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Planning method for fairing regions of fairing processing

An area and smoothing technology, applied in the direction of optical devices, instruments, calculations, etc., can solve the problems of reducing smoothing work efficiency, deterioration of low-frequency surface shape, and increasing smoothing time, so as to improve smoothing efficiency and reduce processing area , to prevent the effect of rapid deterioration

Active Publication Date: 2017-05-10
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, in the actual processing process, not all areas have obvious intermediate frequency errors, and intermediate frequency errors generally have a direction or distribution. If the area that needs smoothing and the distribution of intermediate frequency errors cannot be determined, then smoothing processing will not Deteriorating the low-frequency surface shape will also increase the smoothing time and reduce the smoothing work efficiency

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  • Planning method for fairing regions of fairing processing
  • Planning method for fairing regions of fairing processing
  • Planning method for fairing regions of fairing processing

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] Such as figure 1 As shown, the process of planning the smoothing area for smoothing processing is mainly divided into four steps: measuring the surface to be processed; power spectral density (referred to as PSD) analysis; extracting intermediate frequency surface shape errors; planning the smoothing area.

[0029] The present invention will be described below in conjunction with a preferred specific embodiment.

[0030] It should be noted that before using the interferometer to measure the surface shape, the optical elements used in this embodiment have been polished by multiple rounds of small grinding heads. In the polishing process of the small grinding head, since the raster scanning method is used for surfac...

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Abstract

The invention discloses a method for planning fairing regions which comprises the main processes of measuring, analyzing, extracting and planning. Firstly, a surface which is ready to be processed should be measured. Secondly, power spectrum density should be analyzed. Thirdly, frequency-plane errors should be extracted on the basis of Fourier series. Fourthly, the fairing regions should be planned. The method for planning fairing regions has the advantages of improving fairing efficiency and preventing rapid deterioration of the low frequency-plane in the local area by excluding the unsuitable fairing regions.

Description

technical field [0001] The invention belongs to the technical field of optical processing, and in particular relates to a method for planning a smoothing area in smoothing processing. Background technique [0002] The smoothing process is a processing technology that uses the natural smoothing effect of the polishing disc during the polishing process to remove medium and high frequency surface shape errors. As one of the effective means to control the intermediate frequency error on the surface of optical components, smoothing processing technology has many advantages such as low cost, high work efficiency, and good process compatibility, and has become a research hotspot in the field of intermediate frequency error control. [0003] Different from the traditional polishing method, smoothing mainly relies on the rigidity of the smoothing disc to generate a pressure difference on the optical mirror surface, so that the intermediate frequency error converges. Small grinding h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G01B11/24
CPCG01B11/2441G06F30/00
Inventor 吴丽翔魏朝阳邵建达程鑫
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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