system and the angle of optical axis from object plane side；△ 2 is the chief ray of each visual field and the angle of optical axis from the system exit to image planes CCD/CMOS.The optical system of the application effectively improves measurement accuracy of detection, anamorphose error caused by the movement of reduction system, the double requirements of object space telecentricity and image space telecentricity have been taken into account, can be widely used in the related high-tech type integration field such as machine vision, industrial detection, wisdom logistics, system integration.
Description
Technical field
This application involves a kind of optical system, more particularly to a kind of doubly telecentric optical imaging system of high telecentricity.
Background technology
With the increasingly quickening that current industry is integrated, more and more equipment are all continued to develop toward ultrahigh precision direction；Respectively
The accurate order of accuarcy of parts needs corresponding machine detection, it is ensured that the quality of parts；Thus the intelligent superelevation extended
Precision detecting system just arises, and market size is increasing.A subsystem needed for ultrahigh precision detecting system
System is exactly optical system；It includes luminous source system, optical imaging system etc.；And involved by this patent be exactly it is therein into
As system, i.e. optical lens.The detection imaging lens that most of producers release on the market at present can only meet object space telecentricity or
The one of both of image space telecentricity, it is impossible to accomplish that the two is taken into account, meanwhile, telecentricity is larger；To the parts shadow of scanning/detection
As larger pattern distortion can be generated.
Invention content
The purpose of the present invention is to provide a kind of doubly telecentric optical imaging system of high telecentricity, to overcome in the prior art
Deficiency.
To achieve the above object, the present invention provides following technical solution：
The embodiment of the present application discloses a kind of doubly telecentric optical imaging system of high telecentricity, along optical axis direction from object plane side
Preceding group of increment system, rear group biotar lens and image planes CCD/CMOS are disposed with to image planes side, it is described
Optical system meets following condition formulae：
【Conditional 1】
0.1 ° of 1 ＜ of △；
【Conditional 2】
0.1 ° of 2 ＜ of △；
Wherein：△ 1 is to enter the chief ray of each visual field of the optical system and the angle of optical axis from object plane side；
△ 2 is the chief ray of each visual field and the angle of optical axis from the system exit to image planes CCD/CMOS.
Preferably, the optical interval of the preceding group increment system and rear group biotar lens is more than the small 80mm of 75mm.
Preferably, the optical system meets following condition formulae：
【Conditional 3】
320 ＜ fIncrease＜ 350；
Wherein：fIncreaseOptical focal length for the increment system.
Preferably, it is saturating along optical axis direction to be disposed with the first lens, the second lens and third for group increment system before described
Mirror；Group biotar lens is disposed with the 4th lens, the 5th lens, the 6th lens, diaphragm, the 7th along optical axis direction after described
Lens, the 8th lens and the 9th lens.
Further, the 5th lens and the 6th lens form the first balsaming lens, the 7th lens and described the
Eight lens form the second balsaming lens, and the optical system meets following condition formulae：
【Conditional 4】
fZ1＜ 0；
【Conditional 5】
fZ2＞ 0；
【Conditional 6】
- 0.35 ＜ fZ1/fZ2＜ -0.32；
Wherein：fZ1Optical focal length for the first balsaming lens；fZ2Optical focal length for the second balsaming lens.
Preferably, first lens be lenticular positive lens, second lens be falcate positive lens, the third
Lens are negative meniscus, and the 4th lens are falcate positive lens, and the 5th lens are lenticular positive lens, described
6th lens are double concave negative lens, and the 7th lens are double concave negative lens, and the 8th lens are lenticular positive lens,
9th lens are biconvex positive lens.
Preferably, it is that the radius of curvature on the left and right two sides of first lens, the 5th lens and the 8th lens is equal.
Preferably, the 9th lens to the airspace of image planes CCD/CMOS be 13.55mm.
Preferably, the optical interval between the first lens and the second lens is 1.0mm, second lens and third lens
Between optical interval for 25.0mm, the optical interval between the third lens and the 4th lens is 77.3mm, the described 4th
Optical interval between 4 and the 5th lens of lens is 1.2mm, and the optical interval between the 6th lens and the 7th lens is
5.2mm, the optical interval between the 8th lens and the 9th lens are 0.55mm.
Preferably, the optical system meets：
First lens：270≤R1≤275-275≤R2≤- 272,10≤D≤12,220≤f≤222；
Second lens：75≤R1≤77 140≤R2≤160 10≤D≤12,220≤f≤222；
Third lens：250≤R1≤260 60≤R2≤63 5.5≤D≤6.4, -185≤f≤- 180；
4th lens：12≤R1≤14 15≤R2≤16 2.5≤D≤3.2,70≤f≤75；
5th lens：14≤R1≤15-15≤R2≤- 14,3.0≤D≤3.6,25≤f≤27；
6th lens：5≤the R2 of -15≤R1≤- 14≤6 3.5≤D≤4.0, -8≤f≤- 7；
7th lens：11≤the R2 of -42≤R1≤- 40≤12 5.5≤D≤6.0, -27≤f≤- 25；
8th lens：11≤R1≤12-12≤R2≤- 11,7≤D≤8,31≤f≤33；
9th lens：27≤R1≤29-27≤R2≤- 29,1.0≤D≤1.2,18≤f≤20；
Wherein：R1, R2 are the radius of curvature value on lens two sides；D is the center thickness value of lens；F is that the optics of lens is burnt
Away from.
Compared with prior art, the optical system of the application effectively improves measurement accuracy of detection, reduces system movement institute band
The anamorphose error come, has taken into account the double requirements of object space telecentricity and image space telecentricity, can be widely used in machine vision, industry
The correlation high-tech type integration field such as detection, wisdom logistics, system integration.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or it will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the doubly telecentric optical imaging system schematic diagram of high telecentricity in the specific embodiment of the invention
Fig. 2 is telecentricity/non-telecentricity difference of the doubly telecentric optical imaging system of high telecentricity in the specific embodiment of the invention
Schematic diagram
Fig. 3 is the doubly telecentric optical imaging system curvature of field of high telecentricity and distortion schematic diagram in the specific embodiment of the invention
Fig. 4 is the doubly telecentric optical imaging system chief ray angle schematic diagram of high telecentricity in the specific embodiment of the invention
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, detailed retouch is carried out to the technical solution in the embodiment of the present invention
It states, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, shall fall within the protection scope of the present invention.
A kind of doubly telecentric optical imaging system of high telecentricity with reference to shown in Fig. 1, along optical axis direction from object plane side to picture
Face side is disposed with preceding group of increment system, rear group biotar lens and image planes CCD/CMOS, optical system
Meet following condition formulae：
【Conditional 1】
0.1 ° of 1 ＜ of △；
【Conditional 2】
0.1 ° of 2 ＜ of △；
Wherein：△ 1 is to enter the chief ray of each visual field of optical system and the angle of optical axis from object plane side；
△ 2 is the chief ray of each visual field and the angle of optical axis from system exit to image planes CCD/CMOS.
Preferably, the optical interval of preceding group of increment system and rear group biotar lens is more than the small 80mm of 75mm.
Preferably, optical system meets following condition formulae：
【Conditional 3】
320 ＜ fIncrease＜ 350；
Wherein：fIncreaseOptical focal length for increment system.
Preferably, preceding group of increment system is disposed with the first lens 1, the second lens 2 and third lens along optical axis direction
3；Group biotar lens is disposed with the 4th lens 4, the 5th lens 5, the 6th lens 6, diaphragm, the 7th thoroughly along optical axis direction afterwards
Mirror 7, the 8th lens 8 and the 9th lens 9.
Further, the 5th lens 5 and the 6th lens 6 form 8 groups of the first balsaming lens, the 7th lens 7 and the 8th lens
Into the second balsaming lens, optical system meets following condition formulae：
【Conditional 4】
fZ1＜ 0；
【Conditional 5】
fZ2＞ 0；
【Conditional 6】
- 0.35 ＜ fZ1/fZ2＜ -0.32；
Wherein：fZ1Optical focal length for the first balsaming lens；fZ2Optical focal length for the second balsaming lens.
Preferably, the first lens 1 are lenticular positive lens, and the second lens 2 are falcate positive lens, and third lens 3 are curved
Month shape negative lens, the 4th lens 4 are falcate positive lens, and the 5th lens 5 are lenticular positive lens, and the 6th lens 6 are double concave
Negative lens, the 7th lens 7 are double concave negative lens, and the 8th lens 8 are lenticular positive lens, and the 9th lens 9 are just saturating for biconvex
Mirror.
Preferably, it is that the radius of curvature on the left and right two sides of the first lens 1, the 5th lens 5 and the 8th lens 8 is equal.
In the technical scheme, the radius of curvature phase on the left and right two sides of the first lens 1, the 5th lens 5 and the 8th lens 8
Deng convenient for the cold working of optical lens, can also reducing processing cost.
Preferably, the airspace that the 9th lens 9 arrive image planes CCD/CMOS is 13.55mm.
Preferably, the optical interval between the first lens 1 and the second lens 2 is 1.0mm, the second lens 2 and third lens 3
Between optical interval for 25.0mm, the optical interval between 3 and the 4th lens 4 of third lens is 77.3mm, the 4th lens 4 with
Optical interval between 5th lens 5 is 1.2mm, and the optical interval between the 6th lens 6 and the 7th lens 7 is 5.2mm, the 8th
Optical interval between 8 and the 9th lens 9 of lens is 0.55mm.
Preferably, optical system meets：
First lens 1：270≤R1≤275-275≤R2≤- 272,10≤D≤12,220≤f≤222；
Second lens 2：75≤R1≤77 140≤R2≤160 10≤D≤12,220≤f≤222；
Third lens 3：250≤R1≤260 60≤R2≤63 5.5≤D≤6.4, -185≤f≤- 180；
4th lens 4：12≤R1≤14 15≤R2≤16 2.5≤D≤3.2,70≤f≤75；
5th lens 5：14≤R1≤15-15≤R2≤- 14,3.0≤D≤3.6,25≤f≤27；
6th lens 6：5≤the R2 of -15≤R1≤- 14≤6 3.5≤D≤4.0, -8≤f≤- 7；
7th lens 7：11≤the R2 of -42≤R1≤- 40≤12 5.5≤D≤6.0, -27≤f≤- 25；
8th lens 8：11≤R1≤12-12≤R2≤- 11,7≤D≤8,31≤f≤33；
9th lens 9：27≤R1≤29-27≤R2≤- 29,1.0≤D≤1.2,18≤f≤20；
Wherein：R1, R2 are the radius of curvature value on lens two sides；D is the center thickness value of lens；F is that the optics of lens is burnt
Away from.
In the technical scheme, by the optical combination by said lens can system object space, image space telecentricity
Degree is less than 0.1 ° hereinafter, the angle of the chief ray of i.e. each visual field incident beam and optical axis, the key light of each visual field outgoing beam
The angle of line and optical axis is respectively less than 0.1 °
Fig. 2, Fig. 3 and Fig. 4 show the double telecentric optical system telecentricity of high telecentricity in the specific embodiment of the invention/non-
Telecentricity difference schematic diagram, the curvature of field and distortion schematic diagram and chief ray angle schematic diagram.
Whether telecentric system and non-telecentric system, difference are visual field chief ray and optical axis close to parallel；Non- telecentricity system
System can change the size and location of the current object of Scanning Detction when moving up and down, and telecentric system will not then change and
It is zero distortion, measurement accuracy of detection can be effectively improved.
In conclusion the optical system of the application effectively improves measurement accuracy of detection, reduce and scheme caused by system movement
Distortion of image error has taken into account the double requirements of object space telecentricity and image space telecentricity, can be widely used in machine vision, industrial detection,
The correlation high-tech type integration field such as wisdom logistics, system integration.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
Also there are other identical elements in process, method, article or equipment including the element.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of the application principle is not departed from, several improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (10)
1. a kind of doubly telecentric optical imaging system of high telecentricity, it is characterised in that：Along optical axis direction from object plane side to image planes
Side is disposed with preceding group of increment system, rear group biotar lens and image planes CCD/CMOS, the optical system
System meets following condition formulae：
【Conditional 1】
0.1 ° of 1 ＜ of △；
【Conditional 2】
0.1 ° of 2 ＜ of △；
Wherein：△ 1 is to enter the chief ray of each visual field of the optical system and the angle of optical axis from object plane side；
△ 2 is the chief ray of each visual field and the angle of optical axis from the system exit to image planes CCD/CMOS.
2. a kind of doubly telecentric optical imaging system of high telecentricity according to claim 1, it is characterised in that：Described preceding group
The optical interval of increment system and rear group biotar lens is more than the small 80mm of 75mm.
3. a kind of doubly telecentric optical imaging system of high telecentricity according to claim 1, it is characterised in that：The optics
System meets following condition formulae：
【Conditional 3】
320 ＜ fIncrease＜ 350；
Wherein：fIncreaseOptical focal length for the increment system.
4. a kind of doubly telecentric optical imaging system of high telecentricity according to claim 1, it is characterised in that：Described preceding group
Increment system is disposed with the first lens, the second lens and third lens along optical axis direction；Group biotar lens edge after described
Optical axis direction is disposed with the 4th lens, the 5th lens, the 6th lens, diaphragm, the 7th lens, the 8th lens and the 9th thoroughly
Mirror.
5. a kind of doubly telecentric optical imaging system of high telecentricity according to claim 4, it is characterised in that：Described 5th
Lens and the 6th lens form the first balsaming lens, and the 7th lens and the 8th lens form the second balsaming lens, institute
It states optical system and meets following condition formulae：
【Conditional 4】
fZ1＜ 0；
【Conditional 5】
fZ2＞ 0；
【Conditional 6】
- 0.35 ＜ fZ1/fZ2＜ -0.32；
Wherein：fZ1Optical focal length for the first balsaming lens；fZ2Optical focal length for the second balsaming lens.
6. a kind of doubly telecentric optical imaging system of high telecentricity according to claim 4, it is characterised in that：Described first
Lens are lenticular positive lens, and second lens are falcate positive lens, and the third lens are negative meniscus, described
4th lens are falcate positive lens, and the 5th lens are lenticular positive lens, and the 6th lens are double concave negative lens,
7th lens be double concave negative lens, the 8th lens be lenticular positive lens, the 9th lens for biconvex just
Lens.
7. the doubly telecentric optical imaging system of a kind of high telecentricity according to claim 4, it is characterised in that described first
The radius of curvature on the left and right two sides of lens, the 5th lens and the 8th lens is equal.
8. the doubly telecentric optical imaging system of a kind of high telecentricity according to claim 4, it is characterised in that the described 9th
Lens to the airspace of image planes CCD/CMOS be 13.55mm.
A kind of 9. doubly telecentric optical imaging system of high telecentricity according to claim 4, it is characterised in that the first lens
Optical interval between the second lens is 1.0mm, and the optical interval between second lens and third lens is 25.0mm,
Optical interval between the third lens and the 4th lens is 77.3mm, the light between the 4th lens 4 and the 5th lens
1.2mm is divided between, the optical interval between the 6th lens and the 7th lens be 5.2mm, the 8th lens and the 9th
Optical interval between lens is 0.55mm.
A kind of 10. doubly telecentric optical imaging system of high telecentricity according to claim 4, it is characterised in that the optics
System meets：
First lens：270≤R1≤275-275≤R2≤- 272,10≤D≤12,220≤f≤222；
Second lens：75≤R1≤77 140≤R2≤160 10≤D≤12,220≤f≤222；
Third lens：250≤R1≤260 60≤R2≤63 5.5≤D≤6.4, -185≤f≤- 180；
4th lens：12≤R1≤14 15≤R2≤16 2.5≤D≤3.2,70≤f≤75；
5th lens：14≤R1≤15-15≤R2≤- 14,3.0≤D≤3.6,25≤f≤27；
6th lens：5≤the R2 of -15≤R1≤- 14≤6 3.5≤D≤4.0, -8≤f≤- 7；
7th lens：11≤the R2 of -42≤R1≤- 40≤12 5.5≤D≤6.0, -27≤f≤- 25；
8th lens：11≤R1≤12-12≤R2≤- 11,7≤D≤8,31≤f≤33；
9th lens：27≤R1≤29-27≤R2≤- 29,1.0≤D≤1.2,18≤f≤20；
Wherein：R1, R2 are the radius of curvature value on lens two sides；D is the center thickness value of lens；F is the optical focal length of lens.
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| CN201711376574.9A CN108267848A (en) | 2017-12-19 | 2017-12-19 | A kind of doubly telecentric optical imaging system of high telecentricity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112764196A (en) * | 2021-01-08 | 2021-05-07 | 广景视睿科技（深圳）有限公司 | Double-telecentric projection lens and head-up display device of automobile |
| CN113589485A (en) * | 2021-08-05 | 2021-11-02 | 南京波长光电科技股份有限公司 | Double-telecentric exposure lens |
| WO2022052267A1 (en) * | 2020-09-09 | 2022-03-17 | 诚瑞光学(深圳)有限公司 | Camera optical lens |
| CN116482844A (en) * | 2023-02-08 | 2023-07-25 | 广州长步道光学科技有限公司 | High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens |
-
2017
- 2017-12-19 CN CN201711376574.9A patent/CN108267848A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022052267A1 (en) * | 2020-09-09 | 2022-03-17 | 诚瑞光学(深圳)有限公司 | Camera optical lens |
| CN112764196A (en) * | 2021-01-08 | 2021-05-07 | 广景视睿科技（深圳）有限公司 | Double-telecentric projection lens and head-up display device of automobile |
| CN113589485A (en) * | 2021-08-05 | 2021-11-02 | 南京波长光电科技股份有限公司 | Double-telecentric exposure lens |
| CN116482844A (en) * | 2023-02-08 | 2023-07-25 | 广州长步道光学科技有限公司 | High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens |
| CN116482844B (en) * | 2023-02-08 | 2024-01-09 | 广州长步道光学科技有限公司 | High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens |
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