Determination of the focal length of microlens array by spherical wavefronts

Marimuthu Senthil Kumar; Rahul Sharma; Chittur Subramanian Narayanamurthy; Alur Seelin Kiran Kumar

doi:10.1117/1.OE.53.6.064102

24 June 2014 Determination of the focal length of microlens array by spherical wavefronts

Marimuthu Senthil Kumar, Rahul Sharma, Chittur Subramanian Narayanamurthy, Alur Seelin Kiran Kumar

Author Affiliations +

Optical Engineering, Vol. 53, Issue 6, 064102 (June 2014). https://doi.org/10.1117/1.OE.53.6.064102

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.

Citation Download Citation

Marimuthu Senthil Kumar, Rahul Sharma, Chittur Subramanian Narayanamurthy, and Alur Seelin Kiran Kumar "Determination of the focal length of microlens array by spherical wavefronts," Optical Engineering 53(6), 064102 (24 June 2014). https://doi.org/10.1117/1.OE.53.6.064102

Published: 24 June 2014

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