CN208013519U - High-performance visible light long-focus lens - Google Patents
High-performance visible light long-focus lens Download PDFInfo
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- CN208013519U CN208013519U CN201820325627.8U CN201820325627U CN208013519U CN 208013519 U CN208013519 U CN 208013519U CN 201820325627 U CN201820325627 U CN 201820325627U CN 208013519 U CN208013519 U CN 208013519U
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- 238000003384 imaging method Methods 0.000 claims abstract description 4
- 239000000571 coke Substances 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 27
- 230000005499 meniscus Effects 0.000 claims description 24
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 230000003595 spectral effect Effects 0.000 claims description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 1
- 238000009738 saturating Methods 0.000 claims 1
- 230000004075 alteration Effects 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Abstract
The utility model relates to a high performance visible light long focus camera lens. The lens has the characteristics of compact structure, high cost performance, high imaging quality and the like, and can meet the actual use requirements. The lens comprises a first front fixed group, a second front fixed group, a main reflector, a secondary reflector, an aperture diaphragm, a first rear fixed group and a second rear fixed group; the first front fixing group, the second front fixing group and the main reflector are sequentially arranged along the direction of emitting the visible light beam; the secondary reflector, the first rear fixed group and the second rear fixed group are sequentially arranged between the second front fixed group and the main reflector; the aperture diaphragm is arranged at the foremost end of the outer edge of the secondary reflector.
Description
Technical field
The utility model belongs to field of optical equipment, is related to a kind of high-performance visible light long focal length lens.
Background technology
High-performance visible light long focal length lens has a wide range of applications in fields such as observing and controlling, frontier defense and national defence.In addition to imaging
It is high-quality outer, include to its optical property major requirement：Object lens of large relative aperture (D/f '：Better than 1/2), wide spectrum is (with detector light
Spectrum matching：0.45 μm~0.9 μm), big visual field (silent frame：Photosurface 36mm × 24mm), operating temperature range it is wide (- 40 DEG C~
50 DEG C), low distortion (below maximum distortion 0.05%), in addition also require compact appearance, cost-effective.
The method that long focal length lens is realized at present has refraction type structure or uses aspherical refraction-reflection type structure.Former structure
Complexity, spectral width are extremely difficult to require；For the latter then due to poor using aspherical craftsmanship, cost performance is not high.
Utility model content
In order to solve the problems in background technology, the utility model provides a kind of total system that uses and uses spherical mirror
Refraction-reflection type structure has large aperture, wide spectrum, big visual field, the high-performance long focal length lens of wide operating temperature range, has structure
It is compact, cost-effective, the features such as image quality, it disclosure satisfy that actual operation requirements.
The technical scheme adopted by the utility model is that：
The high-performance visible light long focal length lens include first before fix group, second before fix group, principal reflection mirror, secondary reflection
Group is fixed after fixing group and second after mirror, aperture diaphragm, first；
It is fixed before first before group, second and fixes group and principal reflection mirror and set successively along the direction of outgoing visible light beam
It sets；
Fixed group setting is fixed before second between group and principal reflection mirror after fixing group, second after secondary mirror, first, and
And it is fixed after secondary mirror, first after group, second and fixes group and set gradually；The aperture diaphragm is arranged outside secondary mirror minute surface
Along front end；
Group is fixed before first to be made of a positive light coke biconvex lens；Group is fixed before second to be bent towards by a negative power
The meniscus lens of object space is constituted, and fixed group is equal with the fixed focal length numerical value of group before second before first, and is made of the two
The focal power of microscope group is close to zero；
Principal reflection mirror by a positive light coke bend towards the speculum group of object space at；Secondary mirror is bent towards by a positive light coke
The speculum group of image space at；
Fix that group bends towards the meniscus lens of object space by a negative power and a positive light coke bends towards object space after first
Meniscus lens forms；
The meniscus lens that group is bent towards object space by the biconvex lens and a positive light coke of positive light coke is fixed after second
Composition；
Further, fixed group thickness is 43.07mm before above-mentioned first, and fixed group thickness is 31.673mm, the before second
The meniscus lens thickness that the negative power fixed after one in group bends towards object space is 15.20mm, and the positive light focus in group is fixed after first
The meniscus lens thickness that degree bends towards object space is 10.6mm；The biconvex lens thickness for the positive light coke fixed after second in group is
23.32mm, it is 7.95mm that the positive light coke in group is fixed after second and bends towards the meniscus lens thickness of object space；
It is divided into 180.60mm between being fixed before described first before group and second between fixing group；Fixed group and master before described second
424.76mm is divided between speculum；394.6817mm is divided between principal reflection mirror and secondary mirror；Secondary mirror with
It is divided into 89.04mm between being fixed after first between group；It is divided into 0.53mm between being fixed after first after group and second between fixing group；It is described
It is fixed after second between group and outer locator photosurface and is spaced 33.31716mm.
Further, fix before above-mentioned first before group, second after fixing group, first after fixing group, second fix it is every in group
A eyeglass is equipped with positive transmission plane and reversed transmission plane；Positive transmission plane is the surface for receiving light beam, and reversed transmission plane is forward direction
The opposite face of transmission plane；
Wherein, the positive transmission curvature radius for the positive light coke biconvex lens fixed before first in group is
1541.765mm reversely transmits curvature radius -4850.905mm；
The positive transmission curvature radius that the negative power fixed before second in group bends towards the meniscus lens of object space is-
The radius of curvature of 867.7632mm, reversed transmission plane are -3454.66mm；
The positive transmission curvature radius that the meniscus lens that negative power in group bends towards object space is fixed after first is-
196.1924mm, it is -171.5255mm reversely to transmit curvature radius；The positive light coke of gluing bends towards object space therewith simultaneously
The positive transmission curvature radius of meniscus lens is -171.5255mm, and it is -427.0724mm reversely to transmit curvature radius；
The positive transmission curvature radius that the biconvex lens of positive light coke in group is fixed after second is 231.7822mm, anti-
It is -109.5195mm to transmission curvature radius；While the positive light coke of gluing bends towards the forward direction of the meniscus lens of object space therewith
Transmission curvature radius is -109.5195mm, and it is -223.4779mm reversely to transmit curvature radius；
The radius of curvature of principal reflection mirror is -1154.666mm, and the radius of curvature of secondary mirror is 4506.169mm.
Further, the focal length of above-mentioned high-performance visible light long focal length lens is 530mm, and F numbers are 1.2, spectral region
0.45 μm~1 μm, distortion≤0.035%, imaging size φ 43.6mm, system overall length 680mm.
The utility model has the beneficial effects that：
The high-performance long focal length lens of the utility model by focal length numerically close to before equal one first fixed group and
Group is fixed before one second for being corrected to spherical aberration, while the focal power of microscope group is formed close to zero by the two, thus its is several
The aberration not generated；Light path is folded by a principal reflection mirror and a secondary mirror, and the two combination light focus away from
It is equal with whole system focal power, it influenced for reducing aberration, reduce optical tube length and temperature influence；By fixed after one first
It fixes group after group and one second off-axis aberration and front microscope group residual aberration is compensated, image quality mesh is improved to realize
's.Compared with prior art, all eyeglasses are spherical mirror, there is a preferable craftsmanship, spectral width, and distortion is small, image quality compared with
Good, focal length 530mm, F numbers are 1.2, and system overall length is 680mm, disclosure satisfy that actual operation requirements.
Description of the drawings
Specific embodiment of the utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the index path of the utility model camera lens.
Fig. 2 is the MTF curve figure of the utility model camera lens.
Fig. 3 is the point range figure of the utility model camera lens
Fig. 4 is song, the distortion curve figure of the utility model camera lens.
When Fig. 5 is -40 DEG C of operating temperature, the MTF curve figure of the utility model camera lens.
When Fig. 6 is 50 DEG C of operating temperature, the MTF curve figure of the utility model camera lens.
Reference numeral is as follows：
It is fixed before 1- first before group, 2- second after fixing group, 3- principal reflection mirrors, 4- secondary mirrors, 5- first and fixes group, 6-
Group, 7- outer locators photosurface, 8- aperture diaphragms are fixed after second.
Specific implementation mode
530mm high-performance long focal length lens optical systems as shown in Figure 1, using 6 group of 8 catadioptric structure of chip, including
Before one group 5 and second is fixed after fixed group 2, principal reflection mirror 3, secondary mirror 4, aperture diaphragm 8, first before fixed group 1, second
Fixed group 6 afterwards；
Before first before fixed group 1, second fixed group 2 and principal reflection mirror 3 along outgoing visible light beam direction successively
Setting；
After secondary mirror 4, first after fixed group 5, second fixed group 6 be arranged before second fixed group 2 and principal reflection mirror 3 it
Between, and fixed group 6 is set gradually after fixed group 5, second after secondary mirror 4, first；The setting of the aperture diaphragm 8 is secondary anti-
It penetrates at 4 minute surface outer front end of mirror；
Fixed group 1 is made of a positive light coke biconvex lens before first；Fixed group 2 is curved by a negative power before second
It is constituted to the meniscus lens of object space, and the focal length numerical value of fixed group 2 is equal before fixed group 1 and second before first, and by the two
The focal power of microscope group is formed close to zero；
Principal reflection mirror 3 by a positive light coke bend towards the speculum group of object space at；Secondary mirror 4 is curved by a positive light coke
To image space speculum group at；
Fixed group 5 bends towards the meniscus lens of object space by a negative power after first and a positive light coke bends towards object space
Meniscus lens forms；
Fixed group 6 is bent towards the meniscus lens of object space by the biconvex lens and a positive light coke of positive light coke after second
Composition.
The light path conduct route of the camera lens is as follows：Visible light is successively after fixed group 2 before fixed group 1 and second before first
Secondary mirror 4 is reflexed to by principal reflection mirror 3, after passing sequentially through first after being reflected using secondary mirror 4 after fixed group 5 and second
Fixed group 6 collects on outer locator photosurface 7.
Fixed group 2 before fixed group 1 and second, is used for spherical aberration and chromatic aberration correction before first；Principal reflection mirror 3 and secondary mirror 4,
For folding light path, realizing system focal power, less aberration and shortening tube length；The effect of aperture diaphragm 8 is that limitation enters camera lens
Beam diameter size acts on, and size and location is directly related with aberration, is related to final image quality.Optical lens mesoporous
Diameter light bar is usually a certain mechanical structure, such as frame.By fixed group 6 after fixed group 5 and second after first for off-axis image
A poor and preceding group residual aberration compensates, and realizes system aberration balance, is finally imaged within the scope of φ 43.6mm.
Wherein, it fixes before first before group, second after fixing group, principal reflection mirror, secondary mirror, first and fixes group and second
Afterwards the parameter of fixed group and between relationship it is as shown in table 1：
Table 1
It should be noted that except outside face serial number 5,6, face serial number odd number is positive transmission plane, and even number is anti-
To transmission plane.
Fig. 2,3,4,5,6 are respectively -40 DEG C of system MTF curve, point range figure and the curvature of field, distortion curve figure, operating temperature light
The MTF curve figure of 50 DEG C of optical systems of MTF curve figure and operating temperature of system, it can be seen that system has higher property
Can, including (0.45) as shown in Figure 2,3, spatial frequency 50l p/mm, full filed MTF are better than preferable image quality, full filed
Distortion is smaller (as shown in figure 4, maximum field of view's distortion is less than 0.035%), larger operating temperature range (as shown in Figure 5,6, temperature
Variation range is spent in -40 DEG C~50 DEG C, and full filed MTF is better than 0.45) disclosure satisfy that observing and controlling and national defence requirement.
Claims (4)
1. a kind of high-performance visible light long focal length lens, it is characterised in that：Group, master are fixed including fixing before group, second before first
Group is fixed after fixing group and second after speculum, secondary mirror, aperture diaphragm, first；
It is fixed before first before group, second and fixes group and principal reflection mirror and set gradually along the direction of outgoing visible light beam；
Fixed group setting is fixed before second between group and principal reflection mirror after fixing group, second after secondary mirror, first, and secondary
It is fixed after speculum, first after group, second and fixes group and set gradually；Aperture diaphragm setting secondary mirror minute surface outer most
At front end；
Group is fixed before first to be made of a positive light coke biconvex lens；Group is fixed before second, and object space is bent towards by a negative power
Meniscus lens constitute, and before first fixed group and before second fixed group focal length numerical value it is equal, and microscope group is formed by the two
Focal power close to zero；
Principal reflection mirror by a positive light coke bend towards the speculum group of object space at；Secondary mirror bends towards image space by a positive light coke
Speculum group at；
Fix that group bends towards the meniscus lens of object space by a negative power and a positive light coke bends towards the bent moon of object space after first
Lens form；
The meniscus lens that group bends towards object space by the biconvex lens and a positive light coke of positive light coke is fixed after second to form.
2. high-performance visible light long focal length lens according to claim 1, it is characterised in that：
Fixed group thickness is 43.07mm before described first, and it is 31.673mm that group thickness is fixed before second, is fixed in group after first
The meniscus lens thickness that negative power bends towards object space is 15.20mm, and fixing the positive light coke in group after first bends towards the curved of object space
Month lens thickness is 10.6mm；The biconvex lens thickness that the positive light coke in group is fixed after second is 23.32mm, is fixed after second
The meniscus lens thickness that positive light coke in group bends towards object space is 7.95mm；
It is divided into 180.60mm between being fixed before described first before group and second between fixing group；Group and principal reflection are fixed before described second
424.76mm is divided between mirror；394.6817mm is divided between principal reflection mirror and secondary mirror；Secondary mirror and first
Afterwards fix group between be divided into 89.04mm；It is divided into 0.53mm between being fixed after first after group and second between fixing group；Described second
It fixes afterwards and is spaced 33.31716mm between group and outer locator photosurface.
3. high-performance visible light long focal length lens according to claim 2, it is characterised in that：Fixed before described first group,
It is fixed before second after group, first after fixing group, second and fixes each eyeglass in group and be equipped with positive transmission plane and reversed transmission plane；Just
It is the surface for receiving light beam to transmission plane, reversed transmission plane is the opposite face of positive transmission plane；
Wherein, the positive transmission curvature radius that the positive light coke biconvex lens in group is fixed before first is 1541.765mm,
Reversed transmission curvature radius -4850.905mm；
The positive transmission curvature radius that the negative power fixed before second in group bends towards the meniscus lens of object space is-
The radius of curvature of 867.7632mm, reversed transmission plane are -3454.66mm；
The positive transmission curvature radius that the meniscus lens that negative power in group bends towards object space is fixed after first is-
196.1924mm, it is -171.5255mm reversely to transmit curvature radius；The positive light coke of gluing bends towards object space therewith simultaneously
The positive transmission curvature radius of meniscus lens is -171.5255mm, and it is -427.0724mm reversely to transmit curvature radius；
The positive transmission curvature radius that the biconvex lens of positive light coke in group is fixed after second is 231.7822mm, reversed saturating
It is -109.5195mm to penetrate curvature radius；The forward direction for the meniscus lens that the positive light coke of gluing bends towards object space therewith simultaneously transmits
Curvature radius is -109.5195mm, and it is -223.4779mm reversely to transmit curvature radius；The radius of curvature of principal reflection mirror
Radius of curvature for -1154.666mm, secondary mirror is 4506.169mm.
4. high-performance visible light long focal length lens according to claim 2, it is characterised in that：The high-performance visible light is long
The focal length of focal length lens is 530mm, and F numbers are 1.2,0.45 μm~1 μm of spectral region, distortion≤0.035%, imaging size φ
43.6mm, system overall length 680mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820325627.8U CN208013519U (en) | 2018-03-09 | 2018-03-09 | High-performance visible light long-focus lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820325627.8U CN208013519U (en) | 2018-03-09 | 2018-03-09 | High-performance visible light long-focus lens |
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| Publication Number | Publication Date |
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| CN208013519U true CN208013519U (en) | 2018-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820325627.8U Active CN208013519U (en) | 2018-03-09 | 2018-03-09 | High-performance visible light long-focus lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333719A (en) * | 2018-03-09 | 2018-07-27 | 中国科学院西安光学精密机械研究所 | High-performance visible light long-focus lens |
-
2018
- 2018-03-09 CN CN201820325627.8U patent/CN208013519U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333719A (en) * | 2018-03-09 | 2018-07-27 | 中国科学院西安光学精密机械研究所 | High-performance visible light long-focus lens |
| CN108333719B (en) * | 2018-03-09 | 2022-12-27 | 中国科学院西安光学精密机械研究所 | Visible 530mm focal length lens |
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