CN108107554B - Distributed optical wedge scanning medium wave infrared athermal imaging lens - Google Patents
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- 238000003384 imaging method Methods 0.000 title claims abstract description 143
- 230000003287 optical effect Effects 0.000 title claims abstract description 141
- 239000000758 substrate Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 30
- 230000008030 elimination Effects 0.000 claims description 14
- 238000003379 elimination reaction Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000004075 alteration Effects 0.000 claims description 4
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 claims description 3
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
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Abstract
The invention discloses a distributed optical wedge scanning medium wave infrared athermal imaging lens, wherein an optical system comprises an optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the optical path comprises a first optical wedge of an optical wedge group, a second optical wedge of the optical wedge group, a scanning first reflector, a scanning second reflector, a first lens of an imaging group, a second lens of the imaging group, a third lens of the imaging group, a fourth lens of the imaging group, a fifth lens of the imaging group and a sixth lens of the imaging group from front to back; the front surface and the rear surface of the optical wedge group 1 are both planes, and the rear surface is an inclined plane; the front surface and the rear surface of the optical wedge group 2 are both planes, and the front surface is an inclined surface; the front surface of the 1 st lens of the imaging group is a diffraction surface with an aspheric surface as a substrate, and the rear surface is a plane; the front and back surfaces of the No. 2 lens of the imaging group are spherical surfaces; the front surface of the No. 3 lens of the imaging group is an aspheric surface, and the rear surface of the No. 3 lens of the imaging group is a spherical surface; the front surface of the 4 th lens of the imaging group is a spherical surface, and the rear surface of the imaging group is an aspheric surface; the front surface and the rear surface of the No. 5 lens of the imaging group are spherical surfaces; the rear surface of the imaging group 6 th lens is a plane.
Description
Technical Field
The invention belongs to the technical field of optical system design, and relates to a distributed optical wedge scanning medium wave infrared athermal imaging lens.
Background
The imaging performance of the infrared optical system is sensitive to the working temperature, when the infrared optical system works in a wide temperature range, the image plane of the optical system can drift along with the temperature change, and the influence of the temperature on the infrared optical system must be eliminated by adopting an athermalization technology. The working waveband of the optical system is 3-5 mu m, the usable materials in the waveband range are less, and the optical system is difficult to achromatize.
At present, no patent published at home and abroad exists about the distributed optical wedge scanning, medium wave infrared and athermal imaging lens.
Disclosure of Invention
The invention aims to provide a distributed optical wedge scanning medium-wave infrared athermal imaging lens, which is used for solving the problems in the prior art.
The invention discloses a distributed optical wedge scanning medium wave infrared athermal imaging lens, wherein an optical system comprises an optical path, a light path and a light path, wherein the optical path comprises an optical wedge group 1, an optical wedge group 2, a scanning 1 st reflecting mirror, a scanning 2 nd reflecting mirror, an imaging group 1 st lens, an imaging group 2 nd lens, an imaging group 3 rd lens, an imaging group 4 th lens, an imaging group 5 th lens and an imaging group 6 th lens from front to back; the front surface and the rear surface of the optical wedge group 1 are both planes, and the rear surface is an inclined plane; the front surface and the rear surface of the optical wedge group 2 are both planes, and the front surface is an inclined surface; the front surface of the 1 st lens of the imaging group is a diffraction surface with an aspheric surface as a substrate, and the rear surface is a plane; the front and back surfaces of the No. 2 lens of the imaging group are spherical surfaces; the front surface of the No. 3 lens of the imaging group is an aspheric surface, and the rear surface of the No. 3 lens of the imaging group is a spherical surface; the front surface of the 4 th lens of the imaging group is a spherical surface, and the rear surface of the imaging group is an aspheric surface; the front surface and the rear surface of the No. 5 lens of the imaging group are spherical surfaces; the rear surface of the imaging group 6 th lens is a plane.
According to one embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the distance change range of the No. 1 optical wedge of an optical wedge group and the No. 2 optical wedge of the optical wedge group is 6 mm-7 mm; the distance change range of the No. 2 optical wedge of the optical wedge group and the No. 1 scanning reflector is 28-29 mm; the distance change range of the short scanning No. 1 reflecting mirror and the scanning No. 2 reflecting mirror is 28 mm-29 mm; the distance change range between the short-scanning 2 nd reflecting mirror and the imaging group 1 st lens is 30-31 mm; the distance variation range of the 1 st lens of the imaging group and the 2 nd lens of the imaging group is 19.5 mm-20.5 mm; the distance variation range of the imaging group 2 nd lens and the imaging group 3 rd lens is 16.3 mm-17.3 mm; the distance variation range of the No. 3 lens of the imaging group and the No. 4 lens of the imaging group is 1.95 mm-2.05 mm; the distance variation range of the imaging group 4 th lens and the imaging group 5 th lens is 0.8 mm-0.9 mm; the distance between the imaging group 5 th lens and the imaging group 6 th lens is in a range of 0.9 mm-1 mm.
According to an embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the optical wedge 1 of the optical wedge group is made of Ge, the front surface and the rear surface are both planes, the rear surface is an inclined plane, the wedge angle ranges from 2.082 degrees to 2.098 degrees, the clear aperture ranges from 80mm to 44.5mm, and the thickness ranges from 2.4mm to 2.6mm.
According to an embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the material of the 2 nd optical wedge of the optical wedge group is Si, the front surface and the rear surface are both planes, the front surface is an inclined surface, the wedge angle range is-6.5 degrees to-6.4 degrees, the clear aperture is 76mm 43.5mm, and the thickness range is 6.9mm to 7.1 mm.
According to one embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the optical material of a scanning No. 1 reflector is K4, and the aperture range of the light transmission is phi 41.9 mm-phi 42 mm; the optical material of the scanning No. 2 reflecting mirror is K4, and the aperture of the light passing aperture ranges from 57mm to 42 mm.
According to an embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the optical material of the 1 st lens in the imaging group is ZnSe, the front surface is a diffraction surface taking an aspheric surface as a base, the aspheric surface coefficient is A-1.9024 e-007, B-3.02572 e-010, C-4.03008 e-013, D-1.81656 e-016, the diffraction surface coefficient is C1-9.36235 e-005, C2-9.5832 e-008, C3-3.5913 e-010, C4-3.29417 e-013, the radius range of the front surface is 89.52 mm-90.52 mm, the rear surface is a plane, the clear aperture ranges from 43mm phi to phi 44mm and from phi 43mm to phi 44mm in sequence, and the thickness range is 6 mm-7 mm.
According to an embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the optical material of the 2 nd lens of the imaging group is Si, the radius range of the front surface is minus 36.75mm to minus 35.75mm, the radius range of the rear surface is minus 27.3mm to minus 26.3mm, the aperture range of the light transmission is 23mm to 24mm and 25mm to 26mm in sequence, and the thickness range is 5mm to 6mm.
According to an embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the optical material of the No. 3 lens of the imaging group is Ge, the front surface is an aspheric surface, the aspheric surface coefficient is-8.09678 e-005, the aspheric surface coefficient is-5.60815 e-008, the aspheric surface coefficient is-1.0234 e-008, the aspheric surface coefficient is D2.31951 e-010, the radius range of the front surface is-11.05 mm to-10.05 mm, the radius range of the back surface is-16.82 mm to-15.82 mm, the light-transmitting aperture range is phi 11mm to phi 12mm and phi 15mm to phi 26mm in sequence, and the thickness range is 4.9mm to 5.9 mm.
According to an embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the optical material of the 4 th lens in the imaging group is Ge, the rear surface is an aspheric surface, the aspheric surface coefficient is-1.71187 e-006, the aspheric surface coefficient is 2.821832e-008, the aspheric surface coefficient is-5.38832 e-011, the aspheric surface is 3.00547e-013, the radius range of the front surface is-26.35 mm to-25.35 mm, the radius range of the rear surface is-96.93 mm to-95.93 mm, the light-transmitting aperture range is phi 15mm to phi 16mm and phi 18mm to phi 19mm in sequence, and the thickness range is 5mm to 6mm.
According to one embodiment of the distributed optical wedge scanning medium wave infrared athermal imaging lens, the optical material of the 5 th lens of the imaging group is Si, the radius range of the front surface is-95 mm to-94 mm, the radius range of the rear surface is-24 mm to-23 mm, the light-transmitting aperture ranges are phi 19mm to phi 20mm and phi 20.5mm to phi 21.5mm in sequence, and the thickness range is 4.8mm to 5.8 mm; the optical material of the 6 th lens of the imaging group is IG4, the back surface is a plane, the radius range of the front surface is-51.86 mm-50.86 mm, the light-transmitting aperture ranges of the front surface and the back surface are phi 19.5 mm-phi 20.5mm and phi 18.5 mm-phi 19.5mm in sequence, and the thickness range is 3.4 mm-4.4 mm.
The invention discloses a distributed optical wedge scanning, medium wave infrared and athermal imaging lens. The lens consists of an optical wedge array, a scanning reflector group and an imaging group, wherein the optical wedge array consists of 4 optical wedge groups (the attached figure is an imaging lens figure of one group of optical wedges), the scanning reflector group is used for receiving infrared radiation and reflection of 4 scenes in a time-sharing manner corresponding to the scenes with 4 different angles in an object space, and the imaging group converges energy on a photosensitive surface of an infrared detector. The lens wave band is 3-5 μm. The working temperature is-25 ℃ to +65 ℃, the design of heat difference elimination is realized in the working temperature range of the optical system, and the system performance meets the requirements.
Drawings
FIG. 1 is a schematic diagram of a distributed optical wedge scanning medium wave infrared thermal difference elimination imaging lens;
FIG. 2 is a diagram showing an optical transfer function value of a distributed optical wedge scanning medium-wave infrared athermal imaging lens at +20 ℃;
FIG. 3 is a diagram showing an optical transfer function value of a distributed optical wedge scanning medium wave infrared thermal difference elimination imaging lens at-25 ℃;
fig. 4 is a graph of an optical transfer function value of a distributed optical wedge scanning medium-wave infrared thermal difference elimination imaging lens at 65 ℃.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Fig. 1 is a schematic diagram of a distributed optical wedge scanning medium wave infrared thermal aberration elimination imaging lens according to the present invention, and as shown in fig. 1, an optical system is composed of an optical wedge group 1, an optical wedge group 2, a scanning 1 st mirror 3, a scanning 2 nd mirror 4, an imaging group 1 st lens 5, an imaging group 2 nd lens 6, an imaging group 3 rd lens 7, an imaging group 4 th lens 8, an imaging group 5 th lens 9, and an imaging group 6 th lens 10.
The material of the optical wedge 1 of the optical wedge group 1 is Ge, the front surface and the rear surface are both planes, the rear surface is an inclined plane, the wedge angle range is 2.082-2.098 degrees, the clear aperture is 80mm 44.5mm, and the thickness range is 2.4 mm-2.6 mm; the material of the optical wedge 2 of the optical wedge group 2 is Si, the front surface and the rear surface are both planes, the front surface is an inclined plane, the wedge angle range is-6.5 degrees to-6.4 degrees, the clear aperture is 76mm x 43.5mm, and the thickness range is 6.9mm to 7.1 mm; the optical material of the scanning 1 st reflecting mirror 3 is K4, and the aperture range of the light transmission is phi 41.9 mm-phi 42 mm; the optical material of the scanning No. 2 reflecting mirror 4 is K4, and the aperture range of the light transmission is 57mm x 42 mm; the optical material of the No. 1 lens 5 of the imaging group is ZnSe, the front surface is a diffraction surface taking an aspheric surface as a base, the aspheric surface coefficient is-1.9024 e-007, B is-3.02572 e-010, C is 4.03008e-013, D is-1.81656 e-016, the diffraction surface coefficient is C1 is-9.36235 e-005, C2 is 9.5832e-008, C3 is-3.5913 e-010, C4 is 3.29417e-013, the radius range of the front surface is 89.52 mm-90.52 mm, the rear surface is a plane, the light-passing aperture ranges of the front surface and the rear surface are 43 mm-44 mm and 43 mm-44 mm in sequence, and the thickness range is 6 mm-7 mm; the optical material of the No. 2 lens 6 of the imaging group is Si, the radius range of the front surface is minus 36.75mm to minus 35.75mm, the radius range of the rear surface is minus 27.3mm to minus 26.3mm, the light-transmitting aperture ranges are 23mm to 24mm and 25mm to 26mm in sequence, and the thickness range is 5mm to 6 mm; the optical material of the No. 3 lens 7 of the imaging group is Ge, the front surface is aspheric, the aspheric coefficient is-8.09678 e-005, B is-5.60815 e-008, C is-1.0234 e-008, D is 2.31951e-010, the radius range of the front surface is-11.05 mm to-10.05 mm, the radius range of the rear surface is-16.82 mm to-15.82 mm, the light-transmitting caliber ranges from phi 11mm to phi 12mm and from phi 15mm to phi 26mm in sequence, and the thickness range is 4.9mm to 5.9 mm; the optical material of the imaging group 4 th lens 8 is Ge, the rear surface is aspheric, the aspheric coefficient is-1.71187 e-006, B is 2.821832e-008, C is-5.38832 e-011, D is 3.00547e-013, the radius range of the front surface is-26.35 mm to-25.35 mm, the radius range of the rear surface is-96.93 mm to-95.93 mm, the light-transmitting caliber ranges from phi 15mm to phi 16mm and from phi 18mm to phi 19mm in sequence, and the thickness range is 5mm to 6 mm; the optical material of the imaging group 5 th lens 9 is Si, the radius range of the front surface is-95 mm to-94 mm, the radius range of the rear surface is-24 mm to-23 mm, the light-transmitting aperture ranges from phi 19mm to phi 20mm and from phi 20.5mm to phi 21.5mm in sequence, and the thickness range is 4.8mm to 5.8 mm; the optical material of the imaging group 6 th lens 10 is IG4, the back surface is a plane, the radius range of the front surface is-51.86 mm-50.86 mm, the light-transmitting aperture ranges of the front surface and the back surface are phi 19.5 mm-phi 20.5mm and phi 18.5 mm-phi 19.5mm in sequence, and the thickness range is 3.4 mm-4.4 mm.
The distance change range of the 1 st optical wedge 1 of the optical wedge group and the 2 nd optical wedge 2 of the optical wedge group is 6 mm-7 mm;
the distance change range of the 2 nd optical wedge 2 of the optical wedge group and the 1 st reflecting mirror 3 is 28 mm-29 mm;
the distance change range of the short scanning 1 st reflecting mirror 3 and the scanning 2 nd reflecting mirror 4 is 28 mm-29 mm;
the distance change range between the short-scanning 2 nd reflecting mirror 4 and the imaging group 1 st lens 5 is 30-31 mm;
the distance between the 1 st lens 5 of the imaging group and the 2 nd lens 6 of the imaging group is in the range of 19.5 mm-20.5 mm;
the distance between the imaging group 2 nd lens 6 and the imaging group 3 rd lens 7 ranges from 16.3mm to 17.3 mm;
the distance between the imaging group No. 3 lens 7 and the imaging group No. 4 lens 8 ranges from 1.95mm to 2.05 mm;
the distance between the imaging group 4 th lens 8 and the imaging group 5 th lens 9 is in the range of 0.8 mm-0.9 mm;
the distance between the imaging group 5 th lens 9 and the imaging group 6 th lens 10 is in the range of 0.9 mm-1 mm.
FIGS. 2-4 are graphs of optical transfer function values of the preferred embodiment of the optical system at +20 deg.C, -25 deg.C and +65 deg.C, respectively, using Code V optical design software, with design inputs of wavelengths 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm and F number 1.97. The abscissa of the graph represents the spatial frequency and the ordinate represents the optical transfer function value.
Table 1 shows the imaging quality of the optical lens at different temperatures, and it can be seen that the imaging quality of the optical lens from the central field to the peripheral field is excellent in the temperature range of-30 ℃ to +70 ℃, i.e. the whole image is very clear.
Table 1 distributed optical wedge scanning medium wave infrared thermal difference elimination imaging lens MTF @32lp/mm
The invention aims to provide a distributed optical wedge scanning, medium wave infrared and athermal imaging lens, wherein the wave band of the lens is 3-5 mu m. The working temperature is-25 ℃ to +65 ℃, the optical system realizes passive athermalization in the working temperature range, and the system performance meets the requirements. Operating band/wavelength: 3-5 μm;
the field angle: 15.3 ° × 12.24 °;
focal length: f is 35.7 mm;
number of lenses F: 1.97;
working temperature range: -25 ℃ to +65 ℃;
the invention discloses a distributed optical wedge scanning, medium wave infrared and athermal imaging lens. The lens consists of an optical wedge array, a scanning reflector group and an imaging group, wherein the optical wedge array consists of 4 optical wedge groups (the attached figure is an imaging lens figure of one group of optical wedges), the scanning reflector group is used for receiving infrared radiation and reflection of 4 scenes in a time-sharing manner corresponding to the scenes with 4 different angles in an object space, and the imaging group converges energy on a photosensitive surface of an infrared detector. The lens wave band is 3-5 μm. The working temperature is-25 ℃ to +65 ℃, the design of heat difference elimination is realized in the working temperature range of the optical system, and the system performance meets the requirements.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A distributed optical wedge scanning medium wave infrared athermal imaging lens is characterized in that an optical system comprises an optical wedge group 1 optical wedge, an optical wedge group 2 optical wedge, a scanning 1 st reflecting mirror, a scanning 2 nd reflecting mirror, an imaging group 1 st lens, an imaging group 2 nd lens, an imaging group 3 rd lens, an imaging group 4 th lens, an imaging group 5 th lens and an imaging group 6 th lens from front to back;
the front surface and the rear surface of the optical wedge group 1 are both planes, and the rear surface is an inclined plane; the front surface and the rear surface of the optical wedge group 2 are both planes, and the front surface is an inclined surface; the front surface of the 1 st lens of the imaging group is a diffraction surface with an aspheric surface as a substrate, and the rear surface is a plane; the front and back surfaces of the No. 2 lens of the imaging group are spherical surfaces; the front surface of the No. 3 lens of the imaging group is an aspheric surface, and the rear surface of the No. 3 lens of the imaging group is a spherical surface; the front surface of the 4 th lens of the imaging group is a spherical surface, and the rear surface of the imaging group is an aspheric surface; the front surface and the rear surface of the No. 5 lens of the imaging group are spherical surfaces; the rear surface of the imaging group 6 th lens is a plane.
2. The distributed optical wedge scanning medium wave infrared thermal aberration elimination imaging lens according to claim 1, wherein the distance variation range of the 1 st optical wedge of the optical wedge group and the 2 nd optical wedge of the optical wedge group is 6mm to 7 mm; the distance change range of the No. 2 optical wedge of the optical wedge group and the No. 1 scanning reflector is 28-29 mm; the distance change range between the scanning No. 1 reflecting mirror and the scanning No. 2 reflecting mirror is 28 mm-29 mm; the distance change range between the 2 nd reflecting mirror and the 1 st lens of the imaging group is 30-31 mm; the distance variation range of the 1 st lens of the imaging group and the 2 nd lens of the imaging group is 19.5 mm-20.5 mm; the distance variation range of the imaging group 2 nd lens and the imaging group 3 rd lens is 16.3 mm-17.3 mm; the distance variation range of the No. 3 lens of the imaging group and the No. 4 lens of the imaging group is 1.95 mm-2.05 mm; the distance variation range of the imaging group 4 th lens and the imaging group 5 th lens is 0.8 mm-0.9 mm; the distance between the imaging group 5 th lens and the imaging group 6 th lens is in a range of 0.9 mm-1 mm.
3. The distributed optical wedge scanning medium wave infrared thermal aberration elimination imaging lens according to claim 1, wherein the material of the optical wedge group 1 is Ge, the front surface and the rear surface are both flat surfaces, the rear surface is an inclined surface, the wedge angle ranges from 2.082 degrees to 2.098 degrees, the clear aperture ranges from 80mm to 44.5mm, and the thickness ranges from 2.4mm to 2.6mm.
4. The distributed optical wedge scanning medium wave infrared thermal aberration elimination imaging lens according to claim 1, wherein the material of the 2 nd optical wedge of the optical wedge group is Si, the front surface and the rear surface are both flat surfaces, the front surface is an inclined surface, the wedge angle ranges from-6.5 degrees to-6.4 degrees, the aperture of the light transmission is 76mm to 43.5mm, and the thickness ranges from 6.9mm to 7.1 mm.
5. The distributed optical wedge scanning medium wave infrared thermal difference elimination imaging lens of claim 1, wherein the optical material of the scanning No. 1 reflecting mirror is K4, and the aperture range of the light transmission is phi 41.9 mm-phi 42 mm; the optical material of the scanning No. 2 reflecting mirror is K4, and the aperture of the light passing aperture ranges from 57mm to 42 mm.
6. The distributed optical wedge scanning medium wave infrared athermal imaging lens of claim 1, wherein the optical material of the 1 st lens of the imaging group is ZnSe, the aspheric coefficient is A-1.9024 e-007, B-3.02572 e-010, C-4.03008 e-013, D-1.81656 e-016, the diffraction surface coefficient is C1-9.36235 e-005, C2-9.5832 e-008, C3-3.5913 e-010, C4-3.29417 e-013, the radius range of the front surface is 89.52 mm-90.52 mm, the rear surface is a plane, the clear aperture ranges of the front and rear surfaces are phi 43 mm-phi 44mm and phi 43 mm-phi 44mm in sequence, and the thickness range is 6 mm-7 mm.
7. The distributed optical wedge scanning medium wave infrared thermal difference elimination imaging lens according to claim 1, wherein the optical material of the 2 nd lens of the imaging group is Si, the radius range of the front surface is-36.75 mm to-35.75 mm, the radius range of the rear surface is-27.3 mm to-26.3 mm, the light-passing aperture ranges of the front surface and the rear surface are 23mm to 24mm and 25mm to 26mm in sequence, and the thickness range is 5mm to 6mm.
8. The distributed optical wedge scanning medium wave infrared thermal difference elimination imaging lens of claim 1, wherein the optical material of the No. 3 lens of the imaging group is Ge, the front surface is aspheric, the aspheric coefficient is-8.09678 e-005, B is-5.60815 e-008, C is-1.0234 e-008, D is 2.31951e-010, the radius range of the front surface is-11.05 mm to-10.05 mm, the radius range of the back surface is-16.82 mm to-15.82 mm, the light-passing calibers of the front surface and the back surface are sequentially 11mm to 12mm and 15mm to 26mm, and the thickness range is 4.9mm to 5.9 mm.
9. The distributed optical wedge scanning medium wave infrared athermal imaging lens of claim 1, wherein the optical material of the 4 th lens of the imaging group is Ge, the rear surface is aspheric, the aspheric coefficient is-1.71187 e-006, B is 2.821832e-008, C is-5.38832 e-011, D is 3.00547e-013, the radius range of the front surface is-26.35 mm to-25.35 mm, the radius range of the rear surface is-96.93 mm to-95.93 mm, the aperture range of the clear light is phi 15mm to phi 16mm and phi 18mm to phi 19mm in sequence, and the thickness range is 5mm to 6mm.
10. The distributed optical wedge scanning medium wave infrared thermal difference elimination imaging lens according to claim 1, wherein the optical material of the 5 th lens of the imaging group is Si, the radius range of the front surface is between-95 mm and-94 mm, the radius range of the rear surface is between-24 mm and-23 mm, the aperture range of the light transmission is between phi 19mm and phi 20mm and phi 20.5mm and phi 21.5mm in sequence, and the thickness range is between 4.8mm and 5.8 mm; the optical material of the 6 th lens of the imaging group is IG4, the back surface is a plane, the radius range of the front surface is-51.86 mm-50.86 mm, the light-transmitting aperture ranges of the front surface and the back surface are phi 19.5 mm-phi 20.5mm and phi 18.5 mm-phi 19.5mm in sequence, and the thickness range is 3.4 mm-4.4 mm.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008216131A (en) * | 2007-03-06 | 2008-09-18 | Mitsubishi Electric Corp | Infrared imaging/laser range finder |
| CN101482647A (en) * | 2009-02-20 | 2009-07-15 | 山东神戎电子股份有限公司 | Large-zoom ratio infrared continuous zoom lens of non-refrigeration thermal imaging instrument |
| CN103197405A (en) * | 2013-04-10 | 2013-07-10 | 苏州大学 | Near-infrared band athermalization optical lens |
| CN205263387U (en) * | 2015-12-14 | 2016-05-25 | 福建福光股份有限公司 | Infrared continuous zooming optical system of compact medium wave and camera lens thereof |
| CN205958828U (en) * | 2016-08-31 | 2017-02-15 | 昆明北方红外技术股份有限公司 | Medium wave refrigeration disappears and heats up poor infrared optical lens |
-
2017
- 2017-12-27 CN CN201711449232.5A patent/CN108107554B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008216131A (en) * | 2007-03-06 | 2008-09-18 | Mitsubishi Electric Corp | Infrared imaging/laser range finder |
| CN101482647A (en) * | 2009-02-20 | 2009-07-15 | 山东神戎电子股份有限公司 | Large-zoom ratio infrared continuous zoom lens of non-refrigeration thermal imaging instrument |
| CN103197405A (en) * | 2013-04-10 | 2013-07-10 | 苏州大学 | Near-infrared band athermalization optical lens |
| CN205263387U (en) * | 2015-12-14 | 2016-05-25 | 福建福光股份有限公司 | Infrared continuous zooming optical system of compact medium wave and camera lens thereof |
| CN205958828U (en) * | 2016-08-31 | 2017-02-15 | 昆明北方红外技术股份有限公司 | Medium wave refrigeration disappears and heats up poor infrared optical lens |
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|---|---|
| CN108107554A (en) | 2018-06-01 |
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Application publication date: 20180601 Assignee: Aerospace Photoelectric Technology Development (Tianjin) Co.,Ltd. Assignor: TIANJIN JINHANG INSTITUTE OF TECHNOLOGY PHYSICS Contract record no.: X2021990000717 Denomination of invention: A distributed wedge scanning medium wave infrared thermal difference imaging lens Granted publication date: 20201002 License type: Exclusive License Record date: 20211122 |