A novel algorithm for high sensitivity in measuring surface variation based on volume holography
✍ Scribed by Ching-Cherng Sun; Chih-Yuan Hsu; Wei-Chia Su; Yuh Ouyang; Jenq-Yang Chang
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 113 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A novel design for the precise measurement of surface variation based on volume holography is proposed. The volume hologram is a spatial filter, which records the index grating corresponding to the interference fringes by a plane wave and a divergent spherical wave. In the measuring process, a point source attached to a probe is used to read the hologram. A precise measurement can be achieved because the horizontal displacement of the point source is very sensitive to the hologram. This sensitivity is higher than that of a holographic confocal microscopy based on the longitudinal displacement. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 319–321, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10448