A device for real-time high-precision monitoring of laser ranging beam pointing

Abstract

The invention relates to a device for real-time high-precision monitoring of laser ranging beam pointing, including: a 45° reflector, a transmitting telescope, a right-angle combined reflector, a receiving telescope, a beam splitter, a monitoring CCD, an acousto-optic modulator, and a controllable small hole Aperture, collimating mirror, detector. The emitting laser is emitted by the emitting telescope, most of it passes through the right-angle combined reflector in the emitting light path, and part of it is reflected by the right-angle combined reflector, and is transmitted parallel to the emitting light path and opposite to the receiving telescope to the beam splitter. A small part passes through the beam splitter and is detected by the monitoring CCD, while the rest is reflected. When the acousto-optic modulator is working, the reflected beam is deflected to the edge of the controllable aperture diaphragm, which avoids light damage to the detector; when the acousto-optic modulator is not working, the laser echo can be transmitted through the controllable aperture. Aperture diaphragm, collimating mirror, to detector. The real-time monitoring of beam pointing is beneficial to the real-time aiming of detection targets in laser ranging, and promotes the development of laser ranging, especially satellite laser ranging.

Description

technical field [0001] The invention relates to the field of laser ranging, in particular to a device for real-time monitoring of laser ranging beam pointing. Background technique [0002] Laser ranging has excellent characteristics such as high precision and long ranging distance, and is widely used in the position measurement of space objects such as satellites and space debris. Artificial satellites are widely used in communication, scientific survey and experiment, military defense, meteorology and other fields. The global positioning system GPS and my country's Beidou positioning system have been widely used in people's social activities and life, and have profoundly changed people's way of life. , to promote human development. At the same time, in the process of human beings exploring space, more and more artificial satellites and deep space probes have been launched into space. In the harsh space environment of high radiation, vacuum, and zero gravity, these human-ma...

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Problems solved by technology

However, it is mentioned in the article that it is difficult to overlap two beams of different colors, and it is difficult to adjust the parallelism to within ±15 arcseconds; the follow-up uses laser emission to adjust and monitor at low energy to avoid narrow-band filtering in the eyes and the receiving system. Due to the damage of the light sheet and photomultiplier tube, there is a certain deviation between the direction of the low-power laser beam and the direction of the high-power laser, and there is still a deviation of ±10 arc seconds when the laser is emitted at full power

In the actual star measurement process, the laser still needs to be emitted at full power output, so that when the full-power laser is emitted, it will cause damage to the receiving system, which increases the difficulty of real-time high-precision monitoring of the laser beam when the full-power laser is emitted.

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