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Digital Knife-edge Testing Technology on Spherical Mirror of Large Aperture

Author: ZhangJun
Tutor: CaiBangWei
School: Sichuan University
Course: Optics
Keywords: Surface shape detection Digital knife-edge Quantitative Analysis
CLC: TG71
Type: Master's thesis
Year: 2005
Downloads: 221
Quote: 2
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Abstract


Optical manufacturing technology development , on the surface shape of the large aperture optics detection update requirements. Shadowgraph and interferometric method is used , the surface shape detection methods : the shadow method simple equipment , versatility , sensitivity , and high cost , especially suitable for large mirror polishing repair process in real-time detection . But the the traditional shadow method works is based on eye contrast sensitivity threshold based on the detection accuracy depends on the technical proficiency of the operator , with a strong human factors , and can only be qualitative rather than quantitative detection limit raising the level of the manufacturing process ; interference method precision and high sensitivity , resolution and strong , but poor stability , bulky , difficult to achieve real-time detection of large optical pieces . The great plus large diameter standard interferometer surface difficult to manufacture equipment is expensive , quantitative real-time detection of face and large aperture optics has become one of the topics at the forefront of the research at this stage . On in the shadow of the law , under the digital knife-edge detection technology the traditional incision instrument and CCD image acquisition and processing in real time , computer-aided calculation combined , constitute the digital knife-edge instrument to achieve a rapid quantitative detection of large aperture optics has greatly expanded a knife-edge detection application range. Digital knife-edge instrument due to simple equipment , high accuracy , good value for money , as well as to facilitate real-time detection to make up for the lack of shadowgraph and interferometry , quantitative detection of various optical performance of large aperture optical components , in order to mirror the processing of error correction provide the basis . The paper introduces the domestic and foreign research status quo in the form of optical surface detection and detection methods : shadowgraph and interferometry . On this basis , there is discussed the digital incision detection techniques , and use digital incision detection techniques and the phase shift of the interferometer than the detection of large diameter spherical mirror , verify the feasibility of a digital incision detection techniques .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Cutting tools, abrasives,abrasive tools,fixtures,molds and hand tools > Tool
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