Laser receiving and echo device

A laser receiving and echo technology, applied in the field of applied optics, can solve the problems of large loss of light energy, loss of light energy, loss of light, etc.
CN1710836AInactive Publication Date: 2005-12-21UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF ELECTRONIC SCI & TECH OF CHINA
Publication Date
2005-12-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The disclosed device is composed of three pieces of convex lens, one beam splitting plate, and one plane reflector. The said three pieces of convex are placed in parallel and their central lines are coincident. Passing through lens 1 and being received by lens 2, the inquiring light becomes a narrow beam, which is divided by the beam splitting plate into transmitted light and reflected light. The transmitted light reaches to detector in electrooptical signal conversion and information processing part of receiver. Reflected by the plane reflector, reflected light forms an echo wave, which is returned parallel to direction of the inquiring light. May added into the device, diaphragm and filter carries out filtering for inquiring light in space and frequency in order to reduce stray light and noise generated from background radiation. Thus, detecting SNR of answering party is raised. Modulator added modulates echo wave. Features are: small wastage, simple structure, raised SNR etc.
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Description

technical field

[0001] The invention belongs to the technical field of applied optics, and in particular relates to a laser receiving and echo device in laser communication or target recognition. Background technique

[0002] Laser communication is a communication method that uses laser beams as a carrier for communication. The basic laser communication system consists of a transmitter (interrogator), a receiver (responder) and a space atmospheric channel. Laser target recognition is essentially a kind of laser communication under certain conditions. The basic laser target recognition system is also composed of a transmitter (interrogator), a receiver (responder) and a space atmospheric channel. In laser communication or laser target recognition, after the interrogation beam sent by the inquiring party is received by the receiving antenna (usually a receiving device composed of optical lenses) of the responding party, the interrogating beam needs to be divided into two part...

Claims

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