An athermalized large field of view medium-wave infrared optical system
An infrared optical system and field of view technology, applied in optics, optical components, instruments, etc., can solve the problems of large imaging optical system size, unstable system operation, and easy thermalization, etc., to achieve clear imaging and consistent instantaneous field of view , Eliminate the effect of heat difference
Active Publication Date: 2018-11-16
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology
[0003] At present, the infrared optical system imaging system used in the infrared warning system, in order to achieve a good imaging effect, generally uses a large number of lenses, which makes the size of the imaging optical system too large, and it is prone to heating after being installed in the optical lens barrel. , causing problems such as system instability
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[0015] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0016] The athermalized ultra-large field of view mid-wave infrared optical system of this embodiment includes five coaxial single lenses, which are arranged in sequence along the axial direction as a first single lens 1, a second single lens 2, a third single lens 3 and a fourth single lens. Single lens 4 and fifth single lens 5; the first single lens 1 has a negative power and a thickness of 3.5 mm; the second single lens 2 has a negative power and a thickness of 4.0 mm; the third The focal power of the single lens 3 is negative and the thickness is 4.0 mm; the focal power of the fourth single lens 4 is positive and the thickness is 2.0 mm; the focal power of the fifth single lens 5 is positive and the thickness is 3.9 mm; According to the direction of the light path, the first surface of the single lens 1 is an aspheric surface, the first surface of the single...
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The invention relates to an athermalized ultra-large field of view mid-wave infrared optical system, which includes five coaxial single lenses arranged in sequence along the axial direction as a first single lens, a second single lens, a third single lens and a fourth single lens and the fifth single lens; adopting the anti-telephoto optical configuration, a super-large field of view mid-wave infrared optical system (90°×90°, circular field of view 127°) is realized, and the mid-wave infrared optical system using different thermal expansion coefficients Reasonable matching of optical materials, the optical lens barrel is made of common aluminum alloy material, the focal power is distributed, and the athermalization optimization design is carried out, which realizes the passive athermalization design and ensures the temperature of the optical system at -40℃~+60℃ Within the range, it can image clearly without focusing, and the instantaneous field of view corresponding to each pixel is consistent.
Description
technical field [0001] The invention belongs to the field of optical system design, and relates to an athermalized ultra-large field of view mid-wave infrared optical system. Background technique [0002] The application of high-tech weapons makes threats in modern warfare omnidirectional. In the air, aircraft may be attacked from front, rear, left, right, up and down directions at the same time. For targets on land, they may be attacked Attacks from all directions in the air require infrared warning systems and situational awareness systems to have large-scale detection capabilities. Therefore, the military powers in the world have always regarded the large viewing angle staring infrared imaging technology as the key research direction of the infrared warning system. [0003] At present, the infrared optical system imaging system used in the infrared warning system, in order to achieve a good imaging effect, generally uses a large number of lenses, which makes the size of ...
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IPC IPC(8): G02B13/00G02B13/04G02B13/06G02B13/14G02B13/18G02B7/02
CPCG02B7/021G02B13/0045G02B13/008G02B13/04G02B13/06G02B13/14G02B13/18
Inventor 赵珩赵延楚栋刘玉
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC