CN106646827A - Objective image surface inclination optical system - Google Patents
Objective image surface inclination optical system Download PDFInfo
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- CN106646827A CN106646827A CN201611149368.XA CN201611149368A CN106646827A CN 106646827 A CN106646827 A CN 106646827A CN 201611149368 A CN201611149368 A CN 201611149368A CN 106646827 A CN106646827 A CN 106646827A
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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
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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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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- Optics & Photonics (AREA)
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Abstract
The present invention provides an objective image surface inclination optical system. The lens comprises a positive biconvex first lens, a positive meniscus second lens, a negative biconcave third lens and a positive biconvex fourth lens arranged in order from an object side to an image side. A diaphragm is arranged between the third lens and the fourth lens, and the first lens is close to a shot object. -4.96<h1*f1/f<-3.26, -4.26<h2*f2/f<-3.84, 0.2<h3*f3/f<0.4, and 0.001< h4*f4/f<0.01, wherein f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f is the total focal length of the system. Based on the premise of ensuring the image quality, the objective image surface inclination optical system reasonably matches the linear expansion coefficients of glass materials and reasonably distributes the positive and negative focal power of the glass optical lenses to have good analysis quality in the temperature from -10 DEG C to -60 DEG C so as to improve the lens view field competitiveness.
Description
Technical field
The present invention relates to a kind of image face oblique optical system.
Background technology
In laser ranging optical system, if incident illumination is perpendicular to subject, only one of which is accurately focused position, remaining
Position is in different degrees of out-of-focus appearance, so as to cause diffusion of point image, makes measurement produce larger error.To improve system
Certainty of measurement, using image face oblique optical system, subject and photoelectric detector and the angle of optical axis meet it is husky she
Mu Pufuluge conditions, make each luminous point can be in photodetector imaging clearly, so as to reduce measurement error.Thing, image planes are inclined
Tiltedly camera lens can be used for laser triangulation range finding.
But, existing four-piece type optical system is applied to intake perpendicular to optical axis object, such as Chinese patent literature number more
CN102636863A disclosed a kind of infrared double-waveband confocal optical system and Chinese patent literature on 08 15th, 2012
Number CN102478701 disclosed a kind of optical lens group on 05 30th, 2012, and afterwards Jiao falls short of, it is impossible to incline for absorbing
Object, and may not apply to low temperature environment, it is impossible to solve the problems, such as that high/low temperature parses focus drifting.
The content of the invention
The purpose of the present invention aims to provide a kind of image face at -10 DEG C～-60 DEG C with preferably parsing quality and inclines
Optical system, to overcome weak point of the prior art.
By a kind of image face oblique optical system of this purpose design, including eyeglass, its architectural feature is the eyeglass bag
The 4th lens of the first lens, the second lens of positive bent moon, the 3rd lens of negative concave-concave and the positive biconvex of positive biconvex are included, diaphragm sets
Put between the 3rd lens and the 4th lens, the first lens are near subject；It meets relational expression：
-4.96<h1*f1/f<-3.26；
-4.26<h2*f2/f<-3.84；
0.2<h3*f3/f<0.4；
0.001<h4*f4/f<0.01；
Wherein, f1 is the focal length of the first lens, and f2 is the focal length of the second lens, and f3 is the focal length of the 3rd lens, and f4 is
The focal length of four lens, f is the total focal length of system, h1For height of incidence of the chief ray on the first lens, h2It is chief ray second
Height of incidence on lens, h3For height of incidence of the chief ray on the 3rd lens, h4For incidence of the chief ray on the 4th lens
Highly.
Above-mentioned technical scheme is conducive to the balance of system aberration as a result of positive negative power reasonable distribution, improves
The image quality of system.Organized after negative using front group and positive counter take the photograph remote structure, it is ensured that system has longer rear Jiao.
Further, first lens, the second lens and the 4th lens are υ from the Abbe number of glass materiald1, described
Three lens are υ from the Abbe number of glass materiald2, it meets relational expression：
58.61 ＜ υd1＜ 63.61,
31.184 ＜ υd2＜ 32.179.
Above-mentioned technical scheme is conducive to the correction of system aberration due to differing larger glass material from Abbe number.
Further, the material heat differential coefficient of first lens, the second lens, the 3rd lens and the 4th lens is followed successively by
ki, j=1,2,3,4；It meets relational expression：
-1564×10-6＜ h1f1k1＜ -1020 × 10-6,
-1300×10-6＜ h2f2k2＜ -1240 × 10-6,
18.48×10-6＜ h3f3k3＜ 33.05 × 10-6,
0.5×10-6＜ h4f4k4＜ 2.3 × 10-6。
Further, perpendicular to optical axis, the inclination angle of subject, detector and optical axis meets the principal plane of the system：Wherein, θ is the angle between object plane and optical axis,For the angle between image planes and optical axis, β is enlargement ratio
For between the system object being shot and system optical axis formed angle, β be equal to or more than 35 °, its Electro-Optical Sensor Set with
Inclination angle is equal to or more than 62 ° between optical axis.
With the development of science and technology, the use environment of optical system has not merely been confined to normal temperature state, and the present invention is using complete
The design structure of glass lens, using 4 spherical lenses, on the premise of ensureing as matter, by Proper Match glass material
Linear expansion coefficient and the positive negative power of reasonable distribution glass lens, solve the problems, such as that high/low temperature parses focus drifting so as to
Still there is parsing quality well at -10 DEG C～-60 DEG C, improve camera lens visual field competitiveness.
Description of the drawings
Fig. 1 is the lens schematic diagram of one embodiment of the invention.
Fig. 2 is 20 DEG C of point range figures of the first case study on implementation of the invention.
Fig. 3 be the first case study on implementation of the invention be in -10 DEG C when point range figure.
Fig. 4 is the point range figure that the first case study on implementation of the invention is in 60 DEG C.
Fig. 5 is the curvature of field distortion figure of the first case study on implementation of the invention.
Fig. 6 is 20 DEG C of point range figures of the second case study on implementation of the invention.
Fig. 7 be the second case study on implementation of the invention be in -10 DEG C when point range figure.
Fig. 8 be the second case study on implementation of the invention be in 60 DEG C when point range figure.
Fig. 9 is the curvature of field distortion figure of the second case study on implementation of the invention.
Figure 10 is 20 DEG C of point range figures of the 3rd case study on implementation of the invention.
Figure 11 is point range figure when 3rd case study on implementation of the invention is in -10 DEG C.
Figure 12 is point range figure when 3rd case study on implementation of the invention is in 60 DEG C.
Figure 13 is the curvature of field distortion figure of the 3rd case study on implementation of the invention.
In figure：L1 is the first lens, and L2 is the second lens, and L3 is the 3rd lens, and L4 is the 4th lens, and FILTER is filter
Mirror, OBJECT is thing side, and IMAGE is image side.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
First embodiment
Referring to Fig. 1-Fig. 5, this image face oblique optical system, including eyeglass, the eyeglass include from the object side to image side according to
Secondary the first lens L1 for being provided with positive biconvex, the second lens L2 in positive bent moon, the 3rd lens L3 in negative concave-concave and positive biconvex
The 4th lens L4, diaphragm is arranged between the 3rd lens L3 and the 4th lens L4, and the first lens L1 is near subject；It is expired
Sufficient relational expression：
- 4.96 ＜ h1*f1/ f ＜ -3.26；
- 4.26 ＜ h2*f2/ f ＜ -3.84；
0.2 ＜ h3*f3/ f ＜ 0.4；
0.001 ＜ h4*f4/ f ＜ 0.01；
Wherein, f1 is the focal length of the first lens L1, and f2 is the focal length of the second lens L2, and f3 is the focal length of the 3rd lens L3,
F4 is the focal length of the 4th lens L4, and f is the total focal length of system, h1For height of incidence of the chief ray on the first lens L1, h2Based on
Height of incidence of the light on the second lens L2, h3For height of incidence of the chief ray on the 3rd lens L3, h4It is chief ray
Height of incidence on four lens L4.
The first lens L1, the second lens L2 and the 4th lens L4 are υ from the Abbe number of glass materiald1, described
Three lens L3 are υ from the Abbe number of glass materiald2, have following relationship to set up
58.61 ＜ υd1＜ 63.61,
31.184 ＜ υd2＜ 32.179.
The first lens L1, the second lens L2, the material heat differential coefficient of the 3rd lens L3 and the 4th lens L4 are followed successively by
ki, j=1,2,3,4；There is following relationship to set up：
-1564×10-6＜ h1f1k1＜ -1020 × 10-6,
-1300×10-6＜ h2f2k2＜ -1240 × 10-6,
18.48×10-6＜ h3f3k3＜ 33.05 × 10-6,
0.5×10-6＜ h4f4k4＜ 2.3 × 10-6。
The principal plane of the system meets perpendicular to optical axis, the inclination angle of subject, detector and optical axis
Wherein, θ is the angle between object plane and optical axis,For the angle between image planes and optical axis, β
It is the angle formed between the system object being shot and system optical axis for enlargement ratio, β is equal to or more than 35 °, its photoelectricity
Inclination angle is equal to or more than 62 ° between detection device and optical axis.
In the present embodiment, the total focal length f=23.11mm of image face oblique optical system, aperture F#=3.2,2y=
7.6mm；Wherein, y is half image height.
Optical system parameter see the table below it is shown, wherein, S1 for filter FILTER front surface, S2 be filter FILTER after
Surface, S3 is the front surface of the first lens L1, and S4 is the rear surface of the first lens L1, and S5 is the front surface of the second lens L2, S6
For the rear surface of the second lens L2, S7 is the front surface of the 3rd lens L3, and S8 is the rear surface of the 3rd lens L3, and Stop is camera lens
Diaphragm, S10 is the front surface of the 4th lens L4, and S11 is the rear surface of the 4th lens L4, as shown in Figure 1.
Second embodiment
Referring to Fig. 6-Fig. 9, in the present embodiment, the total focal length f=23.11mm of image face oblique optical system, aperture F#
=2.8,2y=7.6mm.
First embodiment is seen in remaining not described part, repeats no more.
3rd embodiment
Referring to Figure 10-Figure 13, in the present embodiment, the total focal length f=21.5mm of image face oblique optical system, aperture F#
=3.2,2y=6mm.
First embodiment is seen in remaining not described part, repeats no more.
In first embodiment to 3rd embodiment, each relational expression meets following condition：
The ultimate principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (4)
1. a kind of image face oblique optical system, including eyeglass, is characterized in that the eyeglass includes setting successively from the object side to image side
It is equipped with the first lens (L1), second lens (L2) of positive bent moon, the 3rd lens (L3) of negative concave-concave and the positive biconvex of positive biconvex
4th lens (L4), diaphragm is arranged between the 3rd lens (L3) and the 4th lens (L4), and the first lens (L1) are near object
Body；It meets relational expression：
-4.96<h1*f1/f<-3.26；
-4.26<h2*f2/f<-3.84；
0.2<h3*f3/f<0.4；
0.001<h4*f4/f<0.01；
Wherein, f1 is the focal length of the first lens (L1), and f2 is the focal length of the second lens (L2), and f3 is Jiao of the 3rd lens (L3)
Away from f4 is the focal length of the 4th lens (L4), and f is the total focal length of system, h1It is chief ray incident high on the first lens (L1)
Degree, h2For height of incidence of the chief ray on the second lens (L2), h3For height of incidence of the chief ray on the 3rd lens (L3),
h4For height of incidence of the chief ray on the 4th lens (L4).
2. image face oblique optical system according to claim 1, is characterized in that first lens (L1), the second lens
(L2) and the 4th lens (L4) from glass material Abbe number be υd1, Abbe of the 3rd lens (L3) from glass material
Number is υd2, it meets relational expression：
58.61 ＜ υd1＜ 63.61,
31.184 ＜ υd2＜ 32.179.
3. image face oblique optical system according to claim 1, is characterized in that first lens (L1), the second lens
(L2), the material heat differential coefficient of the 3rd lens (L3) and the 4th lens (L4) is followed successively by ki, j=1,2,3,4；It meets relation
Formula：
-1564×10-6＜ h1f1k1＜ -1020 × 10-6,
-1300×10-6＜ h2f2k2＜ -1240 × 10-6,
18.48×10-6＜ h3f3k3＜ 33.05 × 10-6,
0.5×10-6＜ h4f4k4＜ 2.3 × 10-6。
4., according to the arbitrary described image face oblique optical system of claims 1 to 3, the principal plane that it is characterized in that the system hangs down
Directly in optical axis, the inclination angle of subject, detector and optical axis meets：
Wherein, θ is the angle between object plane and optical axis,For the angle between image planes and optical axis, β is to amplify
Multiplying power is the angle formed between the system object being shot and system optical axis, and β is equal to or more than 35 °, its photodetection dress
Put the inclination angle between optical axis and be equal to or more than 62 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149368.XA CN106646827B (en) | 2016-12-14 | 2016-12-14 | Object image plane tilting optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149368.XA CN106646827B (en) | 2016-12-14 | 2016-12-14 | Object image plane tilting optical system |
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| Publication Number | Publication Date |
|---|---|
| CN106646827A true CN106646827A (en) | 2017-05-10 |
| CN106646827B CN106646827B (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611149368.XA Active CN106646827B (en) | 2016-12-14 | 2016-12-14 | Object image plane tilting optical system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010032813A (en) * | 2008-07-29 | 2010-02-12 | Kyocera Corp | Optical device for camera mounted in vehicle |
| JP2011059726A (en) * | 2010-12-22 | 2011-03-24 | Canon Inc | Variable power optical system and camera having the same |
| CN202221491U (en) * | 2011-05-17 | 2012-05-16 | 大立光电股份有限公司 | Optical lens assembly for image pickup |
| CN103837961A (en) * | 2012-11-26 | 2014-06-04 | 鸿富锦精密工业（深圳）有限公司 | Wide-angle imaging lens |
| CN206321857U (en) * | 2016-12-14 | 2017-07-11 | 舜宇光学(中山)有限公司 | A kind of image face oblique optical system |
-
2016
- 2016-12-14 CN CN201611149368.XA patent/CN106646827B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010032813A (en) * | 2008-07-29 | 2010-02-12 | Kyocera Corp | Optical device for camera mounted in vehicle |
| JP2011059726A (en) * | 2010-12-22 | 2011-03-24 | Canon Inc | Variable power optical system and camera having the same |
| CN202221491U (en) * | 2011-05-17 | 2012-05-16 | 大立光电股份有限公司 | Optical lens assembly for image pickup |
| CN103837961A (en) * | 2012-11-26 | 2014-06-04 | 鸿富锦精密工业（深圳）有限公司 | Wide-angle imaging lens |
| CN206321857U (en) * | 2016-12-14 | 2017-07-11 | 舜宇光学(中山)有限公司 | A kind of image face oblique optical system |
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| CN106646827B (en) | 2023-05-02 |
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