Four-hole difference image moving atmosphere optical parameter measurement instrument

A differential image and optical parameter technology, applied in the field of atmospheric optics, can solve the problems of inaccurate measurement, difficult engineering application, and high maintenance costs, and achieve the effects of shortening the length of the instrument, improving stability, and reducing mechanical vibration.

Inactive Publication Date: 2010-02-17
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some scholars put forward the concept of using image speed difference to measure wind speed. This method is based on studying an arrival angle direction, assuming the wind direction in advance, and then calculating the wind speed. In fact, the wind speed and wind direction in the speed difference formula are closely related, and the wind direction changes continuously during the measurement process. , engineering application is somewhat difficult
These wind measurement methods either have high equipment costs, high maintenance costs, or inaccurate measurements

Method used

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  • Four-hole difference image moving atmosphere optical parameter measurement instrument
  • Four-hole difference image moving atmosphere optical parameter measurement instrument

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Embodiment Construction

[0017] Please see attached figure 1 . First, the incident light wave of the same target is divided into four beams by the four-hole pupil plate, and enters from the first objective lens of the Schmidt-Cassegrain telescope (referred to as the Cassegrain telescope). The aperture of the Karl's telescope is 356mm and the focal length is 3556mm. The diameters of the four incident sub-holes can be changed to 50mm, 80mm and 100mm respectively according to the needs. The distance between the centers of the two holes in the horizontal and vertical directions is 200mm. The line connecting the centers of adjacent holes forms a square with a side length of 141.4mm. figure 2 shown. The incident light beam passes through the cassette telescope 1 and is confocal with an optical conversion lens 2 with a diameter of φ=10mm and a focal length of f=25mm, and is converted into parallel light and enters the pentaprism 3. Pentaprism 3 wherein the three sides A=B=C=18mm, the adjacent surfaces of...

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Abstract

This invention discloses one four-hole difference image move atmosphere optical parameters measurement device, which comprises four hole iris board, Schmitt and Cassegrain telescope, optical imaging lens, five-angle prism, four prism tamper, plane CCD sensor, image collection card and computer, wherein, the sensor is on focus plane of the lens; due to the split function, the sensor can get four images of same one aim to form rectangle form; base line has six match type to measure atmosphere relative length to get gas 1w samples.

Description

technical field [0001] The invention relates to the field of atmospheric optics, in particular to a measuring device for measuring atmospheric optical parameters. Background technique [0002] The most essential effect of atmospheric turbulent media on light wave transmission is the destruction of coherence. Atmospheric coherence length is defined as the maximum spatial interval at which light wave fields at two different points in the direction of light propagation have transverse coherence during light wave transmission in the atmosphere. In laser atmospheric transmission and adaptive optics phase correction technology, when describing the influence of turbulence effects and evaluating the effect of laser transmission and its phase correction, a widely used physical quantity is the atmospheric coherence length, which is related to the intensity of atmospheric turbulence and laser wavelength It is related to factors such as transmission distance and is a very important cal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01W1/02G01W1/00G01N21/45
Inventor 黄宏华姚永帮朱文越黄印博饶瑞中
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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