A New Method for Testing the Asphere Surface with a Liquid Crystal Spatial Light Modulator

Di Fan

doi:10.4028/www.scientific.net/AMM.599-601.27

Paper Titles

Analysis of Factors Influencing the Performance of Q460 Steel
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Friction and Rheological Properties of Meso-Porous MCM-41/Unsaturated Polyester In Situ Composites
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Experimental Study of Low-Pressure Water Jet Assisted Laser Drilling on Al₂O₃ Ceramic
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A New Method for Testing the Asphere Surface with a Liquid Crystal Spatial Light Modulator
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Comparative Study of Different Cadmium Salts on Nano-Structured CdS Thin Films Prepared by CBD
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Corrosion Resistance of X52 Pipeline Steel at Sea Mud Zone
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Effect of Mn (II) Ion on Abrasive-Free Polishing of Hard Disk Substrate
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 599-601A New Method for Testing the Asphere Surface with...

A New Method for Testing the Asphere Surface with a Liquid Crystal Spatial Light Modulator

Abstract:

Due to the special properties of asphere lens, the testing of it is more difficult than that of spherical lens. In this paper, the development of a new method using the liquid crystal spatial light modulator (SLM) to measure the accuracy of an aspheric surface is presented. The surface form was measured using a new component as the compensator lens in conjunction to provide an interferogram representing the aspheric form deviation from the nominal. Interferograms are decoded using a spatial-carrier phase shifting technique. The interferometric data is compared to data obtained using a contact stylus profilometer. The system can be mounted over a polishing machine and used for on-line testing of aspheric mirror surfaces.

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Periodical:

Applied Mechanics and Materials (Volumes 599-601)

Pages:

27-31

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.599-601.27

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Online since:

August 2014

Authors:

Di Fan*

Keywords:

Asphere Testing, Optical Polish, Spatial Light Modulator

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* - Corresponding Author

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