Off-axis three-reflex optical system with 350mm aperture, 1778.9mm focal length and 0.4-5mu m wave band

An off-axis three-mirror and optical system technology, applied in the field of target simulation, can solve problems such as short focal length, inability to meet the calibration and detection of multi-visual axis photoelectric tracking system, and small exit pupil diameter.

Active Publication Date: 2019-01-11
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the target simulation optical system. First, the diameter of the exit pupil is small, which cannot meet the calibration and detection requirements of the multi-axis photoelectric tracking system. Secondly, the focal length is short. The focal length of each detection unit in the photoelectric tracking system is 200 Between ~300mm, according to optical design and actual use requirements, the focal length of the target analog optical sy...

Method used

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  • Off-axis three-reflex optical system with 350mm aperture, 1778.9mm focal length and 0.4-5mu m wave band
  • Off-axis three-reflex optical system with 350mm aperture, 1778.9mm focal length and 0.4-5mu m wave band
  • Off-axis three-reflex optical system with 350mm aperture, 1778.9mm focal length and 0.4-5mu m wave band

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Embodiment Construction

[0012] The 350mm diameter 1778.9mm focal length 0.4 ~ 5μm band off-axis three-mirror optical system of the present invention is composed of a primary mirror 1, a secondary mirror 2 and a triple mirror 3, such as figure 1 As shown, the center of curvature of the mirror surfaces of primary mirror 1, secondary mirror 2, and third mirror 3 is located on a straight line, and the tangents of the intersection points of the straight line and each mirror surface are parallel to each other; the materials of primary mirror 1, secondary mirror 2, and third mirror 3 are all for silicon carbide. The primary mirror 1 and the third mirror 3 are high-order aspheric reflectors with a square aperture, and the secondary mirror 2 is a spherical reflector with a circular aperture; the primary mirror 1 is a positive power reflector with a radius of curvature of -2980mm and a clear aperture of 560mm×570mm, the off-axis distance is 410mm, the secondary mirror 2 is a negative power mirror, the radius o...

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Abstract

The invention relates to an off-axis three-reflex optical system with a 350mm aperture, a 1778.9mm focal length and a 0.4-5mu m wave band, belonging to the technical field of target simulation. The existing off-axis three-reflex optical system has a small aperture and short focal length and lacks a visible light working wave band. The off-axis three-reflex optical system is characterized in that aprimary mirror and a third mirror are high-order aspheric reflectors with square apertures, a secondary mirror is a spherical reflector with a round aperture, the primary mirror is a positive refractive power reflector, and has a -2980mm curvature radius, a 560mm*570mm light aperture, and 410mm off-axis amount, the secondary mirror is a negative refractive power reflector, and has a -2000mm curvature radius and a 81mm light aperture, the third mirror is a positive refractive power reflector, and has a -3613.9mm curvature radius, a 1000mm*1010mm light aperture and a -846mm off-axis amount, a distance between a curvature center of the primary mirror and a curvature center of the secondary mirror is 2650mm, a distance between a curvature center of the secondary mirror and a curvature centerof the third mirror is 2928.4mm, and the off-axis three-reflex optical system has a 350mm aperture, a 1778.9mm focal length and a 0.4-5mu m working wave hand.

Description

technical field [0001] The invention relates to an off-axis three-mirror optical system with a 350mm diameter and a 1778.9mm focal length of 0.4 to 5 μm band, belonging to the technical field of target simulation. Background technique [0002] With the development of photoelectric detection technology, multi-band target imaging detection is more and more widely used in military affairs. Usually, visible light detectors, infrared light detectors, low-light detectors and laser range finders are integrated to form a multi-view The axis photoelectric tracking system can detect, identify and track dynamic targets in multiple bands. [0003] The target simulation optical system can provide infinite dynamic targets for the photoelectric tracking system, and at the same time, cooperate with the calibration of the visual axis consistency of the photoelectric tracking system to assist the test of the dynamic performance of the photoelectric tracking system, that is, the simulation tes...

Claims

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Application Information

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IPC IPC(8): G02B17/06
CPCG02B17/0626G02B17/0636
Inventor 王春艳孙昊刘智王志坚
Owner CHANGCHUN UNIV OF SCI & TECH
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