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Title: Dynamic characterization of MEMS diaphragm using time averaged in-line digital holography
Authors: Miao, Jianmin
Singh, Vijay Raj
Wang, Zhihong
Hegde, Gopalkrishna M.
Anand, Asundi
Keywords: DRNTU::Science::Physics::Optics and light
Issue Date: 2007
Source: Singh, V. R., Miao, J., Wang, Z., Hegde, G. M., & Asundi, A. (2007). Dynamic characterization of MEMS diaphragm using time averaged in-line digital holography. Optics communications, 280(2), 285-290.
Series/Report no.: Optics communications
Abstract: In this paper dynamic characterization of a MEMS diaphragm is investigated using lens-less time averaged in-line digital holography. The analysis and capability of the numerically reconstructed amplitude and phase information from in-line time averaged holograms as applied to MEMS vibration are presented. Particularly the effect of mean static state on the phase in time averaged digital holography is explored. A novel double exposure method is also demonstrated using a diverging object wave suitable for dynamic characterization of small size objects. A phase jump in the static deformation fringes in the vibrating regions is observed and described and can be used for precise analysis of vibration mode shape under simultaneous presence of mean static deformation. A simple and robust tool for dynamic optical metrology of MEMS devices and micro-objects using time averaged in-line digital holography is thus proposed.
ISSN: 0030-4018
DOI: 10.1016/j.optcom.2007.08.030
Rights: © 2007 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Optics Communications, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: ]
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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