39 results about "Optical data processing" patented technology

A light control and display technology applicable to light redirection and projection with the capacity, in a number of embodiments modified for particular applications, to produce managed light, including advanced images. Applications include miniature to very large scale video displays, optical data processing, 3-dimensional imaging, and lens-less vision enhancement for poor night-driving vision, cataracts and macular degeneration.

An optical pickup is disclosed that includes a simplified phase correction element enabling sufficient correction of spherical aberration and realization of compatibility with blue-light, DVD-type and CD-type optical recording media with a two-stage numerical aperture switching operation. The phase correction element includes a phase shifting part and a diffraction part superposed on the phase shifting part. The phase shifting part has stepwise concentric circular regions including more than two stages. The diffraction part includes periodically arranged projecting and depressed portions formed on the phase shifting part. The phase shifting part suppresses spherical aberration related to red light used for a DVD-type optical recording medium when the object lens is optimized relative to blue light used for a blue-light optical recording medium. The diffraction part sets a most appropriate NA to each of the blue-light, DVD-type and the CD-type optical recording media by switching the numerical aperture.

A optical data processing apparatus included a light source, an optical system that concentrates light from the light source to an optical data storage medium, and a mechanism that scans the concentrated laser light on the optical data storage medium, the light source includes at least one Vertical-Cavity Surface-Emitting Laser (VCSEL) device that emits laser light, the at least one VCSEL device included an active region and a current-confined portion between first and second mirrors that form a vertical resonator structure, and an opening having a diameter equal to or larger than about 4 micrometers is formed in the current-confined portion for applying current.

A new light modulating material using unidirectionally oriented micro-domains of liquid crystal separated by polymer chains is provided. Liquid crystal/polymer films are produced by a one step production process involving a photopolymerizable monomer mixed with a liquid crystal then exposed to UV light. In one embodiment, force deformations are applied to the films resulting in diffraction efficiencies of more than 95%. In another embodiment, applying a planar force to a thick film that produced a 2 μm shift of phase retardation in several hundred microseconds when an appropriate field is applied. Use of this invention provides fast response time and a low required driving voltage. The new cell can be used as spatial light modulators for manufacturing information displays, electro-optical devices, telecommunications system, optical data processing, adaptive optics applications, color projection displays and switchable micro-lens optics.

An optical pickup including a light source, two light focus devices, a light reception device, a polarization selective light path splitting device, a polarization switching device, a first diffraction element including a periodic structure including two kinds of sub-wavelength convexo-concave structures while the two kinds of sub-wavelength convexo-concave structures alternately arranged at right angles to each other, and the filling factors of the two kinds of sub-wavelength convexo-concave structures are determined to substantially equalize effective refractive indices of the two kinds of sub-wavelength convexo-concave structures with regard to the polarization direction of the outgoing light beam, and the second diffraction element having a structure similar to that of the first diffraction element except that the filling factors are determined to substantially equalize effective refractive indices of the two kinds of sub-wavelength convexo-concave structures with regard to a polarization direction perpendicular to the polarization direction of the outgoing light beam.

An optical data processing apparatus reads and/or writes data from/on a data storage medium, in which first and second data storage layer are stacked, by radiating light from the second layer. The processor includes: a light detector including at least one photodetector for generating a light quantity signal; a detecting optical system for guiding first and second reflected light beams from the first and second layers to the light detector; and a signal processor for generating a layer sensing signal from the light quantity signal and determining, by the layer sensing signal, whether the focal spot is now located near the first layer or the second layer. The detecting optical system includes an optical element that produces astigmatism to the first and second reflected beams. The light detector includes, as the at least one photodetector, a layer sensing photodetector arranged so as to include respective areas of the light detector where the second reflected beam is incident when the focal spot is located near the first layer and where the first reflected beam is incident when the focal spot is located near the second layer.

The invention discloses laser radar on the basis of an optical fiber mode field adapter. The laser radar has the advantages that the optical fiber mode field adapter is used in a telescope of the laser radar, an input end of the optical fiber mode field adapter is a large-mode-field optical fiber end, the large-mode-field optical fiber end is connected with an output end of an optical receiving and transmitting module and is used for receiving atmospheric echo signals, an output end of the optical fiber mode field adapter is a small-mode-field optical fiber end, the small-mode-field optical fiber end is connected with an optical receiver and is favorable for optical filtering and optical signal extraction, and accordingly the cost of the laser radar can be reduced; the problem of contradiction between received signal view field angles and optical data processing of existing laser radar can be ingeniously solved by the aid of the optical fiber mode field adapter, view field angles can be expanded while the echo signal coupling efficiency is guaranteed, the performance of the laser radar can be improved, the requirements of the optical receiver and photoelectric detectors on small mode fields can be met, follow-up data processing difficulty can be lowered, the integral performance of the laser radar can be improved, and the application range of the laser radar can be expanded.

An optical pickup including a light source, a light focus device, a diffraction element, an optical split element, a ¼ wavelength board, a light reception device and a correction element wherein the correction element is divided into multiple areas in a surface vertical to an optical axis, each area of the multiple areas has a sub-wavelength convexo-concave structure having a pitch equal to or shorter than a wavelength of the outgoing light beam and the sub-wavelength convexo-concave structures of the multiple areas adjacent to each other have groove directions perpendicular to each other, and the filling factors of adjacent areas of the multiple areas are determined to substantially equalize effective refractive indices with regard to the polarization direction of the outgoing beam emitted from the light source and impart a phase difference of π with regard to a polarization direction perpendicular to the polarization direction of the outgoing beam.

The present invention relates to an optical system and control method thereof. The optical system of the invention includes: a plurality of light sources, an optical multiplexer, wherein the optical multiplexer has a plurality of light receive sections receiving the light outputting from the light source, an optical guide part for changing the optical direction of one light receive section from a plurality of light receive sections and guiding to the optical guide part of the light output part; an optical splitter, used for splitting the light from the optical multiplexer and outputting the optical splitting information; an optical data processing part, used for decoding the optical splitting information outputted from the optical splitter and processing. Thereby, an optical multiplexer is provided to select one light from multiterm lights and also a system with simple apparatus and low cost.

A detecting device for detecting liquid or colloid, comprising: a light emitting device, configured to emit first light, wherein a first angle between a first emitting direction of the first light and a surface when the detecting device is located on the surface, wherein the first angle is larger than 0° and smaller than 90°; an optical sensor, configured to detect first optical data generated based on the first light; and a processing circuit, configured to determine if the liquid or the colloid exists in a predetermined range of the detecting device based on the first optical data. An automatic cleaner applying the detecting device is also disclosed.