CN112180571B - A common aperture infrared dual-band dual-field optical system - Google Patents
A common aperture infrared dual-band dual-field optical system Download PDFInfo
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- CN112180571B CN112180571B CN202011059374.2A CN202011059374A CN112180571B CN 112180571 B CN112180571 B CN 112180571B CN 202011059374 A CN202011059374 A CN 202011059374A CN 112180571 B CN112180571 B CN 112180571B
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- G02B13/00—Optical objectives specially designed for the purposes specified below
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- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
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Abstract
The invention provides a common-aperture infrared dual-waveband dual-field-of-view optical system, which solves the problems of complex structure and large volume of the whole imaging system caused by the adoption of a plurality of independent infrared waveband imaging systems in the conventional multi-waveband infrared detection. The system comprises a front fixed group, a zoom group, a rear fixed group and a projection lens group, wherein the projection lens group comprises a long-wave projection lens group and a medium-wave projection lens group which can be switched with each other; the front fixed group comprises a meniscus lens with positive focal power bent to the image side and a meniscus lens with negative focal power bent to the image side; the zoom group is a negative focal power biconcave third lens; the rear fixed group comprises a positive focal power double convex lens, a negative focal power meniscus lens bending to an object space, a positive focal power meniscus lens bending to an image space, and a negative focal power meniscus lens bending to the image space, the long wave projection lens group comprises 4 lenses, the medium wave projection lens group comprises 4 lenses, and the third lens can move back and forth along the optical axis direction to realize two-gear double-field-of-view zooming.
Description
Technical Field
The invention relates to an infrared optical system, in particular to a common-aperture infrared dual-waveband dual-field-of-view optical system.
Background
In a modern detection system, infrared search tracking equipment is widely applied, but due to different used regional climates, change of external environment temperature, camouflage of a target and the like, information acquired by a single-waveband detection system is insufficient, so that the target cannot be detected by the detection system or the detection accuracy is reduced, and the target cannot be detected and identified by the equipment under a complex background.
Therefore, multiband infrared detection comparison and image compounding are carried out on the target according to the radiation and reflection characteristics of the target and the background, and the target becomes a hot spot in the infrared optical field. By utilizing the spectrums of different wavelength ranges of the infrared wave bands, the disguised information of the target can be effectively removed, the detection and identification capability and the identification rate of the target are improved, and the false alarm rate of the system is reduced. However, in the prior art, in order to implement multiband infrared detection, a plurality of imaging systems with independent infrared bands are usually designed, and although the detection requirements can be met, the defects of complex structure and large volume of the whole system are inevitably brought.
Disclosure of Invention
The invention provides a common-aperture infrared dual-waveband dual-field-of-view optical system, aiming at solving the technical problems of complex structure and large volume of the whole imaging system caused by the adoption of a plurality of independent infrared waveband imaging systems in the existing multiband infrared detection.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a common-aperture infrared dual-waveband dual-field-of-view optical system is characterized in that: the system comprises a front fixed group, a zoom group, a rear fixed group and a projection lens group which are sequentially arranged from an object side to an image side, wherein the projection lens group comprises a long-wave projection lens group and a medium-wave projection lens group which can be switched with each other;
the front fixed group comprises a first lens and a second lens which are sequentially arranged along an optical axis, the first lens is a meniscus lens with positive focal power convex towards an object space, and the second lens is a meniscus lens with negative focal power convex towards the object space;
the zoom group is a third lens, and the third lens is a negative focal power biconcave lens;
the rear fixed group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged along an optical axis, wherein the fourth lens is a meniscus lens with positive focal power convex towards an image space, the fifth lens is a meniscus lens with negative focal power convex towards the image space, the sixth lens is a meniscus lens with positive focal power convex towards an object space, and the seventh lens is a meniscus lens with negative focal power convex towards the object space;
the long-wave projection lens group comprises an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens which are sequentially arranged along an optical axis, wherein the eighth lens is a negative focal power biconcave lens, the ninth lens is a positive focal power biconvex lens, the tenth lens is a meniscus lens with positive focal power convex towards an object space, the eleventh lens is a meniscus lens with negative focal power convex towards the object space, and the twelfth lens is a positive focal power biconvex lens;
the medium wave projection lens group comprises a thirteenth lens, a fourteenth lens, a fifteenth lens, a sixteenth lens and a seventeenth lens which are sequentially arranged along an optical axis, wherein the thirteenth lens is a meniscus lens with positive focal power convex towards an image space, the fourteenth lens is a meniscus lens with positive focal power convex towards an object space, the fifteenth lens is a negative focal power biconcave lens, the sixteenth lens is a meniscus lens with negative focal power convex towards the object space, and the seventeenth lens is a positive focal power biconvex lens;
the third lens can move back and forth along the direction of an optical axis to realize two-gear double-field zooming, and moves towards one side of an image space when changing towards the telephoto direction; in the change to the short focus, the third lens moves toward the object plane side.
Further, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the eleventh lens, the twelfth lens, the thirteenth lens, the fourteenth lens, the fifteenth lens, the sixteenth lens, and the seventeenth lens are made of chalcogenide glass, zinc sulfide, germanium, chalcogenide glass, zinc sulfide, germanium, zinc selenide, germanium, silicon, germanium, silicon, and silicon, respectively.
Further, the interval between the third lens and the fourth lens ranges from 2.56mm to 89.82 mm.
Further, a surface close to the object side is defined as a front surface, and a surface close to the image side is defined as a rear surface;
the thickness of the first lens is 24mm, the front surface of the first lens is a spherical surface, and the curvature radius is 217.24 mm; the rear surface is spherical, and the curvature radius is 800.17 mm;
the thickness of the second lens is 17.77mm, the front surface of the second lens is a spherical surface, and the curvature radius is 1744.17 mm; the posterior surface is spherical with a radius of curvature of 279.83 mm.
Further, the third lens has a thickness of 11.34mm, an aspherical front surface and a curvature radius of-1028.68 mm, and an aspherical surface coefficient a of-7.11 × 10-8，B＝3.14×10-11，C＝-3.10×10-15；
The rear surface is aspherical with a radius of curvature of 586.17mm and an aspherical coefficient A of-6.30X 10-8，B＝3.13×10-11，C＝-3.05×10-15。
Further, the thickness of the fourth lens is 12.95mm, the front surface of the fourth lens is a spherical surface, and the curvature radius is-7472.79 mm; the rear surface is a spherical surface, and the curvature radius is-130.80 mm;
the thickness of the fifth lens is 9mm, the front surface of the fifth lens is a spherical surface, and the curvature radius of the fifth lens is-120.62 mm; the rear surface is a spherical surface, and the curvature radius is-577.85 mm;
the thickness of the sixth lens is 10mm, the front surface of the sixth lens is a spherical surface, and the curvature radius of the sixth lens is 231.10 mm; the rear surface is spherical, and the curvature radius is 1156.55 mm;
the thickness of the seventh lens is 17mm, the front surface of the seventh lens is a spherical surface, and the curvature radius of the seventh lens is 38.91 mm; the rear surface is a spherical surface, and the curvature radius is 24.48 mm;
further, the thickness of the eighth lens is 4mm, the front surface of the eighth lens is a spherical surface, and the curvature radius of the eighth lens is-563.31 mm; the rear surface is spherical, and the curvature radius is 114.06 mm;
the thickness of the ninth lens is 5.35mm, the front surface of the ninth lens is a spherical surface, and the curvature radius of the ninth lens is 554.31 mm; the rear surface is a spherical surface, and the curvature radius is-125.81 mm;
the thickness of the tenth lens is 7.67mm, the front surface of the tenth lens is a spherical surface, and the curvature radius of the tenth lens is 25.62 mm; the rear surface is spherical, and the curvature radius is 58.94 mm;
the thickness of the eleventh lens is 6.01mm, the front surface of the eleventh lens is a spherical surface, and the curvature radius of the eleventh lens is 398.76 mm; the rear surface is spherical, and the curvature radius is 37.88 mm;
the thickness of the twelfth lens is 9mm, the front surface of the twelfth lens is a spherical surface, and the curvature radius of the twelfth lens is 120.25 mm; the rear surface is a spherical surface, and the curvature radius is-114.61 mm;
further, the thickness of the thirteenth lens is 15mm, the front surface of the thirteenth lens is a spherical surface, and the curvature radius is-66.36 mm; the rear surface is a spherical surface, and the curvature radius is-57.15 mm;
the thickness of the fourteenth lens is 3.84mm, the front surface of the fourteenth lens is a spherical surface, and the curvature radius of the fourteenth lens is 44.98 mm; the rear surface is spherical, and the curvature radius is 168.61 mm;
the thickness of the fifteenth lens is 4.05mm, the front surface of the fifteenth lens is a spherical surface, and the curvature radius of the fifteenth lens is-67.71 mm; the rear surface is spherical, and the curvature radius is 168.51 mm;
the thickness of the sixteenth lens is 2.87mm, the front surface of the sixteenth lens is a spherical surface, and the curvature radius is 31.66 mm; the rear surface is spherical, and the curvature radius is 23.68 mm;
the thickness of the seventeenth lens is 9.87mm, the front surface of the seventeenth lens is a spherical surface, and the curvature radius is 65.36 mm; the posterior surface is spherical with a radius of curvature of-74.56 mm.
Further, when the long-wave projection lens group is positioned on an emergent light path of the rear fixed group, the front fixed group, the third lens, the rear fixed group and the long-wave projection lens group form a long-wave infrared optical system;
when the medium wave projection lens group is positioned on an emergent light path of the rear fixed group, the front fixed group, the third lens, the rear fixed group and the medium wave projection lens group form a medium wave infrared optical system;
the parameters of the long-wave infrared optical system and the medium-wave infrared optical system are two grades of 185mm/370mm focal length, the relative aperture 1/2 is 2.97 degrees multiplied by 2.38 degrees/1.49 degrees multiplied by 1.19 degrees in field of view.
Compared with the prior art, the invention has the advantages that:
the dual-waveband double-field optical system comprises a front fixed group, a zoom group, a rear fixed group, a long-wave projection lens group and a medium-wave projection lens group, and the transformation of two wavebands of the system can be realized by switching the long-wave projection lens group or the medium-wave projection lens group in the whole group; when the long-wave projection lens group is cut into the emergent light path of the rear fixed group, the front fixed group, the zoom group, the rear fixed group and the long-wave projection lens group form a long-wave infrared optical system; when the medium wave projection lens group is cut into an emergent light path of the rear fixed group, the front fixed group, the zoom group, the rear fixed group and the medium wave projection lens group form a medium wave infrared optical system, and different wave bands can be selected to detect a target according to the radiation characteristic of the target; the zoom group can realize two-stage zoom of the focal length of the long-wave infrared/medium-wave infrared optical system by axially moving the zoom group, and the zoom group is a single lens, so that the structure is simple, the control requirement is low, and the high imaging quality of the system is easily ensured.
Drawings
FIG. 1 is a diagram of an optical path of a long-wave infrared short-focus 185mm optical system in a common-aperture infrared two-waveband dual-field-of-view optical system according to the present invention;
FIG. 2 is a diagram of the optical path of a long-wave infrared long-focus 370mm optical system in the common-aperture infrared two-waveband two-field optical system of the present invention;
FIG. 3 is a diagram of the optical path of a medium wave infrared short focus 185mm optical system in the common-aperture infrared two-waveband dual-field-of-view optical system of the present invention;
FIG. 4 is a diagram of the optical path of a medium wave infrared long focus 370mm optical system in the common-aperture infrared two-band dual-field optical system of the present invention;
FIG. 5 is a graph of MTF for a long-wave infrared short-focus 185mm optical system at a spatial frequency of 33 lp/mm;
FIG. 6 is a graph of MTF for a long-wavelength infrared tele 370mm optical system at a spatial frequency of 33 lp/mm;
FIG. 7 is a graph of MTF for a medium-wave infrared short-focus 185mm optical system with a spatial frequency of 33 lp/mm;
FIG. 8 is a graph of MTF for a medium-wavelength infrared 370mm long-focus optical system with a spatial frequency of 33 lp/mm;
FIG. 9 is a plot of spherical aberration, field curvature and distortion for a long wave infrared short focus 185mm optical system;
FIG. 10 is a plot of spherical aberration, field curvature and distortion for a long wave IR tele 370mm optical system;
FIG. 11 is a plot of spherical aberration, field curvature and distortion for a medium wave infrared short focus 185mm optical system;
FIG. 12 is a plot of spherical aberration, field curvature and distortion for a medium wave infrared tele 370mm optical system;
wherein the reference numbers are as follows:
01-front fixed group, 02-rear fixed group, 03-long wave projection lens group, 04-medium wave projection lens group;
1-first lens, 2-second lens, 3-third lens, 4-fourth lens, 5-fifth lens, 6-sixth lens, 7-seventh lens, 8-eighth lens, 9-ninth lens, 10-tenth lens, 11-eleventh lens, 12-twelfth lens, 13-thirteenth lens, 14-fourteenth lens, 15-fifteenth lens, 16-sixteenth lens, 17-seventeenth lens.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1 to 4, a common-aperture infrared dual-band dual-field optical system includes a front fixed group 01, a zoom group, a rear fixed group 02, and a projection lens group, which are sequentially arranged from an object side to an image side, wherein the projection lens group includes a long-wave projection lens group 03 and a medium-wave projection lens group 04, and the conversion of two bands of the system can be realized by switching the long-wave projection lens group 03 or the medium-wave projection lens group 04 in the whole group; when the long-wave projection lens group 03 is cut into an emergent light path of the rear fixed group 02, the front fixed group 01, the zoom group, the rear fixed group 02 and the long-wave projection lens group 03 which are coaxially arranged form a long-wave infrared optical system; when the medium wave projection lens group 04 is cut into the emergent light path of the rear fixed group 02, the front fixed group 01, the zoom group, the rear fixed group 02 and the medium wave projection lens group 04 which are coaxially arranged form a medium wave infrared optical system; the dual-waveband dual-field-of-view optical system can select different wavebands (long-wave infrared or medium-wave infrared) to detect the target according to different target radiation characteristics; the long-wave infrared optical system and the medium-wave infrared optical system can realize the two-gear zoom of 185mm/370mm focal length by axially moving the zoom group.
The front fixed group 01 consists of 2 lenses, namely a first lens 1 and a second lens 2 which are coaxially arranged along an optical axis in sequence, wherein the first lens 1 is a meniscus chalcogenide glass lens with positive focal power convex towards an object space, and the second lens 2 is a meniscus zinc sulfide lens with negative focal power convex towards the object space;
the zoom group consists of 1 lens, and is a third lens 3, and the third lens 3 is a negative focal power biconcave germanium lens;
the rear fixed group 02 is composed of 4 lenses, namely a fourth lens 4, a fifth lens 5, a sixth lens 6 and a seventh lens 7 which are coaxially arranged along an optical axis in sequence, wherein the fourth lens 4 is a meniscus lens with positive focal power convex towards an image space, the fifth lens 5 is a meniscus zinc sulfide lens with negative focal power convex towards the image space, the sixth lens 6 is a chalcogenide glass lens with positive focal power convex towards an object space, and the seventh lens 7 is a meniscus zinc sulfide lens with negative focal power convex towards the object space;
the long-wave projection lens group 03 consists of 5 lenses, namely an eighth lens 8, a ninth lens 9, a tenth lens 10, an eleventh lens 11 and a twelfth lens 12 which are coaxially arranged along an optical axis in sequence, wherein the eighth lens 8 is a negative focal power biconcave zinc sulfide lens, the ninth lens 9 is a positive focal power biconvex meniscus germanium lens, the tenth lens 10 is a positive focal power meniscus zinc selenide lens with a convex object side, the eleventh lens 11 is a negative focal power meniscus germanium lens with a convex object side, and the twelfth lens 12 is a positive focal power biconvex germanium lens;
the medium wave projection lens group 04 is composed of 5 lenses, which are a thirteenth lens 13, a fourteenth lens 14, a fifteenth lens 15, a sixteenth lens 16 and a seventeenth lens 17 coaxially arranged along an optical axis respectively, wherein the thirteenth lens 13 is a meniscus silicon lens with positive focal power convex towards an image space, the fourteenth lens 14 is a meniscus silicon lens with positive focal power convex towards an object space, the fifteenth lens 15 is a negative focal power biconcave germanium lens, the sixteenth lens 16 is a meniscus silicon lens with negative focal power convex towards the object space, and the seventeenth lens 17 is a positive focal power biconvex silicon lens;
the zoom group can move back and forth along the optical axis direction to realize two-gear double-field zooming, and the embodiment can realize two-gear zooming of 185mm/370mm focal lengths of the long-wave infrared optical system and the medium-wave infrared optical system by axially moving the zoom group; the distance between the zoom group (the third lens 3) and the fourth lens 4 is changed from 89.82mm to 2.56mm, and the distance is changed from 87.26 mm.
The parameters of each lens in the dual-band dual-field optical system of the embodiment are shown in table 1, unit: mm.
TABLE 1 lens specific parameters in optical systems
The dual-band dual-field optical system of the embodiment: the focal length of the long-wave infrared optical system is 185mm/370mm, the relative aperture is 1/2, and the field of view is 2.97 degrees multiplied by 2.38 degrees (the diagonal is 3.81 degrees)/1.49 degrees multiplied by 1.19 degrees (the diagonal is 1.90 degrees); the focal length of the medium wave infrared optical system is 185mm/370mm, the relative aperture is 1/2, the viewing field is 2.97 degrees multiplied by 2.38 degrees (the diagonal is 3.81 degrees)/1.49 degrees multiplied by 1.19 degrees (the diagonal is 1.90 degrees); the device is suitable for a refrigeration type long-wave infrared thermal imager with the resolution of 640 multiplied by 512 and the pixel size of 15 mu m multiplied by 15 mu m, the cold screen efficiency is 100%, the total length of the common-aperture infrared dual-waveband double-field-of-view optical system is 614mm, and the aperture is 190 mm.
The dual-band dual-field optical system of the embodiment is a secondary imaging optical system, and comprises 12 lenses including a front fixed group 01, a zoom group, a rear fixed group 02 and a long-wave projection lens group 03 (or a medium-wave projection lens group 04), wherein the front fixed group 01, the zoom group and the rear fixed group 02 form a primary imaging system, the long-wave infrared optical system and the medium-wave infrared optical system share the primary imaging system, the primary imaging system and the long-wave projection lens group 03 form a long-wave infrared optical system, and the primary imaging system and the medium-wave projection lens group 04 form the medium-wave infrared optical system. The primary imaging system images an infinite target on a primary image surface, and finally the long-wave projection lens group 03 or the medium-wave projection lens group 04 images the target on the target surface of the thermal imager, so that the optical system is matched with the cold screen of the detector through the projection lens group, and the cold screen efficiency is 100%.
FIGS. 5-8 are graphs of MTF of the long-wavelength infrared/mid-wavelength infrared optical system at 185mm short focus/370 mm long focus, respectively. The MTF curve of the optical transfer function can comprehensively describe the imaging quality of the system, and is the most important index for measuring the imaging quality of the system. It can be seen from the figure that, at the spatial frequency of 33lp/mm, the on-axis and off-axis transfer functions MTF of the optical system of the present embodiment are both close to the diffraction limit, and have high imaging quality, thereby completely meeting the requirement of target detection.
FIGS. 9 to 12 are graphs of spherical aberration, field curvature and distortion of the long-wavelength infrared/medium-wavelength infrared optical system at 185mm/370mm short focus, respectively. For an object point on one axis, there are only two aberrations, spherical aberration and axial chromatic aberration, which are usually plotted on a aberration graph with the ordinate representing the beam aperture and the abscissa representing the spherical aberration and the axial chromatic aberration. To show the imaging sharpness of off-axis object points, it is generally shown by an astigmatism curve. In the curve, t and s represent the tangential and sagittal field curves, respectively, and the difference between the positions of t and s is the astigmatism. As can be seen from the figure, the distortion of the optical system of the embodiment is less than 1%, the imaging quality of the system is good, and the requirement of searching and tracking the infrared target can be met.
The above description is only for the purpose of describing the preferred embodiments of the present invention and does not limit the technical solutions of the present invention, and any known modifications made by those skilled in the art based on the main technical concepts of the present invention fall within the technical scope of the present invention.
Claims (8)
1. The utility model provides a two visual field optical system of infrared dual waveband in common aperture which characterized in that: the device comprises a front fixed group (01), a zoom group, a rear fixed group (02) and a projection lens group which are sequentially arranged from an object space to an image space, wherein the projection lens group comprises a long-wave projection lens group (03) and a medium-wave projection lens group (04) which can be switched with each other;
the front fixed group (01) comprises a first lens (1) and a second lens (2) which are sequentially arranged along an optical axis, the first lens (1) is a meniscus lens with positive focal power convex towards an object space, and the second lens (2) is a meniscus lens with negative focal power convex towards the object space;
the zoom group is a third lens (3), and the third lens (3) is a negative focal power biconcave lens;
the rear fixed group (02) comprises a fourth lens (4), a fifth lens (5), a sixth lens (6) and a seventh lens (7) which are sequentially arranged along an optical axis, wherein the fourth lens (4) is a meniscus lens with positive focal power convex towards the image side, the fifth lens (5) is a meniscus lens with negative focal power convex towards the image side, the sixth lens (6) is a meniscus lens with positive focal power convex towards the object side, and the seventh lens (7) is a meniscus lens with negative focal power convex towards the object side;
the long-wave projection lens group (03) comprises an eighth lens (8), a ninth lens (9), a tenth lens (10), an eleventh lens (11) and a twelfth lens (12) which are sequentially arranged along an optical axis, wherein the eighth lens (8) is a negative focal power biconcave lens, the ninth lens (9) is a positive focal power biconvex lens, the tenth lens (10) is a meniscus lens with positive focal power convex towards an object space, the eleventh lens (11) is a meniscus lens with negative focal power convex towards the object space, and the twelfth lens (12) is a positive focal power biconvex lens;
the medium wave projection lens group (04) comprises a thirteenth lens (13), a fourteenth lens (14), a fifteenth lens (15), a sixteenth lens (16) and a seventeenth lens (17) which are sequentially arranged along an optical axis, wherein the thirteenth lens (13) is a meniscus lens with positive focal power convex towards an image space, the fourteenth lens (14) is a meniscus lens with positive focal power convex towards an object space, the fifteenth lens (15) is a biconcave lens with negative focal power, the sixteenth lens (16) is a meniscus lens with negative focal power convex towards the object space, and the seventeenth lens (17) is a biconvex lens with positive focal power;
the third lens (3) can move back and forth along the direction of an optical axis to realize two-gear double-field zooming, and when the third lens (3) changes towards the telephoto direction, the third lens (3) moves towards one side of an image space; when the focal length is changed to the short focus, the third lens (3) moves towards one side of the object plane;
the materials of the first lens (1), the second lens (2), the third lens (3), the fourth lens (4), the fifth lens (5), the sixth lens (6), the seventh lens (7), the eighth lens (8), the ninth lens (9), the tenth lens (10), the eleventh lens (11), the twelfth lens (12), the thirteenth lens (13), the fourteenth lens (14), the fifteenth lens (15), the sixteenth lens (16) and the seventeenth lens (17) are chalcogenide glass, zinc sulfide, germanium, chalcogenide glass, zinc sulfide, germanium, zinc selenide, germanium, silicon, germanium, silicon.
2. The common-aperture infrared dual-band dual-field optical system of claim 1, wherein: the interval between the third lens (3) and the fourth lens (4) ranges from 2.56mm to 89.82 mm.
3. The common-aperture infrared dual-band dual-field optical system according to claim 1 or 2, characterized in that: defining the surface close to the object side as a front surface and the surface close to the image side as a rear surface;
the thickness of the first lens (1) is 24mm, the front surface of the first lens is a spherical surface, and the curvature radius is 217.24 mm; the rear surface is spherical, and the curvature radius is 800.17 mm;
the thickness of the second lens (2) is 17.77mm, the front surface of the second lens is spherical, and the curvature radius is 1744.17 mm; the posterior surface is spherical with a radius of curvature of 279.83 mm.
4. The common-aperture infrared dual-band dual-field optical system of claim 3, wherein: the third lens (3) has a thickness of 11.34mm, an aspherical front surface and a curvature radius of-1028.68 mm, and an aspherical surface coefficient A of-7.11 × 10-8，B＝3.14×10-11，C＝-3.10×10-15；
The rear surface is aspherical with a radius of curvature of 586.17mm and an aspherical coefficient A of-6.30X 10-8，B＝3.13×10-11，C＝-3.05×10-15。
5. The common-aperture infrared dual-band dual-field optical system of claim 4, wherein:
the thickness of the fourth lens (4) is 12.95mm, the front surface of the fourth lens is a spherical surface, and the curvature radius is-7472.79 mm; the rear surface is a spherical surface, and the curvature radius is-130.80 mm;
the thickness of the fifth lens (5) is 9mm, the front surface of the fifth lens is a spherical surface, and the curvature radius is-120.62 mm; the rear surface is a spherical surface, and the curvature radius is-577.85 mm;
the thickness of the sixth lens (6) is 10mm, the front surface of the sixth lens is a spherical surface, and the curvature radius is 231.10 mm; the rear surface is spherical, and the curvature radius is 1156.55 mm;
the thickness of the seventh lens (7) is 17mm, the front surface of the seventh lens is a spherical surface, and the curvature radius of the seventh lens is 38.91 mm; the rear surface is spherical with a radius of curvature of 24.48 mm.
6. The common-aperture infrared dual-band dual-field optical system of claim 5, wherein:
the thickness of the eighth lens (8) is 4mm, the front surface of the eighth lens is a spherical surface, and the curvature radius of the eighth lens is-563.31 mm; the rear surface is spherical, and the curvature radius is 114.06 mm;
the thickness of the ninth lens (9) is 5.35mm, the front surface of the ninth lens is spherical, and the curvature radius is 554.31 mm; the rear surface is a spherical surface, and the curvature radius is-125.81 mm;
the thickness of the tenth lens (10) is 7.67mm, the front surface of the tenth lens is a spherical surface, and the curvature radius of the tenth lens is 25.62 mm; the rear surface is spherical, and the curvature radius is 58.94 mm;
the thickness of the eleventh lens (11) is 6.01mm, the front surface of the eleventh lens is a spherical surface, and the curvature radius is 398.76 mm; the rear surface is spherical, and the curvature radius is 37.88 mm;
the thickness of the twelfth lens (12) is 9mm, the front surface of the twelfth lens is spherical, and the curvature radius is 120.25 mm; the posterior surface is spherical with a radius of curvature of-114.61 mm.
7. The common-aperture infrared dual-band dual-field optical system of claim 6, wherein:
the thickness of the thirteenth lens (13) is 15mm, the front surface of the thirteenth lens is a spherical surface, and the curvature radius is-66.36 mm; the rear surface is a spherical surface, and the curvature radius is-57.15 mm;
the thickness of the fourteenth lens (14) is 3.84mm, the front surface of the fourteenth lens is spherical, and the curvature radius of the fourteenth lens is 44.98 mm; the rear surface is spherical, and the curvature radius is 168.61 mm;
the thickness of the fifteenth lens (15) is 4.05mm, the front surface of the fifteenth lens is a spherical surface, and the curvature radius is-67.71 mm; the rear surface is spherical, and the curvature radius is 168.51 mm;
the thickness of the sixteenth lens (16) is 2.87mm, the front surface of the sixteenth lens is a spherical surface, and the curvature radius is 31.66 mm; the rear surface is spherical, and the curvature radius is 23.68 mm;
the thickness of the seventeenth lens (17) is 9.87mm, the front surface of the seventeenth lens is a spherical surface, and the curvature radius is 65.36 mm; the posterior surface is spherical with a radius of curvature of-74.56 mm.
8. The common-aperture infrared dual-band dual-field optical system of claim 7, wherein:
when the long-wave projection lens group (03) is positioned on an emergent light path of the rear fixed group (02), the front fixed group (01), the third lens (3), the rear fixed group (02) and the long-wave projection lens group (03) form a long-wave infrared optical system;
when the medium wave projection lens group (04) is positioned on an emergent light path of the rear fixed group (02), the front fixed group (01), the third lens (3), the rear fixed group (02) and the medium wave projection lens group (04) form a medium wave infrared optical system;
the parameters of the long-wave infrared optical system and the medium-wave infrared optical system are two grades of 185mm/370mm focal length, the relative aperture 1/2 is 2.97 degrees multiplied by 2.38 degrees/1.49 degrees multiplied by 1.19 degrees in field of view.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11860345B2 (en) * | 2021-04-23 | 2024-01-02 | Bae Systems Information And Electronic Systems Integration Inc. | Midwave infrared discrete zoom lens |
| CN113376818A (en) * | 2021-04-28 | 2021-09-10 | 中国电子科技集团公司第十一研究所 | Dual-waveband dual-field-of-view optical system |
| CN113448067B (en) * | 2021-05-21 | 2022-05-20 | 中国科学院西安光学精密机械研究所 | Switching type zooming heat difference eliminating type long-wave infrared zoom lens |
| CN113448063B (en) * | 2021-05-21 | 2022-05-20 | 中国科学院西安光学精密机械研究所 | A medium wave infrared lens with large field of view and large relative aperture |
| CN113933976B (en) * | 2021-10-25 | 2023-07-25 | 季华实验室 | A long focal length dual-band infrared optical system |
Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9507671D0 (en) * | 1995-04-13 | 1995-11-08 | Barr & Stroud Ltd | Dual waveband optical system |
| EP0367197B1 (en) * | 1988-10-31 | 1995-11-29 | Hughes Aircraft Company | Dual band/dual FOV infrared telescope |
| US5493441A (en) * | 1994-01-13 | 1996-02-20 | Texas Instruments Incorporated | Infrared continuous zoom telescope using diffractive optics |
| US6075646A (en) * | 1995-01-09 | 2000-06-13 | Olympus Optical Co., Ltd. | Observation optical apparatus |
| JP2010276892A (en) * | 2009-05-29 | 2010-12-09 | Fujifilm Corp | Image reading lens and image reader |
| CN104035190A (en) * | 2014-06-05 | 2014-09-10 | 西安工业大学 | Integrated multi-waveband common-path synchronous continuous variable-focus optical system |
| CN104238099A (en) * | 2014-09-18 | 2014-12-24 | 西安工业大学 | Large-zoom-ratio infrared dual-band common-caliber common-zooming optical system |
| CN204360000U (en) * | 2014-12-30 | 2015-05-27 | 中国科学院西安光学精密机械研究所 | Refrigeration type medium wave infrared stepping zooming tracking lens |
| US9091840B1 (en) * | 2010-12-22 | 2015-07-28 | United States Of America As Represented By The Secretary Of The Army | Dual spectral-band optical lens imager |
| CN105301748A (en) * | 2015-12-04 | 2016-02-03 | 中国航空工业集团公司洛阳电光设备研究所 | Double-wave-band three-field of view infrared optical system |
| CN105372796A (en) * | 2015-12-07 | 2016-03-02 | 西安工业大学 | Refrigeration type common-caliber medium/long-wave infrared double-waveband double-view-field dual-shift zoom optical system |
| CN105676433A (en) * | 2016-03-16 | 2016-06-15 | 凯迈（洛阳）测控有限公司 | Double-group linkage infrared continuous zooming optical system |
| CN106950684A (en) * | 2017-04-13 | 2017-07-14 | 西安工业大学 | A kind of integrated infrared double-waveband 20X varifocal optical systems |
| CN108152937A (en) * | 2017-11-13 | 2018-06-12 | 长春理工大学 | In infrared/long wave Zooming-projection camera lens |
| CN108508582A (en) * | 2018-03-23 | 2018-09-07 | 中国科学院西安光学精密机械研究所 | Infrared double-spectrum common zoom lens |
| CN208013531U (en) * | 2018-03-23 | 2018-10-26 | 中国科学院西安光学精密机械研究所 | Common-caliber double-view-field double-color infrared imaging lens |
| CN109407273A (en) * | 2018-11-14 | 2019-03-01 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of visible light, medium-wave infrared and LONG WAVE INFRARED are total to path optical system |
| CN110398828A (en) * | 2019-07-10 | 2019-11-01 | 中国科学院上海技术物理研究所 | A Broad Spectrum Large Relative Aperture Medium and Long Wave Infrared Imaging Optical System |
| CN110658613A (en) * | 2019-09-29 | 2020-01-07 | 凯迈（洛阳）测控有限公司 | Miniaturized large-zoom-ratio medium-wave refrigeration infrared continuous zooming optical system |
| CN210072179U (en) * | 2019-05-17 | 2020-02-14 | 中国科学院上海技术物理研究所 | Infrared two-gear zoom area array scanning optical system |
| CN210090812U (en) * | 2019-06-27 | 2020-02-18 | 三河市蓝思泰克光电科技有限公司 | Folding type light path long wave infrared refrigeration double-view-field lens |
| CN111367042A (en) * | 2018-12-25 | 2020-07-03 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber long-focus infrared bicolor optical lens and imaging device |
| CN111580250A (en) * | 2020-05-28 | 2020-08-25 | 中国科学院西安光学精密机械研究所 | Common-aperture visible long-wave infrared bicolor optical system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8836794B2 (en) * | 2011-08-15 | 2014-09-16 | The United States Of America As Represented By The Secretary Of The Army | Dual field of view multi-band optics |
| JP6207139B2 (en) * | 2012-09-21 | 2017-10-04 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| US8824055B2 (en) * | 2012-11-16 | 2014-09-02 | Raytheon Company | Refractive optics with broad spectral coverage |
| TWI463173B (en) * | 2013-07-25 | 2014-12-01 | Young Optics Inc | Zoom lens |
| CN104297908B (en) * | 2013-11-28 | 2017-12-26 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of double-colored more visual field optical systems of medium wave/long wave |
| CN108345093A (en) * | 2018-03-23 | 2018-07-31 | 中国科学院西安光学精密机械研究所 | Common-caliber double-view-field double-color infrared imaging lens |
| US20200218055A1 (en) * | 2019-01-03 | 2020-07-09 | Viettel Group | Long-wave infrared optical system for observing devices using the principle of the Cassegrain telescope |
| CN211603697U (en) * | 2019-12-13 | 2020-09-29 | 中国科学院西安光学精密机械研究所 | A long-wave infrared cryogenic optical lens |
-
2020
- 2020-09-30 CN CN202011059374.2A patent/CN112180571B/en active Active
Patent Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0367197B1 (en) * | 1988-10-31 | 1995-11-29 | Hughes Aircraft Company | Dual band/dual FOV infrared telescope |
| US5493441A (en) * | 1994-01-13 | 1996-02-20 | Texas Instruments Incorporated | Infrared continuous zoom telescope using diffractive optics |
| US6075646A (en) * | 1995-01-09 | 2000-06-13 | Olympus Optical Co., Ltd. | Observation optical apparatus |
| GB9507671D0 (en) * | 1995-04-13 | 1995-11-08 | Barr & Stroud Ltd | Dual waveband optical system |
| JP2010276892A (en) * | 2009-05-29 | 2010-12-09 | Fujifilm Corp | Image reading lens and image reader |
| US9091840B1 (en) * | 2010-12-22 | 2015-07-28 | United States Of America As Represented By The Secretary Of The Army | Dual spectral-band optical lens imager |
| CN104035190A (en) * | 2014-06-05 | 2014-09-10 | 西安工业大学 | Integrated multi-waveband common-path synchronous continuous variable-focus optical system |
| CN104238099A (en) * | 2014-09-18 | 2014-12-24 | 西安工业大学 | Large-zoom-ratio infrared dual-band common-caliber common-zooming optical system |
| CN204360000U (en) * | 2014-12-30 | 2015-05-27 | 中国科学院西安光学精密机械研究所 | Refrigeration type medium wave infrared stepping zooming tracking lens |
| CN105301748A (en) * | 2015-12-04 | 2016-02-03 | 中国航空工业集团公司洛阳电光设备研究所 | Double-wave-band three-field of view infrared optical system |
| CN105372796A (en) * | 2015-12-07 | 2016-03-02 | 西安工业大学 | Refrigeration type common-caliber medium/long-wave infrared double-waveband double-view-field dual-shift zoom optical system |
| CN105676433A (en) * | 2016-03-16 | 2016-06-15 | 凯迈（洛阳）测控有限公司 | Double-group linkage infrared continuous zooming optical system |
| CN106950684A (en) * | 2017-04-13 | 2017-07-14 | 西安工业大学 | A kind of integrated infrared double-waveband 20X varifocal optical systems |
| CN108152937A (en) * | 2017-11-13 | 2018-06-12 | 长春理工大学 | In infrared/long wave Zooming-projection camera lens |
| CN108508582A (en) * | 2018-03-23 | 2018-09-07 | 中国科学院西安光学精密机械研究所 | Infrared double-spectrum common zoom lens |
| CN208013531U (en) * | 2018-03-23 | 2018-10-26 | 中国科学院西安光学精密机械研究所 | Common-caliber double-view-field double-color infrared imaging lens |
| CN109407273A (en) * | 2018-11-14 | 2019-03-01 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of visible light, medium-wave infrared and LONG WAVE INFRARED are total to path optical system |
| CN111367042A (en) * | 2018-12-25 | 2020-07-03 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber long-focus infrared bicolor optical lens and imaging device |
| CN210072179U (en) * | 2019-05-17 | 2020-02-14 | 中国科学院上海技术物理研究所 | Infrared two-gear zoom area array scanning optical system |
| CN210090812U (en) * | 2019-06-27 | 2020-02-18 | 三河市蓝思泰克光电科技有限公司 | Folding type light path long wave infrared refrigeration double-view-field lens |
| CN110398828A (en) * | 2019-07-10 | 2019-11-01 | 中国科学院上海技术物理研究所 | A Broad Spectrum Large Relative Aperture Medium and Long Wave Infrared Imaging Optical System |
| CN110658613A (en) * | 2019-09-29 | 2020-01-07 | 凯迈（洛阳）测控有限公司 | Miniaturized large-zoom-ratio medium-wave refrigeration infrared continuous zooming optical system |
| CN111580250A (en) * | 2020-05-28 | 2020-08-25 | 中国科学院西安光学精密机械研究所 | Common-aperture visible long-wave infrared bicolor optical system |
Non-Patent Citations (5)
| Title |
|---|
| 《Design of a mid-wavelength infrared dual field of view zoom system》;jing duan 等;《PROCEEDINGS OF SPIE》;20161019;1015416-1- 1015416-8 * |
| 《Infrared Dual-field-of-view Optical System Design with Electro-Optic/Laser Common-aperture Optics》;Dohwan Jeong 等;《Current Optics and Photonics》;20180630;241-249 * |
| 《外视场拼接的单镜头大视场中波红外成像系统的实现》;单秋莎 等;《应用光学》;20200331;0314002–1- 0314002–6 * |
| 《红外双波段模拟器投影系统》;王玥;《万方学位论文数据库》;20131231;1-59 * |
| 《红外相机共孔径双波段成像光学系统》;汤天瑾;《应用光学》;20150731;513-518 * |
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