Abstract:
Various embodiments include systems and methods to provide selectable variable gain to signals in measurements using incident radiation. The selectable variable gain may be used to normalize signals modulated in measurements using incident radiation. The selectable variable gain may be attained using a number of different techniques or various combinations of these techniques. These techniques may include modulating a modulator having modulating elements in which at least one modulating element acts on incident radiation differently from another modulating element of the modulator, modulating the use of electronic components in electronic circuitry of a detector, modulating a source of radiation or combinations thereof. Additional apparatus, systems, and methods are disclosed.
Abstract:
A focus detecting system is provided for detecting the focus condition of a moving image in an optical system. The focus detecting system includes means for detecting the sharpness of a plurality of sub-images formed along a plurality of sight lines by the optical system, the detecting means including a plurality of detectors arranged in a plane tilted with respect to an optical axis of said optical system and the detectors aligned with a direction of motion of the image formed by the optical system such that the sub-images are detected at a plurality of positions in the vicinity of best focus of the optical system. A time delay is provided between the sub-images such that the sub images represent the same portion of a scene being imaged by the optical system. A position of best focus for said optical system is calculated from the sub-image data.
Abstract:
A thermal detecting device for sensing temperature at multiple locations proximate to the detecting device is provided. The detecting device has a pair of infrared detectors each configured to measure temperature of two locations by receiving infrared energy of the two locations. A housing encloses the pair of infrared detectors. The housing is configured with an aperture to allow the infrared energy of the two locations to be received by the pair of infrared detectors. A reflective mirror or two mirrors focus the infrared energy of the two locations towards the pair of infrared detectors. The detecting device may be configured to determine if there is a temperature differential at a location as the housing moves with respect to the location.
Abstract:
An optical designator system employs a remote source of electromagnetic energy, such as a small hand-held infrared LED or the like, to generate an identifying beam which is directed to the same faceplate through which a displayed image is viewed. A diffuser medium is disposed at the image plane along the rear surface of the faceplate and scatters the incident beam of electromagnetic energy toward orthogonal pairs of photodetectors located adjacent to the edges of the faceplate. The output signals from the photodetectors are presented to a normalizer circuit which compensates for intensity variations of the source of electromagnetic energy into the faceplate. Therefore, the output signal from each normalizer circuit varies in a relationship which is proportional to the distance between the photodetectors at which the incident beam strikes the diffuser medium. The remote energy source is preferably modulated with a waveform which is discernible both from background ambient light and that of the displayed image. Optical and electrical filters associated with the photodetectors insure that normalizer circuits respond only to electromagnetic energy from the remote source.
Abstract:
Provided is a test apparatus that tests a device under test including an optical coupler transmitting optical signals in a direction perpendicular to a device surface. The test apparatus includes a substrate on which the device under test is to be loaded, an optical transmission path that transmits the optical signals, and a lens section facing the optical coupler on the substrate that focuses the optical signals from an end of either the optical coupler or the optical transmission path to an end of the other.
Abstract:
In the disclosed distance measuring device a light source projects a light on an object to be photographed and at least two photo-electric converters each with several light receiving areas receive light reflected by the object. The quantity of electric charge on these areas varies with the quantity of light incident thereon. An electric charge storage stores the electric charges produced at the two converters and a control determines the operation of the light receiving areas of the photo-electric converters according to the electric charge information produced.