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Proceedings Paper

Measurements of particle fields by in-line holography
Author(s): Hongwen Gao; Chuandong Sun; Junjun Qin
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Paper Abstract

In-line holography is introduced in this paper. It is one of the many methods that have been used for the precision metrology for objects in various fields of engineering. Holography is a modern powerful tool to measure and analyze particle fields. A 4-f optical system is applied in in-line holographic recording system. The information of a particle field not only is recorded on a holographic plate but also can be derived from the reconstructed images through a reconstruction system. In the parallel optical field, the analysis of a particle field can be done with different instruments and in different depth of field and different positions. This recording system makes every particle in different spatial positions in the particle field have a same amplification ratio. This will be benefit to the data processing and calibration of the particle field. The interferential patterns formed on recording plate and relationship of the particles and the noise of the background in the particle field are analyzed. Some experimental results of particle fields recorded by in-line holography are presented in this paper. The particle identification and the elimination of noise are discussed at the end of this paper.

Paper Details

Date Published: 23 February 2006
PDF: 5 pages
Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 61503H (23 February 2006); doi: 10.1117/12.676938
Show Author Affiliations
Hongwen Gao, Xi'an Institute of Optics and Precision Mechanics (China)
Chuandong Sun, Xi'an Institute of Optics and Precision Mechanics (China)
Junjun Qin, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 6150:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment

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