CN111751914B - Common-caliber infrared free-form surface prism optical system with double wave bands and double view fields - Google Patents
Common-caliber infrared free-form surface prism optical system with double wave bands and double view fields Download PDFInfo
- Publication number
- CN111751914B CN111751914B CN202010593406.0A CN202010593406A CN111751914B CN 111751914 B CN111751914 B CN 111751914B CN 202010593406 A CN202010593406 A CN 202010593406A CN 111751914 B CN111751914 B CN 111751914B
- Authority
- CN
- China
- Prior art keywords
- free
- form surface
- optical system
- infrared
- prism
- 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
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
- G02B17/086—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors wherein the system is made of a single block of optical material, e.g. solid catadioptric systems
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/02—Viewfinders
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Filters (AREA)
- Lenses (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention relates to a common-caliber infrared free-form surface prism optical system with double wave bands and double view fields, which comprises a first free-form surface prism, a second free-form surface prism, a narrow band filter, a long-wave infrared detector and a near-infrared detector, wherein the first free-form surface prism comprises a high-order aspheric surface, a second free-form surface, a first free-form surface and a diffraction surface which are sequentially connected, the second free-form surface prism comprises an incident surface, an emergent spherical surface, a third free-form surface and a fourth free-form surface which are sequentially connected, the first free-form surface is coincided with the incident surface, incident light is split by the first free-form surface, long-wave infrared light is emitted to the long-wave infrared detector by the diffraction surface after being reflected twice, and near-infrared light is emitted to the near-infrared detector from the narrow band filter after being reflected twice. Compared with the prior art, the invention has the advantages of compact structure, wide application range, good imaging quality and the like.
Description
Technical Field
The invention relates to the field of optical systems and device design, in particular to a common-caliber infrared free-form surface prism optical system with dual bands and dual fields of view.
Background
The infrared imaging system has good concealment, strong anti-interference capability and certain target disguising recognition capability, and is widely applied to the fields of infrared night vision, infrared detection, infrared guidance and the like. However, a single-band imaging system is susceptible to regional terrain, ambient temperature, target camouflage, and other factors that affect the accuracy of the final detection. If one infrared detection imaging system can acquire target information in two wave bands, the interference information of a complex background can be inhibited, the accuracy of target detection is improved, and the false alarm rate in an early warning, searching and tracking system is reduced. If an infrared imaging system has two fields of view with different sizes, the target search of a large field of view and the accurate tracking of a small field of view can be realized. However, the traditional dual-band and dual-field infrared imaging adopts a multi-chip combined refraction, reflection or refraction and reflection type lens design, and the system has a large volume and a complicated mechanical structure design, so that the system is not beneficial to complex and variable environmental application. The free-form surface prism has the characteristics of more design optimization variables, flexible structure and high system integration, and the optical efficiency of the free-form surface prism is much higher than that of the traditional multi-piece optical lens because the total reflection characteristic of the inner surface of the interface is utilized. At present, optical imaging system design configurations based on free-form surface prisms have been used in augmented reality visual systems in the visible band. The free-form surface prism is introduced into the dual-waveband/dual-field infrared imaging system, so that the comprehensive performance of the traditional dual-waveband/dual-field detection system can be remarkably improved, the design structure can realize low cost, high performance and compact configuration, and the system has very important significance in the fields of space remote sensing, airborne reconnaissance, infrared guidance systems and the like.
At present, studies on free-form surface prism optical systems at home and abroad mainly focus on visual optics and illumination optical systems. Morishima et al, in The design of off-axial optical system coupling of The systematic mirrors with out-of-positional system, originally proposed a free-form prismatic structure for use in head-mounted display systems; hoshi, Yamazaki et al, in the open-axial HMD optical system localization of anatomical surfaces with out-positional system, successively propose see-through head-mounted display systems for augmented reality; four bifocal overhead display visualization system designs were proposed by chengdu et al of beijing university of physical engineering in light weighted spatial-multiplexed dual focal-plane head-mounted display using two front images (COL 11(3),031201,2013), but the final imaging quality of the above design configurations was only available for visualization systems. The lens is a free-form surface prism infrared lens with 24 degrees of field angle and only 22mm (longest dimension) in monolitic freeform element (proc. spie 9575,95750G,2015) mentioned by s.r. kiontke et al, and the working band of the lens is a long-wave infrared band made of germanium, but the system is a single-channel long-wave infrared system, and the design configuration does not involve a dual-band and dual-field imaging system, and does not substantially correct chromatic aberration of the system, and the imaging quality is not ideal.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a common-caliber infrared free-form surface prism optical system with two wave bands and two view fields, and the common-caliber infrared free-form surface prism optical system has the advantages of compact structure, wide application range and good imaging quality.
The purpose of the invention can be realized by the following technical scheme:
a common-caliber infrared free-form surface prism optical system with double wave bands and double view fields comprises a first free-form surface prism, a second free-form surface prism, a narrow band filter, a long wave infrared detector and a near infrared detector, wherein the first free-form surface prism comprises a high-order aspheric surface, a second free-form surface, a first free-form surface and a diffraction surface which are sequentially connected, the second free-form surface prism comprises an incidence surface, an emergent spherical surface, a third free-form surface and a fourth free-form surface which are sequentially connected, the first free-form surface is superposed with the incidence surface, the high-order aspheric surface is superposed with the incidence pupil, a light splitting film is plated on the first free-form surface, incident light is split through the first free-form surface after being incident through the aspheric surface, wherein the long wave infrared light is reflected through the first free-form surface and the second free-form surface and then is emitted to the long wave infrared detector through the diffraction surface, the near-infrared light rays sequentially transmit through the first free-form surface and the incident surface, sequentially pass through the third free-form surface and the fourth free-form surface, are reflected by the curved surfaces, sequentially pass through the emergent spherical surface and the narrow-band filter, and are emergent to the near-infrared detector.
Furthermore, the F number of the optical system is 0.8-3.0, the diameter of an entrance pupil is 15-50 mm, the F number of the long-wave infrared band is 0.8-1.5, the F number of the near-infrared band is 1.5-3, the field angles of the long-wave infrared band in the horizontal direction and the vertical direction are respectively 30 degrees and 24 degrees, the field angles of the near-infrared band in the horizontal direction and the vertical direction are respectively 15 degrees and 12 degrees, and imaging is realized and the long-wave infrared detector and the near-infrared detector are filled.
Further, the included angle range between the first free-form surface and the optical axis is 18 degrees to 25 degrees, the included angle range between the second free-form surface and the first free-form surface is 35 degrees to 50 degrees, the included angle range between the third free-form surface and the optical axis is 18 degrees to 25 degrees, and the included angle range between the third free-form surface and the fourth free-form surface is 35 degrees to 50 degrees.
Furthermore, the adjacent edges of the high-order aspheric surface, the second free-form surface and the diffraction surface are not interfered with each other, the adjacent edges of the first free-form surface, the diffraction surface and the emergent spherical surface are not interfered with each other, and the adjacent edges of the third free-form surface and the emergent spherical surface are not interfered with each other.
Furthermore, the axial distance between the emergent spherical surface and the narrow band filter is 3-15 mm, the axial distance between the narrow band filter and the near infrared detector is 3-10 mm, and the axial distance between the diffraction surface and the long wave infrared detector is 3-7 mm.
Furthermore, the size of a single pixel of the long-wave infrared detector is 17 micrometers or 30 micrometers, the total pixel number is 640 multiplied by 480, the size is 10.88mm multiplied by 8.16mm, the range of a long-wave infrared response waveband is 8 micrometers to 12 micrometers, the central working wavelength of long-wave infrared is 10 micrometers, the size of a single pixel of the near-infrared detector is 10 micrometers or 12 micrometers, the total pixel number is 1280 multiplied by 1024, the size is 12.8mm multiplied by 10.24mm, and the central working wavelength of near infrared is 1.064 micrometers.
Compared with the prior art, the invention has the following beneficial effects:
(1) the imaging device adopts two free-form surface prisms to realize the imaging of double wave bands and double viewing fields, the angle design is adopted, the incident light is totally internally reflected on each reflecting surface, the long-wave infrared light and the near-infrared light are respectively emitted from different free-form surface prisms, the structure is compact and light, the integration level is high, the off-axis system aberration is reduced, the incident long-wave infrared light is emitted from a diffraction surface after being internally reflected twice, the energy efficiency is high, the resolution ratio is high, the relative aperture is large, the chromatic aberration of the system is corrected without different transmission materials, meanwhile, a double optical path system with different viewing field amplification ratios can be designed and optimized according to the use requirements, the optimization variables are more, the target search of a large viewing field and the accurate tracking of a small viewing field can be realized, and the application range is wide;
(2) in the invention, the entrance pupil is superposed with the high-order aspheric surface, and the optical system has a compact structure.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a light path diagram of a medium-long wave infrared channel;
FIG. 3 is a light path diagram of a mid-near infrared channel;
FIG. 4 is a dot diagram of a long wave infrared channel;
FIG. 5 is a dot-column diagram of the mid-near infrared channel;
FIG. 6 is a graph of MTF for a medium and long wavelength infrared channel;
FIG. 7 is a graph of MTF for the mid-near infrared channel;
the reference numbers in the figures illustrate:
1. the optical fiber laser comprises a first free-form surface prism, a second free-form surface prism, a narrow band filter, a long-wave infrared detector, a near infrared detector, a high-order aspheric surface, a first free-form surface, a second free-form surface, a diffraction surface, a third free-form surface, a diffraction surface, a free-form surface, a prism, a free-form surface, and a free-form surface, a prism, a second free-form surface, a second free-form, a second free-form surface, a second free-form, a second free-form, a third.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
A common-caliber infrared free-form surface prism optical system with double wave bands and double fields of view is disclosed, as shown in figure 1, figure 2 and figure 3, comprising a first free-form surface prism 1, a second free-form surface prism 2, a narrow band filter 3, a long wave infrared detector 4 and a near infrared detector 5, wherein the first free-form surface prism 1 comprises a high-order aspheric surface 101, a second free-form surface prism 103, a first free-form surface 102 and a diffraction surface 104 which are connected in sequence, the second free-form surface prism 2 comprises an incidence surface 204, an emergent spherical surface 203, a third free-form surface 201 and a fourth free-form surface 202 which are connected in sequence, the first free-form surface 102 is superposed with the incidence surface 204, the high-order aspheric surface 101 is superposed with the incidence pupil, the first free-form surface 102 is plated with a light splitting film, the incident light is split by the first free-form surface 102 after being incident through the high-order aspheric surface 101, wherein the infrared light is reflected by the first free-form surface 102 and the second free-form surface 103 and then is emitted to the long wave infrared detector 4 through the diffraction surface 104, the near-infrared light sequentially transmits through the first free-form surface 102 and the incident surface 204, sequentially passes through the third free-form surface 201 and the fourth free-form surface 202, sequentially passes through the emergent spherical surface 203 and the narrow-band filter 3, and then is emergent to the near-infrared detector 5.
The smaller the F number of the optical system is, the larger the aperture of an entrance pupil is, the stronger the light collecting capacity is, the larger the effective entrance pupil is, the smaller the corresponding field of view is, the size of the entrance pupil with the size is selected according to the models and parameters of two groups of infrared response detectors, the field of view and the light collecting capacity are balanced, the F number of the optical system is 0.8-3.0, the diameter of the entrance pupil is 20mm, the F number of the long-wave infrared band is 0.8-1.5, the F number of the near-infrared band is 1.5-3, the field angles of the long-wave infrared band in the horizontal direction and the vertical direction are 30 degrees and 24 degrees respectively, the field angles of the near-infrared band in the horizontal direction and the vertical direction are 15 degrees and 12 degrees respectively, and imaging is realized to fill the long-wave infrared detector 4 and the near-infrared detector 5.
The included angle range of the first free-form surface 102 and the optical axis is 18 degrees to 25 degrees, the included angle range of the second free-form surface 103 and the first free-form surface 102 is 35 degrees to 50 degrees, the included angle range of the third free-form surface 201 and the optical axis is 18 degrees to 25 degrees, and the included angle range of the third free-form surface 201 and the fourth free-form surface 202 is 35 degrees to 50 degrees.
The adjacent edges of the high-order aspheric surface 101, the second free-form surface 103 and the diffraction surface 104 are not interfered with each other, the adjacent edges of the first free-form surface 102, the diffraction surface 104 and the exit spherical surface 203 are not interfered with each other, and the adjacent edges of the third free-form surface 201 and the exit spherical surface 203 are not interfered with each other.
The axial distance between the emergent spherical surface 203 and the narrow band filter 3 is 13.5mm, the axial distance between the narrow band filter 3 and the near infrared detector 5 is 10mm, and the axial distance between the diffraction surface 104 and the long-wave infrared detector 4 is 4 mm.
The single pixel size of the long-wave infrared detector 4 is 17 mu m, the total pixel number is 640 multiplied by 480, the size is 10.88mm multiplied by 8.16mm, the long-wave infrared response waveband range is 8 mu m to 12 mu m, the central working wavelength of long-wave infrared is 10 mu m, the single pixel size of the near-infrared detector 5 is 10 mu m, the total pixel number is 1280 multiplied by 1024, the size is 12.8mm multiplied by 10.24mm, and the central working wavelength of near infrared is 1.064 mu m.
The optical system parameters of the long-wave infrared channel and the near-infrared channel are respectively shown in table 1 and table 2:
TABLE 1 optical system parameter table for long-wavelength infrared channel
TABLE 2 optical system parameter table for near infrared channel
Because the refractive index of the transmission material changes with the wavelength, the light rays with different wavelengths emitted by an object point cannot be converged at one point after passing through the optical system to form colored diffuse spots, the optical system adopts internal reflection, the chromatic aberration is corrected through the diffraction surface 104 when the incident light rays pass through the same material, and the chromatic aberration of the optical system can be effectively eliminated through the independence and the negative property of the chromatic dispersion characteristic of the diffraction surface 104 and the material.
FIGS. 4 and 5 are respectively corresponding to a point diagram of the optical system in the long-wave infrared channel and the near-infrared channel, the point diagram shows the size distribution of the diffuse speckles on the image plane, the chromatic aberration is shown as the size of the diffuse speckles, and the design result is close to the diffraction limit of the airy black spots as can be seen from the point diagram of the long-wave infrared channel, so that the chromatic aberration of the optical system is corrected;
FIGS. 6 and 7 are corresponding MTF graphs of the optical system in the long-wave infrared channel and the near-infrared channel, respectively, the MTF graphs are full-field transfer function graphs, it can be seen from the MTF graphs of the long-wave infrared channel that the design of the optical system is close to the diffraction limit, the value of the designed transfer function is higher than 0.3 at 29lp/mm, and the use requirement of the long-wave infrared detector can be met; the MTF graph of the near-infrared channel shows that the transfer function value is higher than 0.3 at 50lp/mm, and the use requirement of the near-infrared detector can be met.
The common-caliber infrared free-form surface prism optical system with the double wave bands and the double view fields is suitable for large relative aperture and high resolution, is light and high in integration level, can be directly processed into a lens by adopting a single-point diamond turning process or manufactured by pressing, is superior to similar design configurations in applicability, and can ensure lower manufacturing cost.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A common-caliber infrared free-form surface prism optical system with two wave bands and two view fields is characterized by comprising a first free-form surface prism (1), a second free-form surface prism (2), a narrow band filter (3), a long wave infrared detector (4) and a near infrared detector (5), wherein the first free-form surface prism (1) comprises a high-order aspheric surface (101), a second free-form surface (103), a first free-form surface (102) and a diffraction surface (104) which are sequentially connected, the second free-form surface prism (2) comprises an incident surface (204), an emergent spherical surface (203), a third free-form surface (201) and a fourth free-form surface (202) which are sequentially connected, the first free-form surface (102) and the incident surface (204) are overlapped, and incident light is split through the first free-form surface (102) after being incident through the high-order aspheric surface (101), the long-wave infrared light is reflected by the first free-form surface (102) and the second free-form surface (103) and then emitted to the long-wave infrared detector (4) through the diffraction surface (104), the near-infrared light sequentially transmits through the first free-form surface (102) and the incidence surface (204), sequentially passes through the third free-form surface (201) and the fourth free-form surface (202) and is reflected, and then sequentially passes through the emergent spherical surface (203) and the narrow-band filter (3) and then is emitted to the near-infrared detector (5).
2. The optical system of claim 1, wherein the optical system has an F-number of 0.8 to 3.0 and an entrance pupil diameter of 15mm to 50 mm.
3. The optical system of claim 1, wherein the angle between the first free-form surface (102) and the optical axis is in the range of 18 ° to 25 °, the angle between the second free-form surface (103) and the first free-form surface (102) is in the range of 35 ° to 50 °, the angle between the third free-form surface (201) and the optical axis is in the range of 18 ° to 25 °, and the angle between the third free-form surface (201) and the fourth free-form surface (202) is in the range of 35 ° to 50 °.
4. A common-caliber infrared freeform prism optical system with dual-band and dual-field of view as claimed in claim 1 wherein the high order aspheric surface (101) is coincident with the entrance pupil.
5. The optical system of claim 1, wherein the adjacent edges of the high-order aspheric surface (101), the second free-form surface (103) and the diffraction surface (104) are not interfered with each other, the adjacent edges of the first free-form surface (102), the diffraction surface (104) and the exit spherical surface (203) are not interfered with each other, and the adjacent edges of the third free-form surface (201) and the exit spherical surface (203) are not interfered with each other.
6. The optical system of claim 1, wherein the first free-form surface (102) is coated with a beam splitting film.
7. The optical system of claim 1, wherein the axial distance between the emergent spherical surface (203) and the narrow band filter (3) is 3 mm-15 mm, the axial distance between the narrow band filter (3) and the near infrared detector (5) is 3 mm-10 mm, and the axial distance between the diffraction surface (104) and the long wave infrared detector (4) is 3 mm-7 mm.
8. The common-caliber infrared free-form surface prism optical system having two bands and two fields of view as set forth in claim 1, wherein the field angles in the horizontal direction and the vertical direction of the long-wave infrared band are 30 ° and 24 °, respectively, and the field angles in the horizontal direction and the vertical direction of the near-infrared band are 15 ° and 12 °, respectively.
9. The common-caliber infrared free-form surface prism optical system with two wave bands and two visual fields as claimed in claim 1, characterized in that the long wave infrared detector (4) has a single pixel size of 17 μm or 30 μm, a total number of pixels of 640 x 480, a size of 10.88mm x 8.16mm, a long wave infrared response wave band range of 8 μm to 12 μm, and a central operating wavelength of the long wave infrared of 10 μm.
10. The optical system of claim 1, wherein the near infrared detector (5) has a single pixel size of 10 μm or 12 μm, a total number of pixels of 1280 × 1024, a size of 12.8mm × 10.24mm, and a central operating wavelength of 1.064 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010593406.0A CN111751914B (en) | 2020-06-27 | 2020-06-27 | Common-caliber infrared free-form surface prism optical system with double wave bands and double view fields |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010593406.0A CN111751914B (en) | 2020-06-27 | 2020-06-27 | Common-caliber infrared free-form surface prism optical system with double wave bands and double view fields |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111751914A CN111751914A (en) | 2020-10-09 |
| CN111751914B true CN111751914B (en) | 2021-09-03 |
Family
ID=72677270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010593406.0A Active CN111751914B (en) | 2020-06-27 | 2020-06-27 | Common-caliber infrared free-form surface prism optical system with double wave bands and double view fields |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111751914B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415731A (en) * | 2020-11-30 | 2021-02-26 | 南京信息工程大学 | Free-form surface prism optical system with large relative aperture and diffraction surface |
| CN115166957B (en) * | 2022-06-17 | 2023-05-02 | 苏州大学 | Dual-band spectrum imaging method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03113411A (en) * | 1989-09-28 | 1991-05-14 | Nec Corp | Scanning type image pickup device |
| CN105334608A (en) * | 2015-12-05 | 2016-02-17 | 中国航空工业集团公司洛阳电光设备研究所 | Prism optical system |
| WO2018027299A1 (en) * | 2016-08-12 | 2018-02-15 | Bacque, James Benson | Large exit pupil wearable near-to-eye vision systems exploiting freeform eyepieces |
| CN107907974A (en) * | 2017-12-22 | 2018-04-13 | 浙江大华技术股份有限公司 | A kind of double-view field camera lens |
| WO2018209046A1 (en) * | 2017-05-10 | 2018-11-15 | Washington University | Snapshot photoacoustic photography using an ergodic relay |
| CN110146166A (en) * | 2019-06-13 | 2019-08-20 | 中国科学院光电研究院 | A kind of free curved surface prism spectrum system |
| CN110376738A (en) * | 2019-06-13 | 2019-10-25 | 浙江大学 | A kind of light-duty free form surface waveguide type visual optical imaging device of big visual field and its near-eye display system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732734B (en) * | 2018-05-30 | 2020-12-25 | 南京信息工程大学 | Free-form surface-based fast-focus ratio reflection type long-wave infrared viewfinder optical system |
-
2020
- 2020-06-27 CN CN202010593406.0A patent/CN111751914B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03113411A (en) * | 1989-09-28 | 1991-05-14 | Nec Corp | Scanning type image pickup device |
| CN105334608A (en) * | 2015-12-05 | 2016-02-17 | 中国航空工业集团公司洛阳电光设备研究所 | Prism optical system |
| WO2018027299A1 (en) * | 2016-08-12 | 2018-02-15 | Bacque, James Benson | Large exit pupil wearable near-to-eye vision systems exploiting freeform eyepieces |
| WO2018209046A1 (en) * | 2017-05-10 | 2018-11-15 | Washington University | Snapshot photoacoustic photography using an ergodic relay |
| CN107907974A (en) * | 2017-12-22 | 2018-04-13 | 浙江大华技术股份有限公司 | A kind of double-view field camera lens |
| CN110146166A (en) * | 2019-06-13 | 2019-08-20 | 中国科学院光电研究院 | A kind of free curved surface prism spectrum system |
| CN110376738A (en) * | 2019-06-13 | 2019-10-25 | 浙江大学 | A kind of light-duty free form surface waveguide type visual optical imaging device of big visual field and its near-eye display system |
Non-Patent Citations (1)
| Title |
|---|
| 红外双波段双视场共光路光学系统;张葆 等;《光学精密工程》;20150228;第23卷(第2期);第395-401页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111751914A (en) | 2020-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9651763B2 (en) | Co-aperture broadband infrared optical system | |
| CN102495474B (en) | Visible light/long-wave infrared broad band spectrum joint focusing optical imaging system | |
| CN107991686B (en) | Infrared-visible dual-waveband photoelectric detection system and optical axis deflection angle measuring method | |
| CN103293681B (en) | Two-channel optical device with ultra large diameter and ultra long focal distance | |
| CN111751915B (en) | Compact infrared viewfinder optical system based on free-form surface prism | |
| CN111751914B (en) | Common-caliber infrared free-form surface prism optical system with double wave bands and double view fields | |
| CN102175318A (en) | Mutually-visual-field common-aperture multi-spectral imaging system with Cassegrain front end | |
| CN104977621A (en) | Visible-light-and-medium-wave-infrared composite detection system | |
| CN101634744A (en) | Foldback-type bi-spectral gaze imaging system | |
| CN110488246A (en) | A kind of big visual field receiving system of two dimension MEMS scanning laser radar | |
| CN112305721A (en) | Infrared dual-waveband telescopic optical system | |
| CN105424187B (en) | Refrigeration mode LONG WAVE INFRARED imaging spectrometer based on Dyson structures | |
| CN112305739B (en) | Infrared dual-band imaging optical system combining common optical path wide and narrow fields of view | |
| CN109870792B (en) | Coaxial all-trans optical imaging system | |
| CN214151214U (en) | Infrared dual-band telescopic optical system, search tracking system and forward-looking infrared system | |
| CN110471173B (en) | Four-reflection medium wave infrared viewfinder optical system with diffraction surface | |
| CN106019534B (en) | One kind 1.3~5um broadband infrared imaging camera lenses | |
| CN115185074B (en) | Catadioptric miniaturized shortwave infrared imaging optical system | |
| CN102494769B (en) | Single-channel multiple reflection annular multispectral imaging optical system | |
| GB2531726A (en) | Compact multispectral wide angle refractive optical system | |
| CN107121760A (en) | A kind of infrared refractive and reflective panorama camera lens of broadband refrigeration | |
| EP1286208A1 (en) | Image sensor | |
| CN108345095A (en) | A kind of low veiling glare round-the-clock star tracker optical texture of wide cut | |
| CN112946907A (en) | Large-view-field visible-infrared integrated compact optical camera | |
| CN103064185B (en) | Infrared 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 |