Near backscattered light measurement system resistant to stray light interference

Abstract

The invention belongs to the technical field of optical measurement, and in particular relates to a near backscattered light measurement system resistant to stray light interference. The measuring system includes a sampling device and a measuring device. The sampling device includes a spherical vacuum target chamber and an imaging lens. A target and a diffuse reflection plate with a targeting laser channel are disposed in the spherical vacuum target chamber. The diffuse reflection plate is attached to the inner wall of the spherical vacuum target chamber. The sphere wall of the spherical vacuum target chamber is provided with a measuring window. Near backscattered light produced by a targeting laser incident target is scattered in the opposite direction of the targeting and then is subjected to diffuse reflection through the diffuse reflection plate, and diffuse reflection light penetrates the measuring window and then enters the measuring device through the imaging lens. The imaging lens images the diffuse reflection plate on a one-time image plane, the plane where the one-time image plane is located is provided with an isolation screen, and the isolation screen is provided with aplurality of light holes. According to the near backscattered light measurement system, by arrangement of the isolation screen, the possibility that stray light scattered by the inner wall of the target chamber enters a diagnostic light path is eliminated, and the stray light shielding effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, and in particular relates to a near-backscattered light measurement system resistant to stray light interference. Background technique [0002] Laser nuclear fusion is a kind of artificial controllable nuclear fusion widely used at present. It has very important research significance in both civilian and military fields: it is to explore an inexhaustible clean nuclear energy for human beings; it is used to develop "clean" (No radioactive pollution) nuclear weapons, development of high-energy laser weapons; partial replacement of nuclear experiments. [0003] Therefore, laser nuclear fusion has been highly valued by the world's nuclear powers. Since the second half of the 1970s, Russia, the United States, Japan, France, China, Britain and other countries have successively started the development of high-power laser drivers. The United States is in a leading position in research in thi...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a near-backscattered light measurement system that is resistant to stray light interference, which solves the technical problems of the existing near-backscattered light system that is easily interfered by stray light and has low sampling efficiency

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