CN106154503A - A kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof - Google Patents
A kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof Download PDFInfo
- Publication number
- CN106154503A CN106154503A CN201610722604.6A CN201610722604A CN106154503A CN 106154503 A CN106154503 A CN 106154503A CN 201610722604 A CN201610722604 A CN 201610722604A CN 106154503 A CN106154503 A CN 106154503A
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- lens
- eyeglass
- group
- focal length
- spacer ring
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000000571 coke Substances 0.000 claims abstract description 6
- 125000006850 spacer group Chemical group 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 239000003973 paint Substances 0.000 claims description 5
- 238000005488 sandblasting Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000004313 glare Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 description 11
- 238000003384 imaging method Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003595 spectral effect Effects 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
- G02B13/04—Reversed telephoto objectives
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Abstract
The present invention relates to a kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof, including the front group of eyeglass set gradually along light direction, fixed aperture and after organize eyeglass, before described, group eyeglass is the negative selenodont lens of positive light coke, after described, the focal power of group eyeglass is negative, and described rear group eyeglass includes the first biconvex lens, touched, by negative selenodont lens and the second biconvex lens, glued group constituted.This apparatus structure is simple, diverse in function.
Description
Technical field
The present invention relates to a kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof.
Background technology
Common pick-up lens only has a back focal length of general length, and especially longer at focal length itself, resolution requirement is relatively
In the case of height, it is desirable to back focal length length has certain difficulty more than focal length.When in application of special occasions, such as machine
Tool structural member interferes, photosignal needs repeatedly to transfer imaging, consideration personnel and the equipment factors dictate back focal length such as safely
Time longer, common pick-up lens is incompetent.
Summary of the invention
The problem that the present invention is directed to the existence of above-mentioned prior art makes improvement, i.e. the technical problem to be solved is
A kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof is provided, there is strong anti-long distance structure special
Levying, optics and structure back focal length are all longer than focal length itself, reach more than 72mm, are particularly well-suited to requirement optics, structure back focal length
Require the longest occasion；Resolution of lens is high, to all energy high definition imagings of infinity distance, close-in target, adapts to million pictures
The high definition camera of element.
In order to solve above-mentioned technical problem, a kind of technical scheme of the present invention is: a kind of high score with overlength back focal length
Resolution reversed telephoto lens, including the front group of eyeglass set gradually along light direction, fixed aperture and after organize eyeglass, described before
Group eyeglass is the negative selenodont lens of positive light coke, and the focal power of described rear group eyeglass is negative, and described rear group eyeglass includes first
Biconvex lens, glued group be made up of negative selenodont lens and the second biconvex lens contiguity.
Further, the airspace between described front group eyeglass and fixed aperture is 7.6mm, fixed aperture and rear group of mirror
Airspace between sheet is 6.45mm.
Further, the air gap between described first biconvex lens and glued group is 13.75mm.
Further, described first biconvex lens is made up of H-FK61 ED material.
Further, the lens barrel of an integrated design wrapping all eyeglasses is also included.
Further, described lens barrel Inner Front End is provided with before spiral compression the front trim ring organizing eyeglass, described front group mirror
The first adjustment pad and the first spacer ring, described first biconvex lens and glued group it is disposed with between sheet and the first biconvex lens
Between be disposed with the second spacer ring and second adjust pad, described first spacer ring medial wall is simultaneously as camera lens fixed aperture.
Further, the described lens barrel outer surface black process of sandblasting oxygen, described front trim ring, first, second spacer ring Surface Oxygen are black
Process.
Further, described front trim ring, the first spacer ring and the second spacer ring medial wall are provided with some grooves, those
Groove is coated with delustring paint, utilizes lens barrel inwall to the scattering of stray light emission and absorption, thus reaches to suppress the mesh of veiling glare
's.
Further, described lens barrel is cylindrical, and lateral wall, its rear end is provided with the external screw thread as mounting interface.
In order to solve above-mentioned technical problem, the another kind of technical scheme of the present invention is: a kind of height with overlength back focal length
The manufacture method of resolution reversed telephoto lens, sequentially includes the following steps:
(1) optics make: include the front group of eyeglass set gradually along light direction, fixed aperture and after organize eyeglass,
Front group of eyeglass is the negative selenodont lens of positive light coke, and the focal power of rear group eyeglass is negative, and rear group eyeglass includes the first lenticular
Mirror, glued group be made up of negative selenodont lens and the second biconvex lens contiguity；The front group of air between eyeglass and fixed aperture
Being spaced apart 7.6mm, the airspace between fixed aperture and rear group eyeglass is 6.45mm；Between first biconvex lens and glued group
The air gap be 13.75mm；
(2) mechanical part make: the cylindrical lens barrel including integrated design, the front trim ring being sequentially arranged in lens barrel, first
Adjusting pad, the first spacer ring, the second spacer ring and second and adjust pad, the first spacer ring medial wall is simultaneously as camera lens fixed aperture；
The lens barrel outer surface black process of sandblasting oxygen, front trim ring, the first, second black process of spacer ring Surface Oxygen, front trim ring, the first spacer ring and second
Being provided with some grooves on spacer ring medial wall, those grooves are coated with and are covered with delustring paint, and lateral wall, lens barrel rear end is provided with conduct
The external screw thread of mounting interface, lens barrel leading inside wall is provided with the female thread of trim ring before being spirally connected；
(3) assemble: front group of eyeglass is arranged on front trim ring and first and adjusts between pad, the first biconvex lens be arranged on first every
Between circle and the second spacer ring, glued group is arranged on the second adjustment pad rear end, and before rotating, trim ring compresses eyeglass.
Compared with prior art, the method have the advantages that and the invention provides a kind of optics, structure back focal length
Being all higher than the high-resolution reversed telephoto lens of focal length itself, reach more than 72mm, therefore its applicable situation is the most wide in range, especially
Back focal length is required the longest special circumstances, is greatly improved at aspect relatively common lens such as adaptability, safety, popularity；Choosing
Use ED(ED) optical material, effectively reduce the aberrations such as optical lens second order spectrum, make the camera lens can be at wide spectrum model
Enclose interior work, and infinity target, close-in target are all had the strongest detection identification ability.
The present invention will be further described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the organigram of optics in the embodiment of the present invention.
Fig. 2 is the organigram of the embodiment of the present invention.
Fig. 3 is the transfer curve figure of the embodiment of the present invention.
In figure: organizing lens before 1-, trim ring before 2-, 3-first adjusts pad, 4-the first biconvex lens, 5-the first spacer ring, 6-
Lens barrel, 7-the second spacer ring, the negative selenodont lens of 8-gluing group, 9-second adjusts pad, 10-the second biconvex lens, 11-light
Door screen, 12-imaging target surface, L-optics back focal length, the distance of structure back focal length.
Detailed description of the invention
Embodiment one: as shown in Fig. 1 ~ 3, a kind of high-resolution reversed telephoto lens with overlength back focal length, including along light
Front group of eyeglass 1 that line incident direction sets gradually, fixed aperture 11 and after organize eyeglass, described before group eyeglass be the negative of positive light coke
Selenodont lens, the focal power of described rear group eyeglass is negative, and described rear group eyeglass includes the first biconvex lens 4, by negative selenodont
Lens 8 and the second biconvex lens 10 touch glued group constituted.
In the present embodiment, the airspace between described front group eyeglass and fixed aperture is 7.6mm, fixed aperture and rear group
Airspace between eyeglass is 6.45mm.
In the present embodiment, the air gap between described first biconvex lens and glued group is 13.75mm.
In the present embodiment, on imaging target surface 12, i.e. optics back focal length, distance L of structure back focal length are 73mm.
In the present embodiment, described first biconvex lens is made up of H-FK61 ED material.
In the present embodiment, also include the lens barrel 6 of an integrated design wrapping all eyeglasses.
In the present embodiment, described lens barrel 6 Inner Front End is provided with before spiral compression the front trim ring 2 organizing eyeglass, described before
It is disposed with the first adjustment pad 3 and the first spacer ring 5, described first biconvex lens between group eyeglass 1 and the first biconvex lens 4
Being disposed with the second spacer ring 7 and second between 4 and glued group and adjust pad 9, described first spacer ring medial wall is simultaneously as mirror
Head fixed aperture.Adjust pad and be designed as general part, reduce machining kinds, it is simple to control machining accuracy.
In the present embodiment, lens barrel is designed as straight tube, and the lens of front group of eyeglass and rear group of eyeglass are all arranged in lens barrel, spacer ring
External diameter design is consistent with lens barrel internal diameter, is assembled by cooperation and lens deadweight automatic centering, makes each lens axis centering, it is ensured that
Camera lens picture element is optimum.
In the present embodiment, the described lens barrel outer surface black process of sandblasting oxygen, described front trim ring, first, second spacer ring Surface Oxygen
Black process, makes camera lens overall appearance coordinate.
In the present embodiment, described front trim ring, the first spacer ring and the second spacer ring medial wall are provided with some grooves, should
A little grooves are coated with delustring paint, utilize lens barrel inwall to the scattering of stray light emission and absorption, thus reach to suppress veiling glare
Purpose.
In the present embodiment, described lens barrel is cylindrical, and lateral wall, its rear end is provided with the external screw thread as mounting interface.
Above-mentioned camera lens reaches following technical specification:
1, focal length: f '=60mm；
2, optics back focal length, structure back focal length: not less than 72mm；
3, relative aperture D/F=1/3.5；
4, it is suitable for spectral region: 400nm～700nm；
5, resolution: adaptive with the high-definition camera of mega pixel；
6, operating temperature: realize optical passive mode in the range of-40 DEG C ~+65 DEG C without thermalized design；
When optical design, rear group of eyeglass uses a piece of ED(ED) optical material, first cause is: due to instead
The feature that long distance structure is intrinsic, optical power profile be front negative after just, back focal length requires the longest, and front group of eyeglass dissipates work to light
With the strongest, cause at rear group of eyeglass upper shaft glazed thread height relatively big, use ED optical material that axial aberration can be greatly lowered
The especially impact of second order spectrum aberration.Secondly, in a lot of occasions, it is desirable to camera lens adapts to large-scale ambient temperature and becomes
Change, it is not necessary to artificially again focus on, i.e. realize without thermalized design.Wherein the highest without thermalized design difficulty with optical passive mode, can
The highest by property, it is negative feature owing to ED optical material often has thermal refractive index coefficient, it is contemplated that anti-long distance structure
Feature, uses ED optical material can reduce without thermalized design difficulty.
Simultaneously taking account of, the expansion rate in face outside camera lens, thermal refractive index coefficient should be less, to reduce environment temperature as far as possible
Spending the uneven impact brought, therefore we use ED optical material at rear group of eyeglass first, select temperature adaptation in outside
The higher common material of property.
By coatings optimization design, make camera lens have the transmitance being better than 92% in the range of 400-700nm broadband, improve
Detectivity, weakens stray light, meets the detection demand of wide dynamic range target.Its light transfer curve such as Fig. 3
Shown in.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modify, all should belong to the covering scope of the present invention.
Claims (10)
1. a high-resolution reversed telephoto lens with overlength back focal length, it is characterised in that: include depending on along light direction
Front group of eyeglass of secondary setting, fixed aperture and after organize eyeglass, described before group eyeglass be the negative selenodont lens of positive light coke, described
The focal power of rear group of eyeglass is negative, and described rear group eyeglass includes the first biconvex lens, by negative selenodont lens and the second lenticular
Glued group of mirror contiguity composition.
The high-resolution reversed telephoto lens with overlength back focal length the most according to claim 1, it is characterised in that: before described
Airspace between group eyeglass and fixed aperture is 7.6mm, and the airspace between fixed aperture and rear group eyeglass is
6.45mm。
The high-resolution reversed telephoto lens with overlength back focal length the most according to claim 1 and 2, it is characterised in that: institute
The air gap stated between the first biconvex lens and glued group is 13.75mm.
The high-resolution reversed telephoto lens with overlength back focal length the most according to claim 3, it is characterised in that: described
One biconvex lens is made up of H-FK61 ED material.
The high-resolution reversed telephoto lens with overlength back focal length the most according to claim 3, it is characterised in that: also include
The lens barrel of one integrated design wrapping all eyeglasses.
The high-resolution reversed telephoto lens with overlength back focal length the most according to claim 5, it is characterised in that: described mirror
Cylinder Inner Front End is provided with before spiral compression the front trim ring organizing eyeglass, between described front group eyeglass and the first biconvex lens successively
Be provided with the first adjustment pad and the first spacer ring, be disposed with between described first biconvex lens and glued group the second spacer ring and
Second adjusts pad, and described first spacer ring medial wall is simultaneously as camera lens fixed aperture.
The high-resolution reversed telephoto lens with overlength back focal length the most according to claim 6, it is characterised in that: described mirror
The black process of tube outer surface sandblasting oxygen, described front trim ring, the first, second black process of spacer ring Surface Oxygen.
8. according to the high-resolution reversed telephoto lens with overlength back focal length described in claim 6 or 7, it is characterised in that: institute
Stating and be provided with some grooves on front trim ring, the first spacer ring and the second spacer ring medial wall, those grooves are coated with delustring paint, profit
With lens barrel inwall to the scattering of stray light emission and absorption, thus reach to suppress the purpose of veiling glare.
The high-resolution reversed telephoto lens with overlength back focal length the most according to claim 5, it is characterised in that: described mirror
Cylinder is cylindrical, and lateral wall, its rear end is provided with the external screw thread as mounting interface.
10. the manufacture method of a high-resolution reversed telephoto lens with overlength back focal length, it is characterised in that according to the following steps
Carry out:
(1) optics make: include the front group of eyeglass set gradually along light direction, fixed aperture and after organize eyeglass,
Front group of eyeglass is the negative selenodont lens of positive light coke, and the focal power of rear group eyeglass is negative, and rear group eyeglass includes the first lenticular
Mirror, glued group be made up of negative selenodont lens and the second biconvex lens contiguity；The front group of air between eyeglass and fixed aperture
Being spaced apart 7.6mm, the airspace between fixed aperture and rear group eyeglass is 6.45mm；Between first biconvex lens and glued group
The air gap be 13.75mm；
(2) mechanical part make: the cylindrical lens barrel including integrated design, the front trim ring being sequentially arranged in lens barrel, first
Adjusting pad, the first spacer ring, the second spacer ring and second and adjust pad, the first spacer ring medial wall is simultaneously as camera lens fixed aperture；
The lens barrel outer surface black process of sandblasting oxygen, front trim ring, the first, second black process of spacer ring Surface Oxygen, front trim ring, the first spacer ring and second
Being provided with some grooves on spacer ring medial wall, those grooves are coated with and are covered with delustring paint, and lateral wall, lens barrel rear end is provided with conduct
The external screw thread of mounting interface, lens barrel leading inside wall is provided with the female thread of trim ring before being spirally connected；
(3) assemble: front group of eyeglass is arranged on front trim ring and first and adjusts between pad, the first biconvex lens be arranged on first every
Between circle and the second spacer ring, glued group is arranged on the second adjustment pad rear end, and before rotating, trim ring compresses eyeglass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722604.6A CN106154503A (en) | 2016-08-26 | 2016-08-26 | A kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722604.6A CN106154503A (en) | 2016-08-26 | 2016-08-26 | A kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106154503A true CN106154503A (en) | 2016-11-23 |
Family
ID=57343482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610722604.6A Pending CN106154503A (en) | 2016-08-26 | 2016-08-26 | A kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof |
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| Country | Link |
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| CN (1) | CN106154503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108227137A (en) * | 2017-12-29 | 2018-06-29 | 利达光电股份有限公司 | A kind of high definition on-vehicle lens for being used to identify medium and long distance barrier |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10288736A (en) * | 1997-04-16 | 1998-10-27 | Asahi Optical Co Ltd | Endoscope objective lens system |
| JP2002244031A (en) * | 2001-02-21 | 2002-08-28 | Nagano Kogaku Kenkyusho:Kk | Wide-angle lens |
| US7502182B2 (en) * | 2006-02-14 | 2009-03-10 | Fujinon Corporation | Objective lens for endoscope |
| CN104820278A (en) * | 2014-01-31 | 2015-08-05 | Hoya株式会社 | Wide-angle lens |
| CN105301744A (en) * | 2015-11-24 | 2016-02-03 | 福建福光股份有限公司 | Telephoto type super-large image plane high definition lens and installation method thereof |
| CN206002756U (en) * | 2016-08-26 | 2017-03-08 | 福建福光股份有限公司 | A kind of high-resolution reversed telephoto lens with overlength back focal length |
-
2016
- 2016-08-26 CN CN201610722604.6A patent/CN106154503A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10288736A (en) * | 1997-04-16 | 1998-10-27 | Asahi Optical Co Ltd | Endoscope objective lens system |
| JP2002244031A (en) * | 2001-02-21 | 2002-08-28 | Nagano Kogaku Kenkyusho:Kk | Wide-angle lens |
| US7502182B2 (en) * | 2006-02-14 | 2009-03-10 | Fujinon Corporation | Objective lens for endoscope |
| CN104820278A (en) * | 2014-01-31 | 2015-08-05 | Hoya株式会社 | Wide-angle lens |
| CN105301744A (en) * | 2015-11-24 | 2016-02-03 | 福建福光股份有限公司 | Telephoto type super-large image plane high definition lens and installation method thereof |
| CN206002756U (en) * | 2016-08-26 | 2017-03-08 | 福建福光股份有限公司 | A kind of high-resolution reversed telephoto lens with overlength back focal length |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108227137A (en) * | 2017-12-29 | 2018-06-29 | 利达光电股份有限公司 | A kind of high definition on-vehicle lens for being used to identify medium and long distance barrier |
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Application publication date: 20161123 |