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.

Projection apparatus using spatial light modulator

Abstract: A digital projection apparatus ( 10 ) for projection of a multicolor image includes a magnifying relay lens assembly ( 28 ) as part of the light modulation assembly ( 38 ) for each component color. The relay lens assembly ( 28 ) increases the effective f/# of incident light to the dichroic combiner ( 26 ) used to combine modulated light of each color from each light modulation assembly ( 38 ) in order to form the multicolor image. The magnifying relay lens assembly ( 28 ) also provides a reduced working distance for the projection lens ( 32 ), allowing a lower-cost design and facilitating substitution of the projection lens ( 32 ) best suited for a display surface ( 40 ).

An autostereoscopic display

Abstract: An autostereoscopic display comprises a first light source 4 and a second light source 5, the radiation from which is focused by an optical arrangement 6, 8 on respective eyes of an observer in viewing zones 9 and 10. A spatial light modulator 7 modifies the radiation received by each eye such that each eye receives a respective first and second image of a stereoscopic image pair. The light sources may be of different wavelengths with the spatial light modulator comprising two sets of wavelength selective elements each set producing respective first and second images, or the light sources may be controlled in combination with the modulator 7 to produce respective frame sequential image pairs.

Active aberration correction for the writing of three-dimensional optical memory devices.

Abstract: We describe an active optical system that both measures and corrects the aberrations introduced when writing three-dimensional bit-oriented optical memory by a two-photon absorption process. The system uses a ferroelectric liquid-crystal spatial light modulator (FLCSLM) configured as an arbitrary wave-front generator that is reconfigurable at speeds as great as 2.5 kHz. A method of aberration measurement by the FLCSLM wave-front generator is described. The same device is also used to correct the induced aberrations by preshaping the wave fronts with the conjugate phase aberration as well as to scan the focal spot in three dimensions. Experimental results show the correction of both on- and off-axis aberrations, allowing the writing of data at depths as great as 1 mm inside a LiNbO3 crystal.

Imaging device of coherent light

Abstract: A coherent light imaging device adopts a coherent light source 1 to irradiate an all-phase spatial light modulator 2; the coherent light transmitted by the all-phase spatial light modulator 2 is propagated through an optical system 3; the optical system transmits an optical pupil 8 in front of a cornea 4; the coherent light goes through the cornea 4, an iris 5, a lens 6, and finally reaches a retina 7; the amplitude distribution pf the coherent optical fields on a plurality of imaging planes before and behind the retina 7 is modulated by the all-phase spatial light modulator 2. The coherent light imaging device enables two-dimensional or three-dimensional images to be directly imaged the retina and has a simple structure, which can be applied to virtual reality display, augmented reality display and fundus medical diagnosis.

Spatial light modulator apparatus and method

Abstract: A device for discriminately illuminating a sample (22) to be viewed with excitation light (70). For example, an image taken with a CCD (10) provides feedback which is used to modulate the output of an excitation light source (40), thereby allowing a sample (22) to be viewed within the optimal range of detection for the particular CCD device (10) being used, despite the potential of wide dynamic ranges of sample luminescence.