Investigation of optical testing with a phase-only liquid crystal spatial light modulator
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TLDR
It is illustrated that the phase-only liquid crystal spatial light modulator (LC SLM) can be used for optical testing and the large phase change and the phase modulation precision are discussed.Abstract:
We illustrate that the phase-only liquid crystal spatial light modulator (LC SLM) can be used for optical testing. The large phase change and the phase modulation precision are discussed. The computer generated holograms (CGH) method is used to acquire the significant phase modulation. And the phase modulating characteristics of the LC SLM are measured. It shows the phase modulation depth is more than 2π and the modulation precision is down to 1/14λ (PV) and 1/100λ (rms) (λ=632.8nm). In order to verify this method, the former surface of a convex lens is tested by ZYGO interferometer. The parallel straight fringes are obtained. It is shown that PV is 1/3λ and rms is 1/20λ after compensated by the LC SLM.read more
Citations
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Journal ArticleDOI
Elimination of a zero-order beam induced by a pixelated spatial light modulator for holographic projection.
TL;DR: A technique is proposed theoretically and verified experimentally to eliminate a zero-order beam caused by a pixelated phase-only spatial light modulator (SLM) for holographic projection that results in higher reconstruction quality and diffraction efficiency.
Proceedings ArticleDOI
LCOS spatial light modulator controlled by 12-bit signals for optical phase-only modulation
Takashi Inoue,Hiroshi Tanaka,Norihiro Fukuchi,Munenori Takumi,Naoya Matsumoto,Tsutomu Hara,Narihiro Yoshida,Yasunori Igasaki,Yuji Kobayashi +8 more
TL;DR: In this article, a liquid-crystal-on-silicon (LCOS) spatial light modulator (SLM) for phase-only modulation was developed. But the backplane of the SLM was mechanically weak and its surface was not flat.
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Dynamic holography using pixelated light modulators
TL;DR: An overview on the technical background of dynamic holography focusing on pixelated spatial light modulators and their technical restrictions is given, and a selection of the numerous applications of dynamic HoloLens is presented.
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Measurement of Freeform Optical Surfaces: Trade‐Off between Accuracy and Dynamic Range
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A low-cost spatial light modulator for use in undergraduate and graduate optics labs
TL;DR: In this article, the authors describe a simple method for creating a low-cost SLM by extracting components from a commercial LCD projector, and demonstrate the pedagogical applications of this SLM design by providing examples of its use in teaching diffraction and interference phenomena.
References
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Journal ArticleDOI
Computer Generated Holograms for Testing Optical Elements
Alan J. MacGovern,J. C. Wyant +1 more
TL;DR: The application of computer generated holograms to the interferometric testing of aspheric optical elements has been investigated, and it has been shown that they provide a convenient and practical method of producing an asPheric reference wavefront.
Journal ArticleDOI
Determination of the physical properties of an arbitrary twisted-nematic liquid crystal cell
Colin Soutar,Kanghua Lu +1 more
TL;DR: In this paper, an experimental procedure for the determination of the physical properties of an arbitrary twisted-nematic liquid crystal cell was presented, and the results showed that there is significant variation in the birefringence across this cell and the influence that this has on the use of the cell in optical processing systems.
Journal ArticleDOI
Kinoform using an electrically controlled birefringent liquid-crystal spatial light modulator
Jun Amako,Tomio Sonehara +1 more
TL;DR: A programmable kinoform using an electrically controlled birefringent liquid-crystal spatial modulator (ECB-LCSLM) and the structure of the LCSLM is discussed, comparing the computed results and optical reconstructions.
Journal ArticleDOI
Encoding amplitude and phase information onto a binary phase-only spatial light modulator.
TL;DR: This work reports what to their knowledge is a new technique for encoding both amplitude and phase information onto a single binary-valued spatial light modulator, effectively allowing amplitude modulation of either the first-order or zero-order diffracted light.
Journal ArticleDOI
Transmission and phase measurement for polarization eigenvectors in twisted-nematic liquid crystal spatial light modulators
TL;DR: In this article, the authors presented theoretical expressions for the eigenvalues and eigenvectors for a twisted-nematic liquid crystal spatial light modulator (LCSLM) as a function of the twist angle and birefringence using the Jones matrix formalism.