Topic
Spatial light modulator
About: Spatial light modulator is a research topic. Over the lifetime, 9043 publications have been published within this topic receiving 130143 citations.
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TL;DR: In this article, a programmable liquid crystal light modulator is used to compress femtosecond laser pulses using an evolutionary algorithm, and the second harmonic light (SHG) signal is maximized by the algorithm.
Abstract: We report on computer controlled compression of femtosecond laser pulses using a programmable liquid crys- tal spatial light modulator which is feedback-controlled by an evolutionary algorithm. This algorithm generates the opti- mal laser field on the basis of feedback from the experiment by optimizing the laser pulse iteratively. Without knowledge of the (chirped) input pulses, the experimental signal (second harmonic light=SHG) is maximized by the algorithm, thus re- sulting in fully compressed pulses. This method only makes use of the experiment's response (SHG signal) on the formed pulses. No other parameters need to be considered. This ap- proach leads to many experimental applications in all fields of optics and ultrafast spectroscopy where particularly shaped pulses are advantageous.
342 citations
TL;DR: Computer-generated holography technique is a powerful technology suitable for a wide range of display types, including 2D, stereoscopic, autostereoscopic, volumetric, and true 3D imaging.
Abstract: Computer-generated holography technique is a powerful technology suitable for a wide range of display types, including 2D, stereoscopic, autostereoscopic, volumetric, and true 3D imaging. Computer-generated holography is an emerging technology, made possible by increasingly powerful computers, that avoids the interferometric recording step in conventional hologram formation. Instead, a computer calculates a holographic fringe pattern that it then uses to set the optical properties of a spatial light modulator, such as a liquid crystal microdisplay. The SLM then diffracts the readout light wave, in a manner similar to a standard hologram, to yield the desired optical wavefront. Although CGH-based display systems can be built today, their high cost makes them impractical for many applications.
342 citations
Patent•
02 Jul 1993TL;DR: In this article, a spatial light modulator is presented where a moveable electrode is disposed opposite a fixed electrode and is biased to roll in a preferred direction upon application of an electric field across the electrodes to produce a light valve or light shutter.
Abstract: A spatial light modulator formed of a moveable electrode which is disposed opposite a fixed electrode and is biased to roll in a preferred direction upon application of an electric field across the electrodes to produce a light valve or light shutter. In one embodiment, the moveable electrode is restrained at one end and coils about the fixed end in a preferential roll direction. The bias is achieved by inducing anisotropic stress or anisotropic stiffness.
340 citations
TL;DR: A nematic liquid-crystal spatial light modulator that can be used as a high-precision wave-front control device andWave-front shaping by the production and quantification of the first 15 significant Zernike terms is demonstrated.
Abstract: I describe a nematic liquid-crystal spatial light modulator that can be used as a high-precision wave-front control device. I present results showing the open-loop correction of wave-front aberrations and demonstrate wave-front shaping by the production and quantification of the first 15 significant Zernike terms.
337 citations
Patent•
10 Oct 1984TL;DR: In this article, a frame addressed spatial light modulator with pixels arranged along columns of charge transfer devices, and optical projection and processing systems using such modulators are disclosed, where pixels include electrostatically deflectable flaps supported by conducting posts with nodes gated to the charge transfer device.
Abstract: A frame addressed spatial light modulator with pixels arranged along columns of charge transfer devices, and optical projection and processing systems using such modulators are disclosed. The pixels include electrostatically deflectable flaps supported by conducting posts with nodes gated to the charge transfer device. Schlieren, dark field and reverse dark field optics are available.
336 citations