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A dim target detection device under strong skylight background

A target detection and skylight technology, which is used in the exploration of optical devices, astronomical navigation, etc., can solve the problems of low detection star magnitude and poor application environment adaptability of dim targets, and achieve the effect of high energy utilization rate and improved suppression ability.

Active Publication Date: 2021-07-02
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Based on this, it is necessary to provide a faint target detection device under a strong skylight background for the problems of low faint target detection magnitude and poor adaptability to the application environment in the existing faint target detectors.

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  • A dim target detection device under strong skylight background
  • A dim target detection device under strong skylight background
  • A dim target detection device under strong skylight background

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Embodiment Construction

[0015] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0016] In one of the examples, as figure 1 As shown, the present invention discloses a faint target detection device under a strong skylight background, including a shearing interferometer 10, a detector 30 and a weak signal detection device 40. The device uses the shearing interferometer 10 to realize the interference of target light to form a shearing Cut the interference fringes, and use the shearing interferometer 10 to realize the periodic reciprocating motion of the shearing interference fringes, and then realize the frequency modulation of the target optical signal, and then use the detector 30 to convert the two transverse shearing beams formed by the shearing interferometer 10 The optical signal is converted into an electrical signal, and finally the weak signal detection device 40 is used to detect the mo...

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Abstract

The invention relates to a dim target detection device under a strong skylight background, which belongs to the technical field of optical search and tracking equipment and star sensors. The instrument realizes the periodic back-and-forth movement of the shearing interference fringes, and then realizes the frequency modulation of the target optical signal, and then uses the detector to convert the optical signals of the two transverse shearing beams into electrical signals, and finally uses the weak signal detection equipment to detect the modulated The target signal is detected and the influence of the main noise including the skylight background is suppressed to realize the detection of the faint target signal. The dim target detection device under strong skylight background proposed by the present invention can overcome the problem that short-distance targets are difficult to interfere, can greatly improve the energy utilization rate, and improves the dim target detection magnitude and the ability to suppress the skylight background.

Description

technical field [0001] The invention relates to the technical field of optical search and tracking equipment and star sensors, in particular to a dim target detection device under strong skylight background. Background technique [0002] Optical search and tracking technology is a widely used general-purpose technology, which can be used for precise pointing of laser beams, position and attitude maintenance of flying platforms, and high-precision tracking and aiming of large-aperture photoelectric telescopes. A star tracking device, usually called a star sensor, obtains the position and attitude information of an aircraft (satellite, etc.) by detecting the star field distribution in a large area. [0003] The existing optical search and track devices are affected by the sun and skylight background, and their detection period, detection capability and measurement accuracy are severely restricted. However, the existing methods for suppressing skylight background noise (mainly...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V8/10G01C21/02
CPCG01C21/02G01V8/10
Inventor 董磊王建立李洪文王斌
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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