Need To Ensure The System Can Transmit Laser Pointer Normally
From traditional technology. The main difficulty of lunar laser pointer ranging lies in the conversion of laser emission and laser reception in the common optical path system. It is necessary to ensure that the system can emit laser light normally. And receive echo signals; telescope tracking pointing accuracy, when the telescope pointing accuracy is 3 seconds. The distance between the center of the laser beam and the lunar reflector when pointing at the moon can be up to 6 kilometers. The largest lunar reflector, Apollo 15, has an effective reflection area of only 3402 square centimeters. This will directly affect the success of the laser pointer moon measurement.
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In addition, laser pointers have beam quality and optical system efficiency. Affects the actual emission energy and quality of the laser. In view of the above problems, the research team independently developed a common optical path lunar laser ranging system for transmitting and receiving conversion mirrors, which realized the optical path receiving and transmitting conversion well. The research team proposed that a local pointing correction model could be established to further improve the pointing accuracy of the telescope. They used a number of stars around the moon's orbit. Before each laser pointer measurement, make a local pointing correction model correction. In order to ensure that the telescope achieves high pointing accuracy on the order of angular seconds in the area of the observation target orbit.The effects of laser power, laser beam scanning speed, feeding speed and precision formula of cladding material were studied. By properly controlling these factors, the formation of poor cladding microstructure can be minimized and even avoided. Specifically, a high-performance cladding system can be built by precisely simulating the cladding process, optimizing the cladding material, and carefully controlling the cladding process to reproduce the results. A typical laser cladding system consists of three main functional units: a powder conveyor, a powder conveyor line and a processing mirror with a powder nozzle. The powder conveyor is a removable unit located next to the laser processing machine. Powder gas mixtures from multiple containers are mixed into powder streams in powder conveyors and then introduced into powder nozzles at precisely set flow rates. The integrated sensor system always ensures a high quality coating.
2020-02-27 05:49:40
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