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Optical Engineering

Determination of the focal length of microlens array by spherical wavefronts
Author(s): Marimuthu Senthil Kumar; Rahul Sharma; Chittur Subramanian Narayanamurthy; Alur Seelin Kiran Kumar
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Paper Abstract

We propose an experimental method consisting of a standard Fizeau interferometer with transmission sphere (TS) for the determination of the focal length of microlens array (MLA) by spherical wavefronts. The TS is axially translated to produce a spherical wavefront of different curvatures with respect to the MLA. The align mode provision of the interferometer helps to monitor the tilt of the MLA with respect to the spherical wavefront. The focal length is determined from the measured distance of adjacent image spots for various spherical wavefronts at the focal plane of the MLA. Error analysis and experimental demonstration with an off-the-shelf MLA are addressed here.

Paper Details

Date Published: 24 June 2014
PDF: 4 pages
Opt. Eng. 53(6) 064102 doi: 10.1117/1.OE.53.6.064102
Published in: Optical Engineering Volume 53, Issue 6
Show Author Affiliations
Marimuthu Senthil Kumar, Space Applications Ctr. (India)
Rahul Sharma, Space Applications Ctr. (India)
Chittur Subramanian Narayanamurthy, Indian Institute of Space Science and Technology (India)
Alur Seelin Kiran Kumar, Space Applications Ctr. (India)

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