Publication: Assessment of optical aberrations of tunable liquid crystal cylindrical microlenses
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2013-09-15
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Abstract
Cylindrical lenses are promising devices for a wide range of applications [1-3]. This kind
of lenses can be used in some novel applications such as light-sheet microscopy, line
illumination microscopy or autostereoscopic devices. However, as any kind of lens, the main
drawback is the generation of optical aberrations. These aberrations determine the image
quality of an optical system. Interferometrists often like to represent wavefronts as Zernike
polynomials. Zernike polynomials have been widely used because, unlike other polynomial
set, they are orthogonal over a unit circle and represent balanced classical optical aberrations,
yielding minimum variance over a circular pupil [4]. These characteristics are lost when non
circular pupils are employed. Some research works have developed new coefficients for
different pupils [5]. Notwithstanding that, they were targeted for rotational symmetric optics
[6]. In the referred paper, 2D Chebyshev polynomials related to some Seidel aberrations are
described. These ones form a useful orthogonal basis for optics of rectangular apertures,
making them an attractive option for cylindrical lenses.
In this work, optical aberrations in a liquid crystal (LC) cylindrical lens have been modeled
and measured, for the first time. We have developed our own application specifically to
extract the 3D wavefront from an interference pattern. This software tool also allows us to
obtain the optical aberrations based on Chebyshev polynomials. A tunable LC cylindrical lens
has been designed and manufactured. Optical aberrations have been assessed by adjusting the
control voltage applied to the device.
Description
[Poster of]: XX Conference on Liquid Crystals: Chemistry, Physics and Applications (CLC 2013), 15-20 September, 2018, Mikolajki, Poland.
Keywords
Liquid crystal cyindrical microlenses, Optical aberrations, Chebyshev polynomials
Bibliographic citation
XX Conference on Liquid Crystals: Chemistry, Physics and Applications (CLC'2013), 15-20 September, 2018, Mikolajki, Poland. [2] p.