Abstract: The location in a wellbore of the top of a quantity of fill material which is sufficient to restrict flow in a tubing/casing annulus at a location deep in a well is determined by dropping a radioactive source through the annulus so that it falls to the top of the fill material. The depth of the thus deposited radioactive source is detected by radiation measurements, and the measured depth infers the location of the top of the fill material.

Abstract: The present invention is a composite material containing a mix of dosimeter material powder and a polymer powder wherein the polymer is transparent to the photon emission of the dosimeter material powder. By mixing dosimeter material powder with polymer powder, less dosimeter material is needed compared to a monolithic dosimeter material chip. Interrogation is done with excitation by visible light.

Abstract: A method and apparatus for detecting fluorescence from sunlit plants is based on spectral line discrimination using the A-band and B-band absorption of atmospheric oxygen. Light from a plant including scattered sunlight and the fluorescence from chlorophyll is passed through a chopper into a cell containing low-pressure, high-purity oxygen. A-band or B-band wavelengths present in the light are absorbed by the oxygen in the cell. When the chopper is closed, the absorbed light is remitted as fluorescence into a detector. The intensity of the fluorescence from the oxygen is proportional to the intensity of fluorescence from the plant.

Abstract: The present invention is a composite material containing a mix of dosimeter material powder and a polymer powder wherein the polymer is transparent to the photon emission of the dosimeter material powder. By mixing dosimeter material powder with polymer powder, less dosimeter material is needed compared to a monolithic dosimeter material chip. Interrogation is done with excitation by visible light.

Abstract: A container for a self-reading pocket dosimeter includes a transparent tube for receiving the self-reading pocket dosimeter, a light source mounted at one end of the transparent tube, and an eyepiece mounted on an opposite end of the transparent tube for viewing a read-out of the self-reading pocket dosimeter. The container may further include an activation device for selectively supplying power to the light source. The container both protects the dosimeter from being contaminated and provides a light source for viewing the dosimeter.

Abstract: An infrared array sensor system capable of sensing the position and orientation of a human body without using any expensive sensor elements required in conventional infrared array sensors and having functions enabling it to an air conditioner by a relatively simple construction. The infrared array sensor system includes a Fresnel lens for focusing infrared rays, a plurality of guides for guiding the infrared rays focused by the Fresnel lens in predetermined directions, a filter for filtering desired wavelength band ones of the guided infrared rays, a plurality of infrared sensor elements for sensing the filtered infrared rays, the infrared sensor elements corresponding to the directions of the infrared rays guided by the guides, respectively, and a circuit device for processing signals respectively outputted from the infrared sensor elements.

Abstract: An object of the invention is to provide a pyroelectric type infrared sensor without external lens, made in a compact size, and having an improved sensibility. A pyroelectric element for detecting infrared rays is provided in a sealed tube (sealed body) having an opening, at said opening is provided an incident infrared ray filter. A diffraction optical lens (diffraction optical element) for focusing or imaging infrared rays is provided on the front or back surface of said incident infrared ray filter.

Abstract: An infrared scanner and stand assembly including a tripod, a scanner holder connected to the head of the tripod by a ball and socket joint to hold an infrared scanner for permitting the infrared scanner to be adjusted horizontally as well as vertically through a 360 degree angle, the scanner holder having two levels mounted on the same plane at right angles for verifying horizontality.

Abstract: A heat source detector includes an infrared sensor 1 wherein plural infrared ray sensing elements 7 on which an infrared image is formed by an infrared lens 10 are arranged into an array form; and an infrared analyzer 2 which analyzes a detection signal detected by the infrared ray sensing elements 7. The infrared analyzer 2 has: an infrared intensity detecting unit 3 which detects the infrared intensity for each of the infrared ray sensing elements 7; an infrared center of gravity detecting unit 5 which obtains the center of gravity of a heat source emitting infrared rays, from the infrared intensities detected by the infrared intensity detecting unit 3, and a heat source moving direction detecting unit 6 which obtains the moving direction of the heat source, from temporal vector displacement of the center of gravity obtained by the infrared center of gravity detecting unit 5.

Abstract: A system for infrared sensing has thermally sensitive picture elements within a substrate; bias contact areas within the substrate and around a periphery of the thermally sensitive picture elements; a common electrode on a front side of the thermally sensitive picture elements and the bias contact areas; an optical coating on top of the common electrode; a first electrical contact metal on a backside of the thermally sensitive picture elements; and a second electrical contact metal connected to the bias contact areas on a backside of the bias contact areas and electrically connected to the common electrode. The bias contact areas may include a conductive substrate area. In addition, the device may be connected to an integrated circuit by an ohmic connection to the first and/or the second electrical contact metal.

Abstract: A system and method for performing a rapid, automatic, quantitative assessment of the image quality of a radiographic image is disclosed. The present invention utilizes a stepped calibration target made of differentially attenuating disks that is exposed to a beam of radiation simultaneously with the exposure of an object of examination. The recording medium is developed, if necessary, and the image of at least the calibration target is read, as with a laser scanner or a CCD. The optical density characteristics of the image of the calibration target are then analyzed with respect to reference optical density criteria associated with the type of recording medium used and indicative of an optimal signal pattern. If the optical density characteristics of the calibration target image meet the reference criteria, then an indication is made to show that the radiographic image has been approved as meeting the quality assurance threshold.

Abstract: An image capture panel includes a plurality of sensors arrayed adjacent to a substrate layer of dielectric material, and a radiation sensitive layer disposed over the sensors. The radiation sensitive layer is exposed to a first substantially uniform pattern of light radiation for partially neutralizing residual electrical charges trapped within the image capture panel. The radiation sensitive layer is then exposed to a second substantially uniform pattern of light radiation sufficient to neutralize substantially all residual electrical charges trapped within the image capture panel.

Abstract: A system (10) for focusing an array (12) of detectors. The invention (10) includes a target (16) disposed in the line-of-sight of the array (12). In accordance with the invention, the target (16) has a plurality of elongate apertures therein. The target (16) is mounted about the line-of-sight of the array relative to an axis extending through the plane of the input aperture of the array and transverse to the line of sight. The array (12) is sampled to provide a plurality of output signals. The output signals have amplitude minima and maxima corresponding to the detection of the apertures by individual detectors in the array (12). The maxima of the output signals are used to focus the array (12).

Abstract: An X-ray image sensor with electronic, planar image converters covers a relatively large area without the occurrence of image gaps. A number of image converters adjoin one another in a surface, these being coupled to a scintillator via fiber optics. At least a part of the fiber optics proceeds at an angle deviating from 90.degree. relative to the image converters, such that the fiber optics adjoin one another at the scintillator but leave an area free at the image converters. This area is at the junction of two image converters that adjoin one another, and is thus an optically inactive region.

Abstract: An automated test system and method for infrared focal plane detector arr which utilize X-Y positioning of a focused laser spot scanning individual detector array elements Detector element outputs are processed for the entire focal plane array resulting in crosstalk measurement.

Abstract: An apparatus for characterizing an analysis method based on fluorescent crack detection. The surface defects in articles to be checked are revealed by using a visible radiation around an excitation wavelength. The apparatus includes an illumination device, a camera and an image processor. The illumination device includes an ultraviolet light source, a monochromator and a light guide to focus the ultraviolet radiation.

Abstract: An infrared detector includes an outer cylinder having an infrared permeable window and an inner cylinder accommodated in the outer cylinder. The inner cylinder has an end surface, a cylindrical side surface, and an annular tapering surface formed between the end surface and the cylindrical side surface. The annular tapering surface has a diameter continuously decreasing toward the end surface. A multiple element type infrared sensor is mounted on the end surface of the inner cylinder, the infrared sensor having a plurality of output electrodes. A cryogenic cooling arrangement is provided for cooling the infrared sensor to low temperatures, and a signal fetching arrangement is provided for carrying a signal detected by the infrared sensor, the signal fetching arrangement including wiring patterns formed on the end surface, the tapering surface and the cylindrical side surface of the inner cylinder.

Abstract: A hand-held probe system for imaging is described which includes a hand-held probe and a detector assembly connected by a fiber optic cable. The probe includes a hand-portable housing, a detector assembly within the housing and an IR sensor placed on the cold finger of the detector assembly. The probe can include an optical system at a known distance from the sensor and a spacing tube defining the distance between the body and the optical system. The spacing tube ensures that the body whose thermal image is being read is always at, or is very close to, the object plane of the probe. The spacing tube is typically formed of a material having minimal thermal deformation which can minimize stray IR radiation.

Abstract: A continuous sample detector includes a sample chamber, a cell body and one or more standard sources of radiation. Mounted in the sample chamber, the cell body has a cell, a coil of transparent tubing through which the sample solution continuously passes during the measurement. The standard source of radiation is mounted adjacent to the cell body. The detector also includes a sensor mounted and arranged proximate the cell and the standard source to encounter relative reciprocation for allowing the sensor to alternately sense radiation of the cell and the standard source. The detector is operated by connecting sample lines to the cell body. The sensor and cell are then positioned to detect radiation from the cell with the sensor, while a sample flow is pumped through the cell. The system is calibrated by disposing the sensor and the standard source to detect radiation from the standard source with the sensor, without disconnecting the sample lines from the cell body.

Abstract: A resonant, photoconductive detector for infrared radiation in which a reduced-volume pattern of the photoconductor permits impedance-matching to free space. The photoconductor pattern is a split-ring pattern, typically made of HgCdTe, which is virtually cylindrically symmetric, yielding a non-polarization-sensitive response. The region below the patterned photoconductor is a quarter-wavelength resonant cavity type structure. The ohmic contacts are conductively distanced from one another by use of the split-ring pattern. Spacing dimensions are slightly less than a wavelength for the infrared wavelengths to be absorbed; but ring-width dimensions of the photoconductor are substantially less to effect the volume reduction and the corresponding detectivity and radiation-hardness improvements. The essentially cylindrical isotropic pattern eases fabrication by averaging etching nonuniformities.