CN108563001A - Short operating distance telecentric lens - Google Patents
Short operating distance telecentric lens Download PDFInfo
- Publication number
- CN108563001A CN108563001A CN201810716492.2A CN201810716492A CN108563001A CN 108563001 A CN108563001 A CN 108563001A CN 201810716492 A CN201810716492 A CN 201810716492A CN 108563001 A CN108563001 A CN 108563001A
- Authority
- CN
- China
- Prior art keywords
- lens
- eyeglass group
- balsaming
- positive light
- light coke
- 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.)
- Pending
Links
- 239000000571 coke Substances 0.000 claims abstract description 33
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 238000003384 imaging method Methods 0.000 claims abstract description 27
- 230000000007 visual effect Effects 0.000 claims description 6
- 230000004075 alteration Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 201000009310 astigmatism Diseases 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 12
- 238000004026 adhesive bonding Methods 0.000 description 5
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 4
- 206010073261 Ovarian theca cell tumour Diseases 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 208000001644 thecoma Diseases 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
A kind of short operating distance telecentric lens include successively from the object side to image side：The first eyeglass group with positive light coke, the second eyeglass group with positive light coke, abnormity turn back prism, diaphragm, the third eyeglass group with positive light coke, the 4th eyeglass group with positive light coke and with the imaging surface of optical sensor.Telecentric lens of the present invention have the imaging capability of up to 8M pixels, being capable of blur-free imaging；Meet object space, image space doubly telecentric simultaneously, and object space telecentricity and image space telecentricity can meet the standard of general telecentric lens and have high telecentricity level；By special prism arrangement of turning back, it can be substantially reduced the case where coaxial light source is formed by bright spot of view-field center, avoid imaging problem caused by the halation of light source generation；For the clear excellent imaging of the energy of the light in 435nm~656nm wave-length coverages, without apparent purple boundary and dispersion, image quality clearly becomes clear.
Description
Technical field
The present invention relates to a kind of technology in optical device field, specifically a kind of operating distance is the telecentricity of 100mm
Camera lens.
Background technology
Telecentric lens are mainly to be designed to correct the parallax of traditional industry camera lens, it can be in certain object distance range
It is interior, so as to get image magnification multiplying power it is constant, this is to the very important application of situation of the measured object not on same object plane.It is existing
Have in technology, telecentric lens are broadly divided into object space telecentricity and image space telecentricity, and doubly telecentric camera lens then contains two kinds of telecentric beam paths
Common advantage, therefore design difficulty bigger, often object space, the telecentricity of image space can not meet high level to such camera lens simultaneously,
And pixel resolution is low, operating distance length is larger so as to cause camera lens overall volume.In addition, the prism design of traditional telecentric lens
Cause light source that can form speck in image plane center, disturbs the image quality of camera lens.
Invention content
The present invention is directed to deficiencies of the prior art, proposes a kind of short operating distance telecentric lens, has both object space
The advantages of telecentricity and image space telecentricity, while also having telecentricity height, 8M high-resolution, operating distance short, non-stop layer speck excellent
Point.
The present invention is achieved by the following technical solutions：
The present invention includes successively from the object side to image side：The first eyeglass group with positive light coke, with positive light coke
Two eyeglass groups, special-shaped turn back prism, diaphragm, the third eyeglass group with positive light coke, the 4th eyeglass group with positive light coke
With the imaging surface with optical sensor.
The first eyeglass group includes successively：The first lens with positive light coke, the second glue with negative power
Lens, the third lens with negative power and the 4th balsaming lens with negative power are closed, wherein：Second balsaming lens
The concave surface of cemented surface is towards object space, and the concave surface of the cemented surface of the 4th balsaming lens is towards object space.
The third lens are preferably set as balsaming lens to further decrease the ball of optical system in the first eyeglass group
Difference.
The second eyeglass group includes successively：The 5th lens with positive light coke, the with negative power the 6th are thoroughly
Mirror and the 7th lens with positive light coke.
Abnormity prism of turning back includes：Object space is set as front and effectively mitigates ghost and light by three pieces of glued triangular prisms
It is dizzy.
The third eyeglass group is any one following structure：
1. including successively：The 8th lens with negative power, the 9th balsaming lens with positive light coke and with negative
Tenth lens of focal power, wherein：The concave surface of the cemented surface of 9th balsaming lens is towards image space.
2. including successively：One piece of three balsaming lens and the tenth lens with negative power, to further decrease optics
Astigmatism, curvature of the image and the optical distortion of system.
The 4th eyeglass group includes successively：The 11st lens with negative power and the with positive light coke the tenth
Two balsaming lens, wherein：The concave surface of the cemented surface of 12nd balsaming lens is towards image space.
First eyeglass group, the second eyeglass group, third eyeglass group, the focal length of the 4th eyeglass group and the camera lens whole focal length
The absolute value of ratio be followed successively by (2.5,6.5), (0.2,0.5), (1,1.8), (0.4,0.7) to increase the telecentricity of camera lens.
The chief ray of the peripheral field of the camera lens and the incidence angle of imaging surface are less than 10 ° to ensure the light of surrounding visual field
Bright ratio.
The incident chief ray of the front surface of first lens and the angle of optical axis are less than 0.03 ° to determine object space telecentricity
Degree；The outgoing chief ray of the rear surface of 12nd balsaming lens and the angle of optical axis are less than 0.03 ° to determine image space
Telecentricity degree.
The ratio that first front lens of second balsaming lens and the refractive index of the second rear lens are be (0.8,
1.1), the absolute value of the difference of the Abbe number of the first front lens and the first rear lens be (0,10), the focal length of the first front lens with
The focal length of the ratio of the focal length of second balsaming lens and the first rear lens is exhausted with the difference of the ratio of the focal length of the second balsaming lens
It is (0.2,0.5) to value.
The ratio of 4th front lens of the 12nd balsaming lens and the refractive index of the 4th rear lens is (0.8,1),
The absolute value of 4th front lens and the difference of the Abbe number of the 4th rear lens is (0,25), the diameter and front surface of the 4th front surface
Radius of curvature ratio and the 4th rear surface diameter and the ratio of the radius of curvature of the 4th rear surface and absolute value be
(0.3,0.5)。
Technique effect
Compared with prior art, telecentric lens of the present invention have the imaging capability of up to 8M pixels, being capable of blur-free imaging；Together
When meet object space, image space doubly telecentric, and object space telecentricity and image space telecentricity can meet the standard of general telecentric lens simultaneously
It is horizontal to have high telecentricity；By special prism arrangement of turning back, coaxial light source can be substantially reduced and be formed by center
The case where speck, avoids imaging problem caused by the halation of light source generation；For the light in 435nm~656nm wave-length coverages
The clear excellent imaging of line energy, without apparent purple boundary and dispersion, image quality clearly becomes clear；Ensure the bright ratio of surrounding visual field so that mirror
Evenly, periphery is without dark angle for head imaging picture brightness；The operating distance of camera lens is 100mm, is less than from object plane to image planes distance
220mm ensure that enlargement ratio and image quality, while accomplish compact overall structure, reduce the working space of camera lens, more
Meet demand of the market for miniaturization.
Description of the drawings
Fig. 1 is the structural schematic diagram of embodiment 1；
Fig. 2 is spherical aberration, the curvature of field, distortion figure of the embodiment 1 about d light (587.56nm)；
Fig. 3 is the structural schematic diagram of embodiment 2；
Fig. 4 is spherical aberration, the curvature of field, distortion figure of the embodiment 2 about d light (587.56nm)；
Fig. 5 is the structural schematic diagram of embodiment 3；
Fig. 6 is spherical aberration, the curvature of field, distortion figure of the embodiment 3 about d light (587.56nm)；
Fig. 7 is the index path for the specific prism of turning back that embodiment uses；
Fig. 8 is the index path of prism back lighting of commonly turning back；
Fig. 9 is light source real scene shooting test chart after specific prism of turning back；
Figure 10 is light source real scene shooting test chart after common prism of turning back；
In figure：First eyeglass group G1, the second eyeglass group G2, abnormity are turned back prism LL, diaphragm STP, third eyeglass group G3,
Four eyeglass group G4, imaging surface IMG, the first lens L1, the second balsaming lens L2, the third lens L3, the 4th balsaming lens L4, the 5th
Lens L5, the 6th lens L6, the 7th lens L7, the 8th lens L8, the 9th balsaming lens L9, the tenth lens L10, the 11st lens
L11, the 12nd balsaming lens L12, the first front lens L21, the first rear lens L22, the second front lens L41, the second rear lens
L42, third front lens L91, third rear lens L92, the 4th front lens L121, the 4th rear lens L122, the 5th front lens L31,
5th rear lens L32.
Specific implementation mode
Embodiment 1
As shown in Figure 1, the present embodiment includes successively from the object side to image side：The first eyeglass group G1, tool with positive light coke
There are the second eyeglass group G2, the special-shaped prism LL that turns back, diaphragm STP, the third eyeglass group G3 with positive light coke, the tool of positive light coke
There are the 4th eyeglass group G4 of positive light coke and the imaging surface IMG with optical sensor.
The first eyeglass group G1 includes successively：The first lens L1 with positive light coke, with negative power
Two balsaming lens L2, the third lens L3 with negative power and the 4th balsaming lens L4 with negative power, wherein：Second
The concave surface of the cemented surface of balsaming lens L2 is towards object space, and the concave surface of the cemented surface of the 4th balsaming lens L4 is towards object space.
The second eyeglass group G2 includes successively：The 5th lens L5 with positive light coke, with negative power
Six lens L6 and the 7th lens L7 with positive light coke.
The abnormity prism LL that turns back includes：Three pieces of glued triangular prisms, by object space be set as front effectively mitigate ghost and
Halation.
The third eyeglass group G3 includes successively：The 8th lens L8 with negative power, with positive light coke
Nine balsaming lens L9 and the tenth lens L10 with negative power, wherein：The concave surface direction of the cemented surface of 9th balsaming lens L9
Image space.
The 4th eyeglass group G4 includes successively：The 11st lens L11 with negative power and with positive light coke
The 12nd balsaming lens L12, wherein：The concave surface of the cemented surface of 12nd balsaming lens L12 is towards image space.
The effective focal length of the present embodiment is 88mm, and image distance is 220mm.
1 the present embodiment lens construction parameter of table
Wherein the second surface of the first front lens L21 of the second balsaming lens L2 is the first surface of the first rear lens L22,
The second surface of the second front lens L41 of 4th balsaming lens L4 is the first surface of the second rear lens L42, the 9th balsaming lens
The second surface of the third front lens L91 of L9 be third rear lens L92 first surface, the 4th of the 12nd balsaming lens L12 the
The second surface of front lens L121 is the first surface of the 4th rear lens L122.
The focal length and camera lens of the first eyeglass group G1, the second eyeglass group G2, third eyeglass group G3, the 4th eyeglass group G4
The absolute value of the ratio of whole focal length is followed successively by 6.29,0.42,1.73,0.63 to increase the telecentricity of camera lens.
The chief ray of the peripheral field of the camera lens is with incident angle α=8 ° of imaging surface IMG to ensure surrounding visual field
Bright ratio.
The incident chief ray of the front surface of the first lens L1 and s1=0.03 ° of the angle theta of optical axis are to determine object space
Telecentricity degree；The outgoing chief ray of the rear surface of the 12nd balsaming lens L12 and si=0.03 ° of the angle theta of optical axis with
Determine image space telecentricity degree.
The ratio that the refractive index of the first front lens L21 and the second rear lens L22 of the second balsaming lens L2 are is
The absolute value of the difference of the Abbe number of Nd21/Nd22=1.07, the first front lens L21 and the first rear lens L22 is | Vd21-
Vd22 |=2.4, the coke of the ratio and the first rear lens L22 of the focal length of the focal length of the first front lens L21 and the second balsaming lens L2
The absolute value of the difference of ratio away from the focal length with the second balsaming lens L2 is | (f21/f2)-(f22/f2) |=0.47, and to sum up about
The material of the second balsaming lens L2 of beam and focal length ratio, the lens materials of height Abbe number are matched the ratio of complex focus, are effectively dropped
The optical distortion of low camera lens and ratio chromatism,.
The ratio of the refractive index of the 4th front lens L121 and the 4th rear lens L122 of the 12nd balsaming lens L12
For Nd121/Nd122=0.88, the 4th front lens L121 and the absolute value of the difference of the Abbe number of the 4th rear lens L122 be |
Vd121-Vd122 |=3.5, the diameter of the ratio and the 4th rear surface of the diameter of the 4th front surface and the radius of curvature of front surface
With the ratio of the radius of curvature of the 4th rear surface and absolute value be | ((Φ s121)/(Rs121)+(Φ s123)/
(Rs123)) |=0.38, to sum up constrain the face type and material of the 12nd balsaming lens L12, the gluing of height Abbe number combinations
The concaveconvex shape of lens set material mating balsaming lens group, reduces the coma and chromatism of position of camera lens.
As shown in Fig. 2, the optical distortion of the present embodiment is much smaller than 1%, it can guarantee that lens imaging is uniform under any multiplying power,
The accuracy and predictability for increasing imaging results, meet the needs of industrial lens.
Embodiment 2
As shown in figure 3, compared with Example 1, the third lens L3 of the present embodiment is balsaming lens to further decrease light
The spherical aberration of system.
The effective focal length of the present embodiment is 100mm, and image distance is 220mm.
2 the present embodiment lens construction parameter of table
Wherein the second surface of the first front lens L21 of the second balsaming lens L2 is the first surface of the first rear lens L22,
The second surface of the 5th front lens L31 of the third lens L3 is the first surface of the 5th rear lens L32, the 4th balsaming lens L4's
The second surface of second front lens L41 is the first surface of the second rear lens L42, the third front lens of the 9th balsaming lens L9
The second surface of L91 is the first surface of third rear lens L92, the of the 4th front lens L121 of the 12nd balsaming lens L12
Two surfaces are the first surface of the 4th rear lens L122.
The focal length and camera lens of the first eyeglass group G1, the second eyeglass group G2, third eyeglass group G3, the 4th eyeglass group G4
The absolute value of the ratio of whole focal length is followed successively by 3.13,0.39,1.74,0.51 to increase the telecentricity of camera lens.
The chief ray of the peripheral field of the camera lens is with incident angle α=9 ° of imaging surface IMG to ensure surrounding visual field
Bright ratio.
The incident chief ray of the front surface of the first lens L1 and s1=0.03 ° of the angle theta of optical axis are to determine object space
Telecentricity degree；The outgoing chief ray of the rear surface of the 12nd balsaming lens L12 and si=0.03 ° of the angle theta of optical axis with
Determine image space telecentricity degree.
The ratio that the refractive index of the first front lens L21 and the second rear lens L22 of the second balsaming lens L2 are is
The absolute value of the difference of the Abbe number of Nd21/Nd22=0.94, the first front lens L21 and the first rear lens L22 is | Vd21-
Vd22 |=0, the focal length of the ratio and the first rear lens L22 of the focal length of the focal length of the first front lens L21 and the second balsaming lens L2
Absolute value of the difference with the ratio of the focal length of the second balsaming lens L2 is | (f21/f2)-(f22/f2) |=0.39, to sum up constrain
The material of the second balsaming lens L2 and focal length ratio, the lens materials of height Abbe number are matched the ratio of complex focus, are effectively reduced
The optical distortion of camera lens and ratio chromatism,.
The ratio of the refractive index of the 4th front lens L121 and the 4th rear lens L122 of the 12nd balsaming lens L12
For Nd121/Nd122=0.92, the 4th front lens L121 and the absolute value of the difference of the Abbe number of the 4th rear lens L122 be |
Vd121-Vd122 |=5.3, the diameter of the ratio and the 4th rear surface of the diameter of the 4th front surface and the radius of curvature of front surface
With the ratio of the radius of curvature of the 4th rear surface and absolute value be | ((Φ s121)/(Rs121)+(Φ s123)/
(Rs123)) |=0.35, to sum up constrain the face type and material of the 12nd balsaming lens L12, the gluing of height Abbe number combinations
The concaveconvex shape of lens set material mating balsaming lens group, reduces the coma and chromatism of position of camera lens.
As shown in figure 4, the optical distortion of the present embodiment is much smaller than 0.7%, it can guarantee that lens imaging is equal under any multiplying power
It is even, the accuracy and predictability of imaging results are increased, meets the needs of industrial lens.
Embodiment 3
As shown in figure 5, compared with Example 1, the 8th lens L8 and the 9th balsaming lens L9 gluings of the present embodiment are formed
Three balsaming lens are to further decrease the astigmatism, curvature of the image and optical distortion of optical system.
The effective focal length of the present embodiment is 98mm, and image distance is 216mm.
3 the present embodiment lens construction parameter of table
Wherein the second surface of the first front lens L21 of the second balsaming lens L2 is the first surface of the first rear lens L22,
The second surface of the second front lens L41 of 4th balsaming lens L4 is the first surface of the second rear lens L42, the 8th lens L8's
Second surface is the third front lens L91 first surfaces of the 9th balsaming lens L9, the third front lens L91 of the 9th balsaming lens L9
Second surface be third rear lens L92 first surface, the second table of the 4th front lens L121 of the 12nd balsaming lens L12
Face is the first surface of the 4th rear lens L122.
The focal length and camera lens of the first eyeglass group G1, the second eyeglass group G2, third eyeglass group G3, the 4th eyeglass group G4
The absolute value of the ratio of whole focal length is followed successively by 2.65,0.42,1.04,0.48 to increase the telecentricity of camera lens.
The chief ray of the peripheral field of the camera lens is with incident angle α=10 ° of imaging surface IMG to ensure surrounding visual field
Bright ratio.
The incident chief ray of the front surface of the first lens L1 and s1=0.03 ° of the angle theta of optical axis are to determine object space
Telecentricity degree；The outgoing chief ray of the rear surface of the 12nd balsaming lens L12 and si=0.03 ° of the angle theta of optical axis with
Determine image space telecentricity degree.
The ratio that the refractive index of the first front lens L21 and the second rear lens L22 of the second balsaming lens L2 are is
The absolute value of the difference of the Abbe number of Nd21/Nd22=0.85, the first front lens L21 and the first rear lens L22 is | Vd21-
Vd22 |=7.8, the coke of the ratio and the first rear lens L22 of the focal length of the focal length of the first front lens L21 and the second balsaming lens L2
The absolute value of the difference of ratio away from the focal length with the second balsaming lens L2 is | (f21/f2)-(f22/f2) |=0.27, and to sum up about
The material of the second balsaming lens L2 of beam and focal length ratio, the lens materials of height Abbe number are matched the ratio of complex focus, are effectively dropped
The optical distortion of low camera lens and ratio chromatism,.
The ratio of the refractive index of the 4th front lens L121 and the 4th rear lens L122 of the 12nd balsaming lens L12
For Nd121/Nd122=0.91, the 4th front lens L121 and the absolute value of the difference of the Abbe number of the 4th rear lens L122 be |
Vd121-Vd122 |=22.7, the diameter of the ratio and the 4th rear surface of the diameter of the 4th front surface and the radius of curvature of front surface
With the ratio of the radius of curvature of the 4th rear surface and absolute value be | ((Φ s121)/(Rs121)+(Φ s123)/
(Rs123)) |=0.41, to sum up constrain the face type and material of the 12nd balsaming lens L12, the gluing of height Abbe number combinations
The concaveconvex shape of lens set material mating balsaming lens group, reduces the coma and chromatism of position of camera lens.
As shown in fig. 6, the optical distortion of the present embodiment is much smaller than 0.6%, it can guarantee that lens imaging is equal under any multiplying power
It is even, the accuracy and predictability of imaging results are increased, meets the needs of industrial lens.
As shown in fig. 7, the specific prism LL that turns back, is formed by three pieces of triangular prism gluings, and using object plane as front, sphere shape light
System is irradiated into above prism, by semi-transparent semi-reflecting lens, the light of half sequentially passes through the mirror in front of prism from back to front
Piece group after being irradiated to object space, is imaged onto using telecentric lens in image planes；The other half light passes downwardly through prism, passes through
Become ghost across the eyeglass group rental at prism rear after four secondary reflections.Because ghost is imaged front-reflection four times, energy attenuation is
The 1/32 of original light source energy can be substantially reduced bright spot of view-field center intensity, mitigate ghost and halation.
As shown in figure 8, the square prism that common two triangular prisms compose, sphere shape light irradiated above prism into
Enter system, by semi-transparent semi-reflecting lens, the light of half passes through the eyeglass group sequentially passed through in front of prism from back to front, is irradiated to
After object space, it is imaged onto in image planes using telecentric lens；The other half light passes downwardly through prism, is passed through after two secondary reflections
The eyeglass group rental at prism rear becomes ghost.Because only being reflected twice before ghost imaging, energy only decays to original light source energy
The 1/8 of amount, bright spot of view-field center intensity is big, there is apparent ghost and halation.
As shown in figure 9, after using the specific prism LL that turns back, even if being located at the positions 1.5cm above prism in point light source
In the case of shoot, light source real scene shooting test center speck situation still can be obviously improved, illustrate the present invention turned back by special
Prism LL combinations, can be substantially reduced the case where coaxial light source is formed by bright spot of view-field center, the halation institute band for avoiding light source from generating
The imaging problem come.As shown in Figure 10, bright spot of view-field center is fairly obvious.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the principle of the invention and objective with difference
Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute
Limit, each implementation within its scope is by the constraint of the present invention.
Claims (10)
1. a kind of short operating distance telecentric lens, which is characterized in that include successively from the object side to image side：With positive light coke
One eyeglass group, the second eyeglass group with positive light coke, abnormity turn back prism, diaphragm, the third eyeglass group with positive light coke,
The 4th eyeglass group with positive light coke and with the imaging surface of optical sensor.
2. short operating distance telecentric lens according to claim 1, characterized in that the first eyeglass group wraps successively
It includes：The first lens with positive light coke, the second balsaming lens with negative power, the third lens with negative power and
The 4th balsaming lens with negative power, wherein：The concave surface of the cemented surface of second balsaming lens is glued saturating towards object space, the 4th
The concave surface of the cemented surface of mirror is towards object space.
3. short operating distance telecentric lens according to claim 2, characterized in that preferably will in the first eyeglass group
The third lens are set as balsaming lens to further decrease the spherical aberration of optical system.
4. short operating distance telecentric lens according to claim 1, characterized in that the third eyeglass group wraps successively
It includes：The 8th lens, the 9th balsaming lens with positive light coke and the tenth lens with negative power with negative power,
Wherein：The concave surface of the cemented surface of 9th balsaming lens is towards image space.
5. short operating distance telecentric lens according to claim 1, characterized in that the third eyeglass group wraps successively
It includes：One piece of three balsaming lens and the tenth lens with negative power, to which the astigmatism, the image planes that further decrease optical system are curved
Bent and optical distortion.
6. short operating distance telecentric lens according to claim 1, characterized in that the second eyeglass group wraps successively
It includes：The 5th lens, the 6th lens with negative power and the 7th lens with positive light coke with positive light coke；It is described
The 4th eyeglass group include successively：The 11st lens with negative power and the 12nd balsaming lens with positive light coke,
Wherein：The concave surface of the cemented surface of 12nd balsaming lens is towards image space.
7. short operating distance telecentric lens according to claim 1, characterized in that abnormity prism of turning back includes：
Object space is set as front and effectively mitigates ghost and halation by three pieces of glued triangular prisms.
8. short operating distance telecentric lens according to claim 1, characterized in that the first eyeglass group, the second mirror
The absolute value of the ratio of focal length and the camera lens whole focal length of piece group, third eyeglass group, the 4th eyeglass group be followed successively by (2.5,6.5),
(0.2,0.5), (1,1.8), (0.4,0.7) are to increase the telecentricity of camera lens.
9. short operating distance telecentric lens according to claim 1, characterized in that the master of the peripheral field of the camera lens
The incidence angle of light and imaging surface is less than 10 ° to ensure the bright ratio of surrounding visual field.
10. short operating distance telecentric lens according to claim 1, characterized in that the incidence of the front surface of the first lens
The angle of chief ray and optical axis is less than 0.03 ° to determine object space telecentricity degree；The rear surface of 12nd balsaming lens
The angle for being emitted chief ray and optical axis is less than 0.03 ° to determine image space telecentricity degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810716492.2A CN108563001A (en) | 2018-07-03 | 2018-07-03 | Short operating distance telecentric lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810716492.2A CN108563001A (en) | 2018-07-03 | 2018-07-03 | Short operating distance telecentric lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108563001A true CN108563001A (en) | 2018-09-21 |
Family
ID=63555047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810716492.2A Pending CN108563001A (en) | 2018-07-03 | 2018-07-03 | Short operating distance telecentric lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108563001A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839729A (en) * | 2018-12-31 | 2019-06-04 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| CN110018554A (en) * | 2019-03-15 | 2019-07-16 | 广东奥普特科技股份有限公司 | A kind of wide-angle machine visual lens |
| CN112230402A (en) * | 2020-09-21 | 2021-01-15 | 中国科学院长春光学精密机械与物理研究所 | Double-view-field fisheye lens |
-
2018
- 2018-07-03 CN CN201810716492.2A patent/CN108563001A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839729A (en) * | 2018-12-31 | 2019-06-04 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| CN109839729B (en) * | 2018-12-31 | 2021-07-30 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
| CN110018554A (en) * | 2019-03-15 | 2019-07-16 | 广东奥普特科技股份有限公司 | A kind of wide-angle machine visual lens |
| CN110018554B (en) * | 2019-03-15 | 2024-03-26 | 广东奥普特科技股份有限公司 | Wide-angle machine vision lens |
| CN112230402A (en) * | 2020-09-21 | 2021-01-15 | 中国科学院长春光学精密机械与物理研究所 | Double-view-field fisheye lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105988207B (en) | Magnifying optics, optical unit and projector apparatus | |
| CN109061856A (en) | The adjustable imaging lens of object space and image space doubly telecentric | |
| CN108563001A (en) | Short operating distance telecentric lens | |
| CN208689245U (en) | Short operating distance telecentric lens | |
| CN208580257U (en) | Doubly telecentric tight shot | |
| CN108563003A (en) | telecentric lens | |
| CN103837970B (en) | Zoom lens, the image projecting equipment including zoom lens and picture pick-up device | |
| CN110196484A (en) | A kind of camera lens | |
| CN110376725A (en) | A kind of fish eye lens system | |
| CN109656007A (en) | Varifocal optical system and imaging device | |
| CN209167653U (en) | A kind of ultra-thin fish eye lens | |
| CN207937679U (en) | With the low optical system according to effect of optimization | |
| CN208689252U (en) | The adjustable imaging lens of object space and image space doubly telecentric | |
| CN108614349B (en) | Double telecentric prime lens | |
| CN108761734A (en) | A kind of ultra-wide angle underwater low-light-level imaging camera lens | |
| CN208569170U (en) | Telecentric lens | |
| CN109307927A (en) | A kind of double-view field doubly telecentric camera lens of built-in coaxial illumination | |
| CN112285888B (en) | Big light ring FA camera lens | |
| CN114578528A (en) | Super wide angle big light ring aspheric surface camera lens | |
| JPS6132651B2 (en) | ||
| CN209433112U (en) | A kind of big target surface line scans lens optical system | |
| CN209417401U (en) | A kind of large aperture telephoto lens | |
| US3661440A (en) | Microscope for inspecting surfaces of holes or the like | |
| CN109212718A (en) | A kind of imaging system | |
| CN117389018B (en) | Optical lens and camera module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 314000 No.188, Taojing Road, Gaozhao street, Xiuzhou District, Jiaxing City, Zhejiang Province Applicant after: Jiaxing Zhongrun Optical Technology Co.,Ltd. Address before: 314000 Room 2F201-6, Building 6, Jiaxing Photovoltaic Science Park, 1288 Kanghe Road, Xiuzhou District, Jiaxing City, Zhejiang Province Applicant before: JIAXING ZHONGRUN OPTICAL SCIENCE AND TECHNOLOGY Co.,Ltd. |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180921 |