Optical filter installation method
An installation method and a technology of optical filters, which are applied in the field of optics, can solve the problems of decreased registration accuracy, non-parallel optical filters, and inability to meet the assembly tolerance requirements of optical filters, and achieve the effect of improving assembly accuracy and assembly efficiency
Active Publication Date: 2015-02-11
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology
Since the multi-spectral bands are time-shared imaging, the installation accuracy of the filter will affect the registration accuracy of each band
Usually, the installation of the filter is guaranteed by mechanical processing. The filter is directly loaded into the filter wheel. If the mounting surface of the filter on the filter wheel is not parallel, the filters are not parallel to each other, resulting in The drop in registration accuracy
With the continuous improvement of the imaging quality requirements of aerospace cameras, the requirements for the registration accuracy of multispectral bands are also continuously improved, and higher requirements are put forward for the parallelism of optical filters. The mechanical processing technology can no longer meet the requirements of optical filters. Assembly Tolerance Requirements
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[0023] Combine below Figure 1 ~ Figure 4 The installation method of a kind of optical filter of the present invention is described further:
[0024] 1) Put the filter 1 into the frame 3, and press the pressure ring 2; measure the surface shape of the filter 1 with an interferometer, and the shape of the filter 1 before and after it is installed in the frame 3 should not change, that is, the installation pressure during installation Ring 2 cannot place additional stress on filter 1.
[0025] 2) Install and fix the test tooling 6 on the turntable 9 to support and provide a test platform;
[0026] The test fixture 6 can be designed in different forms according to the actual shape of the filter wheel 5, but it must be ensured that the flatness of the matching surface between the test fixture 6 and the filter wheel 5 is ≤0.005mm.
[0027] 3) The flat crystal glass 7 is regarded as a spherical surface with an infinite radius, and the spherical center image of the flat crystal gla...
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The invention provides an optical filter installation method. Optical flat glass is used for determining the installation datum plane of a test tool; the test tool is used for installing and positioning a filter wheel; the inclination angle of each optical filter is measured by a decentration test instrument; and the inclination of each optical filter assembly is regulated by a regulating gasket. According to the optical filter installation method disclosed by the invention, a plurality of optical filter assemblies are respectively subjected to the decentration test, the inclination is regulated, and the registration precision and the assembling efficiency of each spectrum section of multiple spectrums of a spacecraft camera are improved. The inclination angle of each optical filter assembly is regulated by regulating the thickness of the regulating gasket, and therefore no harsh tolerance requirements need to be put forward when each installation surface of each optical filter on the filter wheel is processed.
Description
technical field [0001] The invention belongs to the field of optics and relates to a method for installing an optical filter. Background technique [0002] In order to realize the switching function of multi-spectral bands in aerospace cameras, it is necessary to set multiple filters in front of the focal plane. Since the multi-spectral bands are time-shared imaging, the installation accuracy of the filter will affect the registration accuracy of each band. Usually, the installation of the filter is guaranteed by mechanical processing. The filter is directly loaded into the filter wheel. If the mounting surface of the filter on the filter wheel is not parallel, the filters are not parallel to each other, resulting in drop in registration accuracy. With the continuous improvement of the imaging quality requirements of aerospace cameras, the requirements for the registration accuracy of multispectral bands are also continuously improved, and higher requirements are put forwa...
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IPC IPC(8): G02B7/00
Inventor 邢辉何徐华焦文春彭宏刚
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH