CN108008528B - Axial zoom short wave three-view-field optical system - Google Patents
Axial zoom short wave three-view-field optical system Download PDFInfo
- Publication number
- CN108008528B CN108008528B CN201710997229.0A CN201710997229A CN108008528B CN 108008528 B CN108008528 B CN 108008528B CN 201710997229 A CN201710997229 A CN 201710997229A CN 108008528 B CN108008528 B CN 108008528B
- Authority
- CN
- China
- Prior art keywords
- lens
- radius
- lens group
- optical system
- axial
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0081—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. enlarging, the entrance or exit pupil
-
- 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
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to an axial zoom short-wave three-field optical system, which is designed to be applied to a short-wave 0.9-1.7 mu m wave band and has focal lengths of 40mm, 120mm and 360mm respectively; the large, medium and small fields of view are realized through the movement of the zoom group and the compensation group, the thermal defocusing compensation is realized through the movement of the compensation group, and the imaging in a larger temperature range is realized; the adjustable F number of the large, medium and small fields is realized by adopting the variable diaphragm, so that the light transmission aperture of the system is selected as required, and overexposure is prevented by control; the common visible light glass material is selected, the spherical surface is used for realizing high image quality, and no aspheric surface is used. The optical system is an infrared three-field-of-view imaging system working in a wave band of 0.9-1.7 mu m, and the design of 9 times of zoom ratio in an axial moving mode is realized; all are spherical lenses, and the common optical glass with stock is adopted, so that the material is easy to obtain and process.
Description
Technical Field
The invention belongs to a three-field optical system, and particularly relates to an axial zoom short-wave three-field optical system.
Background
The thermal imager working in the short wave infrared band has the design characteristics of a camera of visible light and the energy characteristics of a medium-long wave thermal infrared imager, and belongs to a thermal imager between the radiation energy theory and the photometric theory. The device can realize the limit of penetrating smoke, fog, haze, snow and the like and the capability of identifying camouflage, and can realize remote and all-weather observation of high-temperature tail flame targets such as airplanes, missiles and the like.
Although the material of the optical system working in the visible light (0.4-0.8 μm) wave band can be applied to the short wave optical system, the dispersion coefficients of the optical materials are different and the surface of the lens is coated with different films due to different wave bands, so that the visible light lens or the optical system cannot be directly applied to the imaging of the short wave band. That is, although the materials are of the same name, the substantial properties are far from each other. The development of short-wave detectors is hindered, and short-wave infrared optical systems have not been paid sufficient attention.
The realization modes of the infrared three-view-field zoom optical system at home and abroad are a radial incision mode and an axial movement mode. The radial cut-in mode three-view-field optical system realizes the conversion of three view fields in a mode of switching different zoom lens groups, and the mode has the advantages that the narrow view field has the highest optical axis precision and the highest optical transmittance. The disadvantages are that the radial size of the system is overlarge, the movement mechanism is complex and the weight is heavy due to the adoption of the radial switching mode. The axial movement type three-view-field optical system realizes the conversion of three view fields through different positions of the zoom lens group and the compensating lens group on an optical axis, and the axial movement type three-view-field optical system has the advantages of small volume and light weight.
Patent CN104297899A discloses a large-field passive athermalization short-wave infrared optical system, which works at 0.9-2.5 μm, is composed of six lenses, and introduces an aspheric surface, the F number is 1.4, and the focal length is 24.7 mm. However, because the optical system is a single-view field optical system, the requirements of detection and identification of multiple view fields cannot be met, and the acting distance is limited.
Three-field optical systems working in medium-long wave infrared band have been reported, for example, CN103558679B discloses a long-wave three-field optical system with focal lengths of 20mm, 92mm and 560 mm. Three fields of view are achieved by moving a set of lenses axially and cutting into a piece of flat glass. Also, as disclosed in CN104297923A, the two-component three-field infrared optical system realizes three-field design by axial zoom and mechanical compensation. However, the working wave band is long wave or medium wave, so that the infrared short wave three-field optical system cannot be applied to a short wave imaging system, and the infrared short wave three-field optical system is not reported yet.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides an axial zoom short-wave three-field optical system which can realize three-field imaging and realize the function of changing the F number under the condition of ensuring the optical imaging quality of each field of the optical system. Three fields of view are realized through the movement of the zoom group 3 and the compensation group 4, the thermal defocusing compensation is realized through the movement of the compensation group 4, and the imaging in a larger temperature range is realized.
Technical scheme
An axial zoom short-wave three-field-of-view optical system is characterized by comprising an object plane 1, a front fixed lens group 2, a zoom lens group 3, a compensation lens group 4, a variable-aperture diaphragm 5, a rear fixed lens group 6 and a detector image plane 7, wherein the front surface of the same lens entity is a surface close to the object plane 1, and the rear surface is a surface close to the image plane 7; the front fixed lens group 2 comprises a biconvex positive lens 201, a biconcave negative lens 202 and a meniscus positive lens 203, and the axial center distances among the three lenses are 4.3mm and 0.5mm in sequence from the object plane to the image plane; (ii) a The zoom lens group 3 comprises a meniscus negative lens 301, a biconcave negative lens 302, a biconvex positive lens 303 and a biconcave negative lens 304, and the axial center distances among the four lenses are 15.6mm, 0.5mm and 2.3mm in sequence from the object plane to the image plane; the compensation lens group 4 comprises a biconvex positive lens 401, a meniscus negative lens 402 and a meniscus positive lens 403, and the axial center distances among the three lenses are 0.5mm and 0.8mm in sequence from the object plane to the image plane; the rear fixed lens group 6 comprises a positive meniscus lens 601, a negative meniscus lens 602 and a positive meniscus lens 603, the axial center distance between the positive meniscus lens 601 and the variable aperture diaphragm 5 is 0.5mm, and the axial center distances between the three lenses are 3.2mm, 3mm and 3.1mm from the object plane to the image plane in sequence;
adjusting the axial center distance between the front fixed lens group 2 and the zooming lens group 3 to be 3mm, the axial center distance between the zooming lens group 3 and the compensation lens group 4 to be 145.9mm, and the axial center distance between the compensation lens group 4 and the variable-aperture diaphragm 5 to be 3mm to form a large-view-field light path of the optical system, wherein the full aperture of the variable-aperture diaphragm 5 is 38.9 mm;
adjusting the axial center distance between the front fixed lens group 2 and the zoom lens group 3 to be 53.6mm, the axial center distance between the zoom lens group 3 and the compensation lens group 4 to be 86.5mm, and the axial center distance between the compensation lens group 4 and the variable-aperture diaphragm 5 to be 11.7mm to form a field-of-view light path in the optical system, wherein the total aperture of the variable-aperture diaphragm 5 is about 19.3 mm;
the axial center distance between the fixed lens group 2 and the zooming lens group 3 is 59.5mm before adjustment, the axial center distance between the zooming lens group 3 and the compensation lens group 4 is 3mm, the axial center distance between the compensation lens group 4 and the variable-aperture diaphragm 5 is 89.4mm, a small view field light path of the optical system is formed, and the full aperture of the variable-aperture diaphragm 5 is 12.9mm at the moment.
The aperture of the variable aperture diaphragm 5 is adjusted by a motor, the small view field is 6, the middle view field is 4, and the large view field is 2.
The glass material of the biconvex positive lens 201 is HZK20, the radius of the front surface is 133mm, the radius of the rear surface is-249, the center thickness of the lens is 29mm, and the full aperture is 134 mm; the double-concave negative lens 202 is made of HZF62 glass material, the radius of the front surface is-229 mm, the radius of the rear surface is 345mm, the center of the lens is 3mm thick, and the full aperture is 127 mm; the meniscus positive lens 203 is made of HZK20 glass material, the radius of the front surface is 120mm, the radius of the rear surface is 2730mm, the center thickness of the lens is 17mm, and the full aperture is 119 mm.
The glass material of the negative meniscus lens 301 is HFK61, the radius of the front surface is 124mm, the radius of the rear surface is 40mm, the center thickness of the lens is 6mm, and the caliber is 65; the double-concave negative lens 302 is made of HFK61 glass material, the radius of the front surface is-69 mm, the radius of the rear surface is 72mm, the center thickness of the lens is 3mm, and the full aperture is 52 mm; the biconvex positive lens 303 is made of HZF62, the radius of the front surface is 57mm, the radius of the rear surface is-159 mm, the center thickness of the lens is 11mm, and the full aperture is 53 mm.
The double-concave negative lens 304 is made of HZLAF52, the radius of the front surface is-86 mm, the radius of the rear surface is 75mm, the center of the lens is 3mm in thickness, and the full aperture is 52; the biconvex positive lens 401 is made of HZK20, the radius of the front surface is 60mm, the radius of the rear surface is about-381, the center thickness of the lens is 9mm, and the full aperture is 51 mm; the meniscus negative lens 402 is made of HZF62 glass material, the radius of the front surface is 70mm, the radius of the rear surface is 34mm, the center thickness of the lens is 3mm, and the full aperture is 49 mm; the meniscus positive lens 403 is made of HFK61 glass material, the radius of the front surface is 35mm, the radius of the rear surface is 19000mm, the thickness of the center of the lens is 11mm, and the full aperture is 45 mm.
The meniscus positive lens 601 is made of HZK20 glass material, the radius of the front surface is 82mm, the radius of the rear surface is 272, the center thickness of the lens is 4mm, and the full aperture is 38 mm; the meniscus negative lens 602 is made of HZF62 glass material, the radius of the front surface is-84 mm, the radius of the rear surface is-136 mm, the center thickness of the lens is 3mm, and the full aperture is 37 mm; the meniscus positive lens 603 is made of HZK20 glass material, the radius of the front surface is-127 mm, the radius of the rear surface is-77 mm, the center of the lens is 3mm thick, and the full aperture is 32 mm.
Advantageous effects
According to the axial zoom short-wave three-field optical system provided by the invention, an axial zoom and mechanical compensation method is adopted according to a visible light optical system design method, and the axial zoom three-field optical system applied to a short-wave 0.9-1.7 mu m wave band is designed, wherein the focal lengths are respectively 40mm, 120mm and 360 mm; the large, medium and small fields of view are realized by the movement of the zoom group 3 and the compensation group 4, the thermal defocusing compensation is realized by the movement of the compensation group 4, and the imaging in a larger temperature range is realized; the adjustable F number of the large, medium and small fields is realized by adopting the variable diaphragm, so that the light transmission aperture of the system is selected as required, and overexposure is prevented by control; the common visible light glass material is selected, the spherical surface is used for realizing high image quality, and no aspheric surface is used.
Has the advantages that:
1. the optical system is an infrared three-field-of-view imaging system working in a wave band of 0.9-1.7 mu m, and the design of 9 times of zoom ratio in an axial moving mode is realized;
2. the F number is variable, the small visual field is 6, the middle visual field is 4, and the large visual field is 2, so that the light entering amount is adjusted to prevent overexposure;
3. all the lenses are spherical lenses, and the common optical glass with stock is adopted, so that the materials are easy to obtain and process;
4. the application of the iris diaphragm can realize the adjustment of the image plane illumination of the system and reduce the processing difficulty of the rear-end electronic white balance.
Drawings
FIG. 1 is a structural view of a large field of view optical system of the present invention;
FIG. 2 is a view of the structure of the intermediate field optical system of the present invention;
FIG. 3 is a view of the small field of view optical system configuration of the present invention;
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
the optical system comprises an object plane 1 at infinity, a front fixed lens group 2, a zoom lens group 3, a compensation lens group 4, a variable-aperture diaphragm 5, a rear fixed lens group 6 and a detector image plane 7. The front surface of the same lens entity is a surface close to the object plane 1, and the rear surface is a surface close to the image plane 7, which will not be described in detail below.
The optical path direction sequentially comprises an object plane 1 at infinity, a front fixed lens group 2, a zoom lens group 3, a compensation lens group 4, a variable-aperture diaphragm 5, a rear fixed lens group 6 and a detector image plane 7. The front fixed group consists of three lenses, namely a biconvex positive lens 201, a biconcave negative lens 202 and a meniscus positive lens 203; the zoom lens group consists of four lenses, a meniscus negative lens 301, a biconcave negative lens 302, a biconvex positive lens 303 and a biconcave negative lens 304; the compensation lens group consists of three lenses, namely a double convex positive lens 401, a meniscus negative lens 402 and a meniscus positive lens 403; the rear fixed group consists of three lenses, a positive meniscus lens 601, a negative meniscus lens 602, and a positive meniscus lens 603.
The front fixed group consists of three lenses, namely a biconvex positive lens 201, a biconcave negative lens 202 and a meniscus positive lens 203: the lens 201 glass material is HZK20, the radius of the front surface is about 133mm, the radius of the rear surface is about-249, the center thickness of the lens is about 29mm, and the full aperture is about 134 mm; the lens 202 glass material is HZF62, the front surface radius is about-229 mm, the back surface radius is about 345mm, the lens center thickness is about 3mm, and the full aperture is about 127 mm; the lens 203 glass material is HZK20, the front surface radius is about 120mm, the back surface radius is about 2730mm, the lens center thickness is about 17mm, and the full aperture is about 119 mm. The axial center distance between the three lenses is about 4.3mm and 0.5mm in sequence from left to right (i.e. from the object plane to the image plane, which will not be described in detail below).
The variable power lens group consists of four lenses, a meniscus negative lens 301, a biconcave negative lens 302, a biconvex positive lens 303 and a biconcave negative lens 304: the lens 301 glass material was HFK61, with a front surface radius of about 124mm, a back surface radius of about 40mm, a lens center thickness of about 6mm, and a lens aperture of about 65; the lens 302 glass material was HFK61, with a front surface radius of about-69 mm, a back surface radius of about 72mm, a lens center thickness of about 3mm, and a full aperture of about 52 mm; the lens 303 glass material is HZF62, the front surface radius is about 57mm, the back surface radius is about-159 mm, the lens center thickness is about 11mm, and the full aperture is about 53 mm; the lens 304 glass material was HZLAF52, with an anterior surface radius of about-86 mm, a posterior surface radius of about 75mm, a lens center thickness of about 3mm, and a full aperture of about 52. The axial center distance between the four lenses is about 15.6mm, 0.5mm and 2.3mm from left to right in sequence.
The compensation lens group consists of three lenses, namely a double convex positive lens 401, a meniscus negative lens 402 and a meniscus positive lens 403; the lens 401 glass material is HZK20, the radius of the front surface is about 60mm, the radius of the back surface is about-381, the thickness of the center of the lens is about 9mm, and the full aperture is about 51 mm; the lens 402 glass material is HZF62, the front surface radius is about 70mm, the back surface radius is about 34mm, the lens center thickness is about 3mm, and the full aperture is about 49 mm; the lens 403 glass material was HFK61, with a front surface radius of about 35mm, a back surface radius of about 19000mm, a lens center thickness of about 11mm, and a full aperture of about 45 mm. The axial center distance between the three lenses is about 0.5mm and 0.8mm from left to right in sequence.
The rear fixed group consists of three lenses, a positive meniscus lens 601, a negative meniscus lens 602, and a positive meniscus lens 603. The glass material of the lens 601 is HZK20, the radius of the front surface is about 82mm, the radius of the rear surface is about 272, the thickness of the center of the lens is about 4mm, and the full aperture is about 38 mm; the lens 602 glass material is HZF62, the front surface radius is about-84 mm, the back surface radius is about-136 mm, the lens center thickness is about 3mm, and the full aperture is about 37 mm; the lens 603 glass material was HZK20, with a front surface radius of about-127 mm, a back surface radius of about-77 mm, a lens center thickness of about 3mm, and a full aperture of about 32 mm. The distance between the lens 601 and the axial center of the variable aperture diaphragm 5 is 0.5 mm. The axial center distance between the three lenses is about 3.2mm, 3mm and 3.1mm from left to right in sequence.
When the zoom lens group 3 and the compensation lens group 4 are in the positions shown in fig. 1, a large-field optical path of the optical system is formed; the axial center distance between the lens group 2 and the lens group 3 is about 3mm, the axial center distance between the lens group 3 and the lens group 4 is about 145.9mm, the axial center distance between the lens group 4 and the variable aperture diaphragm 5 is about 3mm, and a large-view-field light path of the optical system is formed, wherein the full aperture of the variable aperture diaphragm 5 is about 38.9 mm;
when the zoom lens group 3 and the compensation lens group 4 move close to each other along the axial direction and are in the position shown in fig. 2, a field optical path in the optical system is formed; the axial center distance between the lens group 2 and the lens group 3 is about 53.6mm, the axial center distance between the lens group 3 and the lens group 4 is about 86.5mm, the axial center distance between the lens group 4 and the variable aperture diaphragm 5 is about 11.7mm, a view field light path in the optical system is formed, and the full aperture of the variable aperture diaphragm 5 is about 19.3 mm;
when the zoom lens group 3 and the compensation lens group 4 continue to move close to each other in the axial direction, in the position shown in fig. 3, a small field optical path of the optical system is formed. The axial center distance between the lens group 2 and the lens group 3 is about 59.5mm, the axial center distance between the lens group 3 and the lens group 4 is about 3mm, the axial center distance between the lens group 4 and the variable aperture diaphragm 5 is about 89.4mm, a small view field light path of the optical system is formed, and the full aperture of the variable aperture diaphragm 5 is about 12.9 mm.
The lens group moves linearly along the guide rail or the polished rod under the drive of the stepping motor. When the temperature changes, the compensation of thermal defocusing can be realized by moving the compensation lens group 4 back and forth, namely, a mechanical passive heat difference elimination method is adopted. The aperture of the variable aperture diaphragm 5 can be adjusted by the motor, so that the adjustment of the F number under different fields of view is realized, and meanwhile, the adjustment of the image surface illumination under different bright and dark fields of view can be realized.
The lens group moves linearly along the guide rail or the polished rod under the drive of the stepping motor. The compensation of thermal defocus can be achieved by moving the compensation lens group 4 back and forth when the temperature changes.
The aperture of the variable aperture diaphragm 5 can be adjusted by the motor, so that the adjustment of the F number under different fields of view is realized, and meanwhile, the adjustment of the image surface illumination under different bright and dark fields of view can be realized.
The large field focal length is 360mm (F number is 6), the medium field focal length is 120mm (F number is 4), and the small field focal length is 40mm (F number is 2); the system adopts a primary imaging mode; the axial space length from the first surface of the system, the front surface of the lens 201, to the image surface of the detector is 360 mm. Distortion in the whole field of view is respectively less than or equal to 3.5%, 1.5% and 0.06%. The MTF evaluation in the whole field is respectively more than or equal to 0.597, 0.714 and 0.629 in the large, middle and small fields at 20 lp/mm.
The detector is a shortwave infrared focal plane detector with the pixel number of 640 multiplied by 512 and the pixel size of 25 mu m, and the detector is applicable to wavelength: 0.9-1.7 μm; center wavelength: 1.3 μm; effective imaging area: 16mm by 12.8 mm.
Claims (6)
1. An axial zooming short-wave three-field optical system is characterized by comprising an object plane (1), a front fixed lens group (2), a zooming lens group (3), a compensation lens group (4), a variable-aperture diaphragm (5), a rear fixed lens group (6) and a detector image plane (7), wherein the front surface of the same lens entity is a surface close to the object plane (1), and the rear surface is a surface close to the image plane (7); the front fixed lens group (2) comprises a first biconvex positive lens (201), a first biconcave negative lens (202) and a first meniscus positive lens (203), and the axial center distances among the three lenses are 4.3mm and 0.5mm in sequence from the object plane to the image plane; the zoom lens group (3) comprises a first meniscus negative lens (301), a second biconcave negative lens (302), a second biconvex positive lens (303) and a third biconcave negative lens (304), and the axial center distances among the four lenses are 15.6mm, 0.5mm and 2.3mm from the object plane to the image plane in sequence; the compensation lens group (4) comprises a third biconvex positive lens (401), a second negative meniscus lens (402) and a second positive meniscus lens (403), and the axial center distances among the three lenses are 0.5mm and 0.8mm in sequence from the object plane to the image plane; the rear fixed lens group (6) comprises a third positive meniscus lens (601), a third negative meniscus lens (602) and a fourth positive meniscus lens (603), the distance between the third positive meniscus lens (601) and the axial center of the variable aperture diaphragm (5) is 0.5mm, and the axial center distances between the three lenses are 3.2mm, 3mm and 3.1mm in sequence from the object plane to the image plane;
adjusting the axial center distance between the front fixed lens group (2) and the zooming lens group (3) to be 3mm, the axial center distance between the zooming lens group (3) and the compensation lens group (4) to be 145.9mm, the axial center distance between the compensation lens group (4) and the variable-aperture diaphragm (5) to be 3mm, forming a large-view-field light path of the optical system, wherein the full aperture of the variable-aperture diaphragm (5) is 38.9 mm;
adjusting the axial center distance between the front fixed lens group (2) and the zooming lens group (3) to be 53.6mm, the axial center distance between the zooming lens group (3) and the compensation lens group (4) to be 86.5mm, and the axial center distance between the compensation lens group (4) and the variable-aperture diaphragm (5) to be 11.7mm to form a field-of-view light path in the optical system, wherein the full aperture of the variable-aperture diaphragm (5) is about 19.3 mm;
the axial center distance between the fixed lens group (2) and the zooming lens group (3) is 59.5mm before adjustment, the axial center distance between the zooming lens group (3) and the compensation lens group (4) is 3mm, the axial center distance between the compensation lens group (4) and the variable-aperture diaphragm (5) is 89.4mm, a small view field light path of the optical system is formed, and the full aperture of the variable-aperture diaphragm (5) is 12.9mm at the moment.
2. The axial zoom shortwave three-field-of-view optical system of claim 1, wherein: the aperture of the variable aperture diaphragm (5) is adjusted through a motor, the F number of a small view field is 6, the F number of a middle view field is 4, and the F number of a large view field is 2.
3. The axial zoom shortwave three-field-of-view optical system of claim 1, wherein: the first biconvex positive lens (201) is made of HZK20 glass material, the radius of the front surface is 133mm, the radius of the rear surface is-249 mm, the center thickness of the lens is 29mm, and the full aperture is 134 mm; the first biconcave negative lens (202) is made of HZF62 glass material, the radius of the front surface is-229 mm, the radius of the rear surface is 345mm, the center thickness of the lens is 3mm, and the full aperture is 127 mm; the first positive meniscus lens (203) is made of HZK20 glass material, the radius of the front surface is 120mm, the radius of the rear surface is 2730mm, the center thickness of the lens is 17mm, and the full aperture is 119 mm.
4. The axial zoom shortwave three-field-of-view optical system of claim 1, wherein: the first negative meniscus lens (301) is made of HFK61 glass material, the radius of the front surface is 124mm, the radius of the rear surface is 40mm, the center thickness of the lens is 6mm, and the caliber is 65 mm; the second biconcave negative lens (302) is made of HFK61 glass material, the radius of the front surface is-69 mm, the radius of the rear surface is 72mm, the center thickness of the lens is 3mm, and the full aperture is 52 mm; the second biconvex positive lens (303) is made of HZF62, the radius of the front surface is 57mm, the radius of the rear surface is-159 mm, the center thickness of the lens is 11mm, and the full aperture is 53 mm.
5. The axial zoom shortwave three-field-of-view optical system of claim 1, wherein: the third biconcave negative lens (304) is made of HZLAF52 glass material, the radius of the front surface is-86 mm, the radius of the rear surface is 75mm, the center thickness of the lens is 3mm, and the full aperture is 52 mm; the third biconvex positive lens (401) is made of HZK20, the radius of the front surface is 60mm, the radius of the rear surface is about-381 mm, the center thickness of the lens is 9mm, and the full aperture is 51 mm; the second negative meniscus lens (402) is made of HZF62 glass material, the radius of the front surface is 70mm, the radius of the rear surface is 34mm, the center thickness of the lens is 3mm, and the full aperture is 49 mm; the glass material of the second positive meniscus lens (403) is HFK61, the radius of the front surface is 35mm, the radius of the rear surface is 19000mm, the center of the lens is 11mm thick, and the full aperture is 45 mm.
6. The axial zoom shortwave three-field-of-view optical system of claim 1, wherein: the third positive meniscus lens (601) is made of HZK20 glass material, the radius of the front surface is 82mm, the radius of the rear surface is 272mm, the center thickness of the lens is 4mm, and the full aperture is 38 mm; the third negative meniscus lens (602) is made of HZF62, the radius of the front surface is-84 mm, the radius of the rear surface is-136 mm, the center thickness of the lens is 3mm, and the full aperture is 37 mm; the fourth positive meniscus lens (603) is made of HZK20 glass material, the radius of the front surface is-127 mm, the radius of the rear surface is-77 mm, the center thickness of the lens is 3mm, and the full aperture is 32 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710997229.0A CN108008528B (en) | 2017-10-24 | 2017-10-24 | Axial zoom short wave three-view-field optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710997229.0A CN108008528B (en) | 2017-10-24 | 2017-10-24 | Axial zoom short wave three-view-field optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108008528A CN108008528A (en) | 2018-05-08 |
| CN108008528B true CN108008528B (en) | 2020-02-14 |
Family
ID=62051777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710997229.0A Active CN108008528B (en) | 2017-10-24 | 2017-10-24 | Axial zoom short wave three-view-field optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108008528B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781143A (en) * | 2019-01-25 | 2019-05-21 | 苏州大学 | A kind of athermal Dynamic Star simulator optical system |
| CN110543004B (en) * | 2019-08-27 | 2024-06-21 | 杭州图谱光电科技有限公司 | High-magnification large-zoom-ratio digital microscope objective lens |
| CN110780420A (en) * | 2019-10-08 | 2020-02-11 | 中国电子科技集团公司第十一研究所 | Optical system of variable F-number thermal infrared imager |
| CN112764298B (en) * | 2021-01-31 | 2022-10-11 | 迪擎光电(台州)有限责任公司 | Projection lens system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410793A (en) * | 2001-09-28 | 2003-04-16 | 佳能株式会社 | Focal length extending lens and camera with same |
| JP2005266183A (en) * | 2004-03-18 | 2005-09-29 | Sigma Corp | Telephotographic zoom lens |
| CN102354078A (en) * | 2011-09-28 | 2012-02-15 | 福建福光数码科技有限公司 | Infrared illuminating, zooming and light-condensing lens |
| CN102466871A (en) * | 2010-11-16 | 2012-05-23 | 佳能株式会社 | Zoom lens and optical device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10310241B2 (en) * | 2016-02-29 | 2019-06-04 | Ricoh Imaging Company, Ltd. | Zoom lens system |
-
2017
- 2017-10-24 CN CN201710997229.0A patent/CN108008528B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410793A (en) * | 2001-09-28 | 2003-04-16 | 佳能株式会社 | Focal length extending lens and camera with same |
| JP2005266183A (en) * | 2004-03-18 | 2005-09-29 | Sigma Corp | Telephotographic zoom lens |
| CN102466871A (en) * | 2010-11-16 | 2012-05-23 | 佳能株式会社 | Zoom lens and optical device |
| CN102354078A (en) * | 2011-09-28 | 2012-02-15 | 福建福光数码科技有限公司 | Infrared illuminating, zooming and light-condensing lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108008528A (en) | 2018-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108008528B (en) | Axial zoom short wave three-view-field optical system | |
| CN110221420B (en) | Double-field-of-view common-aperture off-axis three-mirror optical system and design method | |
| CN112180574B (en) | Endoscope adaptive lens | |
| CN106772959B (en) | Short-wave and long-wave infrared dual-waveband confocal-surface large-relative-aperture optical system | |
| CN213122420U (en) | Endoscope adaptive lens | |
| CN109597187B (en) | Large-caliber long-focal-length passive athermalized visible light optical system | |
| CN109343201B (en) | Low-distortion wide-angle long-wave uncooled infrared optical system for optical passive heat difference elimination | |
| CN110716297B (en) | Long-focus large-target-surface infrared continuous zooming optical system | |
| CN110658613A (en) | Miniaturized large-zoom-ratio medium-wave refrigeration infrared continuous zooming optical system | |
| CN110543001B (en) | Miniaturized large-zoom-ratio medium-wave refrigeration infrared continuous zooming optical system | |
| CN108572433B (en) | Binary surface high-power zoom lens | |
| CN114460728B (en) | Microminiature medium wave refrigerating infrared continuous zooming optical system | |
| CN114488494B (en) | Refrigeration type medium wave infrared two-gear zoom optical system | |
| CN112162392B (en) | Short wave infrared two-gear zoom optical lens | |
| CN111221115B (en) | Large-zoom-ratio short-wave infrared continuous zoom lens | |
| CN113448071B (en) | Optical module | |
| CN114137699A (en) | Small high-resolution athermalized medium-wave infrared optical system | |
| CN108366185A (en) | A kind of variable focal length infrared imaging terminal | |
| CN210401822U (en) | Compact catadioptric optical system | |
| CN114089517A (en) | Long-contraction-ratio continuous zoom lens with three working modes | |
| CN110865452B (en) | Airborne medium wave refrigeration infrared continuous zooming optical system | |
| CN110850566B (en) | Ultrashort 20-time medium wave continuous zoom lens without diffraction surface | |
| CN118131453B (en) | Wide-angle large-aperture short-flange video lens | |
| CN114236796B (en) | Visible light-medium wave infrared afocal optical system | |
| CN115202031A (en) | 90-degree image-rotating eyepiece optical system |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |