A large aperture and long focal length infrared two-color optical lens and imaging device
An optical lens and long focal length technology, applied in the field of optical imaging, can solve the problems of limited application of small-diameter short-focal length optical systems, and achieve the effect of compact structure and small volume
Active Publication Date: 2021-09-17
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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[0008] In order to solve the problem of limited application of small-aperture and short-focus optical systems in the prior art, the embodiment of the present invention provides a large-aperture long-focus infrared two-color optical lens and an imaging device, which can achieve a large-aperture long focal length, and at the same time have a compact structure and a smaller volume. Small
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[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0036] figure 1 It is an optical path diagram (excluding folding mirrors) of the large-aperture long-focus infrared two-color optical lens of the embodiment of the present invention. figure 2 It is the rear view of the large aperture and long focal length infrared two-color optical lens of the embodiment of the present invention.
[0037] According to the direction of the optical path, it is stipulated that the order of all the lenses in the ...
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Abstract
The invention discloses a large-caliber long-focus infrared two-color optical lens, which includes an afocal optical path, a focusing mirror group, a relay mirror group and four folding mirrors; the afocal optical path includes a main lens with a central hole Reflector, secondary reflector and collimating mirror group, the light is collected by the primary reflector and then reflected to the secondary reflector, the secondary reflector reflects the light again to form a first image between the primary and secondary mirrors On the surface, the light passes through the collimating mirror group and then becomes a narrowed parallel light; the light passing through the collimating mirror group is refracted by the mirror and then passes through the focusing mirror group, and two folding mirrors are placed in the focusing mirror group. The second image plane is formed after the focusing mirror group, and the light is imaged on the infrared focal plane detector through the relay mirror group. The focusing mirror group, the relay mirror group and the four turning mirrors are located in a plane perpendicular to the optical axes of the primary and secondary mirrors. The lens can realize medium-wave / long-wave infrared two-color simultaneous imaging, and has the advantages of large aperture, long focal length, and compact structure.
Description
technical field [0001] The invention relates to the technical field of optical imaging, in particular to a large-caliber long-focus infrared two-color optical lens and an imaging device. Background technique [0002] In the field of infrared imaging, the most widely used spectral bands are mid-wave infrared (3μm-5μm) and long-wave infrared (8μm-12μm). These two bands have different advantages and limitations compared to each other. The best way is to use an infrared dual-color detector to combine the above two bands so that their advantages complement each other. [0003] The number of materials that can be selected for the dual-band infrared system is significantly reduced compared with the single-band infrared system. The materials that can be provided are mainly germanium, zinc selenide, zinc sulfide, barium fluoride, gallium arsenide and some chalcogenide glasses, like AMTIR series and GASIR series. The main problem in the design of dual-band optical systems is that t...
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IPC IPC(8): G02B13/00G02B13/18G02B7/182
CPCG02B13/0065G02B13/008G02B13/18G02B13/002G02B7/182
Inventor 付强张新王灵杰史广维吴洪波
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI