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Focus grid generation by in-line holography

Wu, Jigang and Lee, Lap Man and Yang, Changhuei (2010) Focus grid generation by in-line holography. Optics Express, 18 (14). pp. 14366-14374. ISSN 1094-4087.

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We describe a simple way to generate a wide-area high-resolution focus grid by in-line holography and study the factors that impacts its quality. In our holographic recording setup, the reference beam was the direct transmission of the incoming collimated laser beam through a mask coating with thin metal film, and the sample beam was the transmission of the laser through small apertures fabricated on the mask. The interference of the two beams was then recorded by a holographic plate positioned behind the mask. Compared with other recording schemes, the in-line holography scheme has many distinct advantages and is more suitable for generating a wide-area focus grid. We explored the dependence of diffraction quality, including reconstructed focus spot intensity and spot size, on different parameters for recording, such as optical density of the metal film, size of the apertures, and focal lengths. A wide-area focus grid (170 x 138 spots with area 5.1 mm x 4.1 mm) was recorded using the in-line holography scheme for a demonstration.

Item Type:Article
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URLURL TypeDescription
Yang, Changhuei0000-0001-8791-0354
Additional Information:© 2010 Optical Society of America. Received 5 May 2010; revised 27 May 2010; accepted 10 Jun 2010; published 21 Jun 2010. The authors acknowledge Ying Min Wang, Guoan Zheng, and Dr. Xiquan Cui for helpful discussions. This work is supported by Department of Defense grant #W81XWH-09-1-0051.
Funding AgencyGrant Number
Department of DefenseW81XWH-09-1-0051
Issue or Number:14
Classification Code:OCIS codes: (090.0900) Holography; (090.2890) Holographic optical element
Record Number:CaltechAUTHORS:20100806-140136350
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Official Citation:Jigang Wu, Lap Man Lee, and Changhuei Yang, "Focus grid generation by in-line holography," Opt. Express 18, 14366-14374 (2010)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19320
Deposited By: Tony Diaz
Deposited On:06 Aug 2010 22:24
Last Modified:09 Mar 2020 13:19

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