Abstract:
A glare protecting device and a method of controlling thereof for protecting a worker's eyes from a light comprising: a temperature detector for generating a temperature detecting signal by detecting ambient temperature; a controller for generating a starting signal having a starting time in response to the temperature detecting signal, and for generating a temperature compensating signal corresponding to the temperature detecting signal; a driving means for generating a starting voltage in response to the temperature compensating signal, and for generating an initial driving signal having a starting voltage in response to the starting signal; and a glare protecting plate which is started corresponding to the initial driving signal.
Abstract:
The device for generating an electrical control according to a position of a light beam in relation to a separating line includes two photodetectors (14,24), one (14) of which is arranged for detecting light falling on one side of the separating line and another (24) of which is arranged for detecting light falling on another side of the separating line. The separating line is an edge (30) extending between two (1,1,1) crystallographic planes of a crystalline substrate and the (1,1,1) crystallographic planes reflect respective parts of the light beam to the respective photodetectors.
Abstract:
A method and apparatus for producing a scintillation-immune adaptive optics reconstructor is disclosed. The present invention includes a wavefront sensor (70) which determines illumination slope and amplitude of a number of subapertures (75). The slope and amplitude information is coupled to a slope weighting function (90), which weights the slopes of each subaperture (75) according to the amplitude of illumination of each subaperture. The present invention determines the variation in light amplitude received by the subapertures (75) and determines a slope of the light amplitude variation. The signal gain of the imaging system is then adjusted depending on the slope of the light amplitude variation, thereby yielding a closed-loop system that compensates for amplitude disturbances caused by scintillations in the images received by the imaging system (10).
Abstract:
A solar generator system includes a solar cell for photo-electrically converting sunlight, a multi-focus lens for condensing and converging the sunlight to the solar cell, and a secondary light-condenser which is formed into an inversed truncated conical shape with a portion adjacent to the lens being of a larger diameter, and which is disposed on the solar cell with a light-receiving face being opposed to the lens so as to introduce converged rays from the lens to the solar cell. The secondary light-condenser has a light-receiving surface which is formed into a cornet shape and includes a circular planar portion, and a slant portion which is formed into a tapered shape with the diameter thereof being larger as it goes away from the lens and which has a smaller-diameter end connected to an outer periphery of the planar portion.
Abstract:
A method for real-time, robust, stable closed-loop control of two phase correction devices to compensate for both amplitude and phase fluctuations induced by light passing through a turbulent medium. Two phase correction devices, in different conjugate planes, are controlled to minimize the difference in phase of the input beam corrupted by turbulence and an ideal reference beam.
Abstract:
Device for discrimination of electrical pulses output from at least one semiconductor radiation detector, comprising: at least one means (106a, 106b) of transforming pulses capable of increasing a value of a derivative of the pulse with respect to at least one parameter called the slope parameter, at least one integrator (108a, 108b) capable of establishing a “characterization” value for each transformed pulse, the said value being obtained by integration of the transformed pulse, pulse sort means (110) as a function of their characterization value.
Abstract:
An imaging system for measuring the field variance of distorted light waves collects a set of short exposure “distorted” images of an object, and applies a field variant data processing methodology in the digital domain, resulting in an image estimate which approaches the diffraction limited resolution of the underlying physical imaging system as if the distorting mechanism were not present. By explicitly quantifying and compensating for the field variance of the distorting media, arbitrarily wide fields can be imaged, well beyond the prior art limits imposed by isoplanatism. The preferred embodiment comprehensively eliminates the blurring effects of the atmosphere for ground based telescopes, removing a serious limitation that has plagued the use of telescopes since the time of Newton.
Abstract:
A system for processing signals from a radiation detector with semiconductors. A plurality of elementary detectors are placed side-by-side along a detection surface or a detection volume in which radiation referred to as incident radiation is capable of giving up its energy in at least one interaction. The device includes the supplying in response to each incident ray, an amount of energy corresponding to the sum of the energies given up during each interaction induced by the incident radiation. This device may be used in medical imaging.
Abstract:
A system for modulating light is disclosed. The system comprises a detector (102) that receives input radiation (101) and generates detector data (104) representative of the input radiation (101). An information processor (106) receives the detector data (104) and generates control data (108). A filter (110) associated with the detector (102) receives the control data (108) and filters the radiation input into the detector (102) in response to the control data (108). A system for light modulation is disclosed. The system comprises a sensor (114) that receives input radiation (101) and generates detector data (104) representative of the input radiation (101). An information processor (106) receives and processes the detector data (104) and generates control data (108). A filter (110) receives the control data (108) and filters the radiation in response to the control data (108). A method for modulating light is disclosed. Step one calls for detecting input radiation (101) with a detector (102) to obtain detector data (104). Step two requires processing the detector data (104) to generate control data (108). Step three provides for transmitting control data (108) to a filter (110). The last step calls for filtering radiation with the filter (110) in response to the control data (108).
Abstract:
Improvements in a focusing apparatus having an objective optical system for optically manufacturing a workpiece, forming a desired pattern on a surface of a workpiece or inspecting a pattern on a workpiece and used to adjust the state of focusing between the surface of the workpiece and the objective optical system. The focusing apparatus has a first detection system having a detection area at a first position located outside the field of the objective optical system, a second detection system having a detection area at a second position located outside the field of the objective optical system and spaced apart from the first position, and a third detection system having a detection area at a third position located outside the field of the objective optical system and spaced apart from each of the first and second positions. A calculator calculates a deviation between a first focus position and a target focus position and temporarily stores a second focus position at the time of detection made by the first detection system. A controller controls focusing on the surface of the workpiece on the basis of the calculated deviation, the stored second focus position and a third focus position when the area on the workpiece corresponding to the detection area of the first detection system is positioned in the field of the objective optical system by relative movement of the workpiece and the objective optical system.