CN206002756U - A kind of high-resolution reversed telephoto lens with overlength back focal length - Google Patents
A kind of high-resolution reversed telephoto lens with overlength back focal length Download PDFInfo
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- CN206002756U CN206002756U CN201620940035.8U CN201620940035U CN206002756U CN 206002756 U CN206002756 U CN 206002756U CN 201620940035 U CN201620940035 U CN 201620940035U CN 206002756 U CN206002756 U CN 206002756U
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Abstract
The utility model is related to a kind of high-resolution reversed telephoto lens with overlength back focal length, including set gradually along light incident direction front group of eyeglass, fixed aperture and afterwards organize eyeglass, the front group of eyeglass is the negative selenodont lens of positive light coke, after described, the focal power of group eyeglass is negative, the gluing unit that the rear group eyeglass includes the first biconvex lens, is made up of negative selenodont lens and the second biconvex lens contiguity.This apparatus structure is simple, vdiverse in function.
Description
Technical field
The utility model is related to a kind of high-resolution reversed telephoto lens with overlength back focal length.
Background technology
Common pick-up lens only has the back focal length of general length, especially focal length itself is longer, resolution requirement relatively
In the case of height, it is desirable to which back focal length length has certain difficulty more than focal length.When in application of special occasions, such as machine
Tool structural member is interfered, photosignal needs the repeatedly factors dictate back focal length such as switching imaging, consideration personnel and equipment safety
When longer, common pick-up lens is incompetent.
Content of the invention
The problem that the utility model is present for above-mentioned prior art makes improvement, i.e., skill to be solved in the utility model
Art problem is to provide a kind of high-resolution reversed telephoto lens with overlength back focal length, with strong anti-long distance architectural feature,
Optics is all longer than focal length itself with structure back focal length, reaches more than 72mm, is particularly well-suited to require that optics, structure back focal length are required
Very long occasion；Resolution of lens is high, to all energy high definition imagings of infinity distance, close-in target, adapts to mega pixel
High definition camera.
In order to solve above-mentioned technical problem, a kind of technical scheme of the present utility model is：A kind of with overlength back focal length
High-resolution reversed telephoto lens, including set gradually along light incident direction front group of eyeglass, fixed aperture and afterwards organize eyeglass, institute
Negative selenodont lens of the front group of eyeglass for positive light coke are stated, the focal power of the rear group eyeglass is negative, and the rear group eyeglass includes
First biconvex lens, the gluing unit being made up of negative selenodont lens and the second biconvex lens contiguity.
Further, the front group of airspace between eyeglass and fixed aperture is 7.6mm, fixed aperture and rear group of mirror
Airspace between piece is 6.45mm.
Further, the air gap between first biconvex lens and gluing unit is 13.75mm.
Further, first biconvex lens is made up of H-FK61 ED material.
Further, also include the lens barrel of an integrated design for wrapping all eyeglasses.
Further, the lens barrel Inner Front End is provided with the front trim ring for organizing eyeglass before spiral compression, the front group of mirror
The first adjust pad and the first spacer ring, first biconvex lens and gluing unit is disposed between piece and the first biconvex lens
Between be disposed with the second spacer ring and the second adjust pad, the first spacer ring madial wall is simultaneously as camera lens fixed aperture.
Further, the black process of the lens barrel outer surface sandblasting oxygen, the front trim ring, first, second spacer ring Surface Oxygen are black
Process.
Further, some grooves are provided with the front trim ring, the first spacer ring and the second spacer ring madial wall, those
Groove is coated with delustring paint, using scattering and absorption of the lens barrel inwall to stray light emission, so as to reach the mesh of suppression veiling glare
's.
Further, the lens barrel is cylinder, and its rear end lateral wall is provided with the external screw thread as mounting interface.
Compared with prior art, the utility model has the advantages that：The utility model provides a kind of optics, knot
Structure back focal length is all higher than the high-resolution reversed telephoto lens of focal length itself, reaches more than 72mm, therefore the non-constant width of its applicable situation
General, very long special circumstances are especially required to back focal length, big compared with common lens at aspects such as adaptability, security, popularity
Big raising；From ED（ED）Optical material, effectively reduces the aberrations such as optical lens second order spectrum, so that camera lens is existed
Work in wide spectral range, and all there is very strong detection recognition capability to infinity target, close-in target.
The utility model is described in more detail with reference to the accompanying drawings and detailed description.
Description of the drawings
Fig. 1 is the organigram of optics in the utility model embodiment.
Fig. 2 is the organigram of the utility model embodiment.
Fig. 3 is the transfer curve figure of the utility model embodiment.
In figure：Lens, trim ring before 2-, the first adjust pad of 3-, the first biconvex lens of 4-, the first spacer ring of 5-, 6- is organized before 1-
Lens barrel, the second spacer ring of 7-, the negative selenodont lens of 8- gluing unit, the second adjust pad of 9-, the second biconvex lens of 10-, 11- light
Door screen, 12- imaging target surface, distance of the L- optic back focal away from, structure back focal length.
Specific embodiment
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 organize eyeglass afterwards, the front group of eyeglass is the negative of positive light coke
Selenodont lens, described after the focal power of group eyeglass be negative, the afterwards group eyeglass includes the first biconvex lens 4, by negative selenodont
Lens 8 and the second biconvex lens 10 touch the gluing unit for constituting.
In the present embodiment, the front group of airspace between 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 first biconvex lens and gluing unit is 13.75mm.
In the present embodiment, in imaging target surface 12 be optic back focal be 73mm away from, structure back focal length apart from L.
In the present embodiment, 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 for wrapping all eyeglasses.
In the present embodiment, 6 Inner Front End of the lens barrel be provided with for before spiral compression organize eyeglass front trim ring 2, described before
The first adjust pad 3 and the first spacer ring 5, first biconvex lens are disposed between group eyeglass 1 and the first biconvex lens 4
The second spacer ring 7 and the second adjust pad 9 is disposed between 4 and gluing unit, and the first spacer ring madial wall is simultaneously as mirror
Head fixed aperture.Adjust pad is designed as general part, reduces machining kinds, is easy 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 and lens deadweight automatic centering by coordinating, makes each lens axis centering, it is ensured that
Camera lens is optimum as matter.
In the present embodiment, the black process of the lens barrel outer surface sandblasting oxygen, the front trim ring, first, second spacer ring Surface Oxygen
Black process, coordinates camera lens overall appearance.
In the present embodiment, on the front trim ring, the first spacer ring and the second spacer ring madial wall, some grooves are provided with, should
A little grooves are coated with delustring paint, using scattering and absorption of the lens barrel inwall to stray light emission, so as to reach suppression veiling glare
Purpose.
In the present embodiment, the lens barrel is provided with the external screw thread as mounting interface for cylinder, its rear end lateral wall.
Above-mentioned camera lens reaches following technical indicator：
1st, focal length：f′=60mm；
2nd, optic back focal is away from, structure back focal length：Not less than 72mm；
3rd, relative aperture D/F=1/3.5；
4th, spectral region is suitable for：400nm～700nm；
5th, resolution ratio：It is adapted to the high-definition camera of mega pixel；
6th, operating temperature：Optical passive mode is realized in the range of -40 DEG C ~+65 DEG C nothing thermalized design；
In optical design, a piece of ED used in rear group of eyeglass（ED）Optical material, first cause are：By
In the intrinsic feature of anti-long distance structure, optical power profile is for after front bearing, just, back focal length requirement is longer, and front group of eyeglass is sent out to light
Scattered effect is stronger, causes highly larger in rear group of eyeglass upper shaft glazed thread, axial direction can be greatly lowered using ED optical material
The impact of aberration especially second order spectrum aberration.Secondly, in a lot of occasions, it is desirable to which camera lens adapts to large-scale environment temperature
Change, it is not necessary to artificially focus on again, that is, realize nothing thermalized design.Wherein with optical passive mode nothing thermalized design difficulty highest,
Reliability also highest, is often negative have the characteristics that thermal refractive index coefficient due to ED optical material, it is contemplated that anti-long distance structure
Feature, can be reduced nothing thermalized design difficulty using ED optical material.
Simultaneously take account of, outside camera lens, the expansion rate in face, thermal refractive index coefficient should be less, to reduce environment temperature as far as possible
The uneven impact for bringing of degree, therefore we adopt ED optical material in rear group of eyeglass first piece, select Acclimation temperature in outside
The higher common material of property.
By coatings optimization design, make camera lens have transmitance 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.
The foregoing is only preferred embodiment of the present utility model, all done according to the utility model claim equal
Deng change and modification, should all belong to covering scope of the present utility model.
Claims (9)
1. a kind of high-resolution reversed telephoto lens with overlength back focal length, it is characterised in that：Including along light incident direction according to
Front group of eyeglass of secondary setting, fixed aperture and afterwards organize eyeglass, the front group of eyeglass for positive light coke negative selenodont lens, described
Afterwards the focal power of group eyeglass be negative, described organize afterwards eyeglass include the first biconvex lens, by negative selenodont lens and the second lenticular
The gluing unit that mirror contiguity is constituted.
2. the high-resolution reversed telephoto lens with overlength back focal length 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.
3. the high-resolution reversed telephoto lens with overlength back focal length according to claim 1 and 2, it is characterised in that：Institute
It is 13.75mm to state the air gap between the first biconvex lens and gluing unit.
4. the high-resolution reversed telephoto lens with overlength back focal length according to claim 3, it is characterised in that：Described
One biconvex lens is made up of H-FK61 ED material.
5. the high-resolution reversed telephoto lens with overlength back focal length according to claim 3, it is characterised in that：Also include
The lens barrel of one integrated design for wrapping all eyeglasses.
6. the high-resolution reversed telephoto lens with overlength back focal length according to claim 5, it is characterised in that：The mirror
Cylinder Inner Front End is provided with the front trim ring for organizing eyeglass before spiral compression, between the front group of eyeglass and the first biconvex lens successively
Be provided with the first adjust pad and the first spacer ring, be disposed between first biconvex lens and gluing unit the second spacer ring and
Second adjust pad, the first spacer ring madial wall is simultaneously as camera lens fixed aperture.
7. the high-resolution reversed telephoto lens with overlength back focal length according to claim 6, it is characterised in that：The mirror
The black process of tube outer surface sandblasting oxygen, the front trim ring, the black process of first, second spacer ring Surface Oxygen.
8. the high-resolution reversed telephoto lens with overlength back focal length according to claim 6 or 7, it is characterised in that：Institute
State on front trim ring, the first spacer ring and the second spacer ring madial wall and some grooves are provided with, those grooves are coated with delustring paint, profit
With scattering and absorption of the lens barrel inwall to stray light emission, so as to reach the purpose of suppression veiling glare.
9. the high-resolution reversed telephoto lens with overlength back focal length according to claim 5, it is characterised in that：The mirror
Cylinder is provided with the external screw thread as mounting interface for cylinder, its rear end lateral wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620940035.8U CN206002756U (en) | 2016-08-26 | 2016-08-26 | A kind of high-resolution reversed telephoto lens with overlength back focal length |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620940035.8U CN206002756U (en) | 2016-08-26 | 2016-08-26 | A kind of high-resolution reversed telephoto lens with overlength back focal length |
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| CN206002756U true CN206002756U (en) | 2017-03-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154503A (en) * | 2016-08-26 | 2016-11-23 | 福建福光股份有限公司 | A kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof |
-
2016
- 2016-08-26 CN CN201620940035.8U patent/CN206002756U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154503A (en) * | 2016-08-26 | 2016-11-23 | 福建福光股份有限公司 | A kind of high-resolution reversed telephoto lens with overlength back focal length and preparation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |