Abstract

In this paper, we report the use of a nematic liquid crystal material filled cell in transmission mode as a voltage controlled phase modulator for the characterization of microlenses. In one arm of the Mach–Zehnder interferometer, a nematic liquid crystal filled cell with DC voltage connection was placed, and in another arm of the interferometer microlenses with a 4-F imaging system were placed. Interference takes place between the light beams coming from the two arms of the Mach–Zehnder interferometer, one after passing through the nematic liquid crystal cell and another after passing through microlenses. Interference patterns were recorded by a CCD camera. By applying DC voltage to the nematic liquid crystal filled cell, various phase shifted interferograms were recorded, and from phase shifted interferograms, the shape and size of microlenses were determined. The results of the reconstructed profile of the microlenses are compared with white-light profilometry.

Measurement of birefringence of nematic liquid crystal material by multiple-wavelength interferometry using nearly common-path single-stage Mach–Zehnder interferometer

M. Inam, V. Srivastava, and D. S. Mehta
Appl. Opt. 52(33) 8067-8072 (2013)

Multi-spatial-frequency and phase-shifting profilometry using a liquid crystal phase modulator

Kyung-Il Joo, Chang-Sub Park, Min-Kyu Park, Kyung-Woo Park, Ji-Sub Park, Youngmin Seo, Joonku Hahn, and Hak-Rin Kim
Appl. Opt. 51(14) 2624-2632 (2012)

Liquid-crystal phase-shifting lateral shearing interferometer with improved fringe contrast for 3D surface profilometry

Dalip Singh Mehta, Mohammad Inam, Jai Prakash, and A. M. Biradar
Appl. Opt. 52(25) 6119-6125 (2013)

High-axial-resolution, full-field optical coherence microscopy using tungsten halogen lamp and liquid-crystal-based achromatic phase shifter

Sheng-Hua Lu, Wei-Chang Liu, and Jung-Ping Liu
Appl. Opt. 54(14) 4447-4452 (2015)

Liquid crystal microlens arrays recorded by polarization holography

Ulises Ruiz, Pasquale Pagliusi, Clementina Provenzano, Eugenia Lepera, and Gabriella Cipparrone
Appl. Opt. 54(11) 3303-3307 (2015)