Abstract: A fiber optical measuring device for measuring dynamic movements between a boundary surface of an optical fiber and a boundary surface of a movement-sensing body. The optical fiber is adapted to transmit optical energy to and from the boundary surfaces and at least one of the boundary surfaces includes a photo-luminescent material, the optical energy reflected from the boundary surface of the body being dependent on the relative position between the two boundary surfaces.

Abstract: A method for scanning an original picture photoelectrically in a picture scanning and reproducing machine, comprising the step of simultaneously projecting images of each of the scanned picture elements of the original picture on a plurality of adjacent scanning lines on each of a plurality of photosensor arrays for producing respective color separation picture signals. Through a pickup lens the scanning light beam is spread to cover the picture images on a plurality of the scanning lines.

Abstract: A light beam scanning reticle having a grid pattern with transparent portions and opaque portions alternately arranged in a light beam deflection direction and having a variable period in a direction perpendicular to the deflection direction. The grid pattern is movable in the deflection direction, and irregularity in the speed of scanning a light spot on a scanning plane is corrected with a photo-electric signal which is provided through the grid pattern.

Abstract: A current is measured by making use of a rotation of polarization plane in a magnetic field, that is, a Faraday effect. A conductor under measurement is transversely inserted into a center opening of a Faraday effect glass which has at least two total reflection areas on a periphery thereof so that a light directed into the Faraday effect glass is circulated around the conductor and emitted externally. The light emitted from the Faraday effect glass is split into at least two light beams, which are converted to electric signals by photoelectric elements, and A.C. components contained in the electric signals are extracted and compared. The electric signals are corrected based on the comparison result.The present measuring apparatus and method attain high precision current measurement in a stable manner over an extended period.

Abstract: In a device for determining the angle of rotation of a rotating member by use of a perforated disk which corotates with the rotating member and intermittently interrupts a continuous beam of light directed at the perforations of the disk, an improvement comprises providing perforations of the disk which define light permeable and light impermeable areas such that a width of the light permeable areas is less than a width of the light impermeable areas, and a width of the light permeable areas is approximately the same as a width of an aperture at a light receiving station. A symmetrical output signal is obtainable so as to increase a resolution of the angle of rotation measurement.

Abstract: This invention is a two-dimensional pressure sensor which can be used to determine a pressure distribution across a two-dimensional object which comes in contact with the sensor. The sensor includes a light source, a matrix of light transmitting fiber endings which includes an alternate pattern of transmitting and receiving light fibers, a transmitting fiber sub-array located a distance from the matrix and composed of transmitting fibers, a receiving fiber sub-array located a distance from the matrix and composed of receiving fibers, a semi-transparent deformable medium located above the matrix, a retro-reflective material located on top of the deformable medium, a flexible membrane located adjacent said retro-reflective material and positioned to contact an object, and apparatus such as a photodetector array, for detecting light which is reflected by the retro-reflective material and transmitted to the receiving fiber sub-array.

Abstract: Baffles (34) in infrared telescope (10) extend circumferentially around tube (12) of the telescope. Each of the baffles (34) has a concave, rearwardly facing curved surface (36) and a frontwardly facing planar surface (38). Baffles (34) extend from the interior wall of tube (12) in an acute angle with the optical axis (20) of the telescope, relative to front end (14) of the tube (12). This acute angle becomes greater for the baffles (34) toward rear end (16) of the telescope (10). Incoming off axis rays (44) are reflected by the planar surface (38) of the baffles (34) against the curved surface (36) of a forward adjacent baffle (34) and are reflected back and forth between adjacent surfaces (38) and (36) a number of times before being reflected back as rays (46) out of the front end of the telescope (10). Other off axis rays (40) are directly reflected as rays (42) by the planar surfaces (38) of the baffles (34).

Abstract: An optical document scanning apparatus of high resolution employs diaphragms defined by a line array of spaced opaque areas which are located midway between an object plane and an image plane containing a line array of spaced light sensors. The object plane is illuminated from a light source located in the image plane parallel to said line array of light sensors. The distance between object and image planes is twice the distance from the lead edge of one light sensor to another and the opaque areas defining the diaphragms are located opposite the areas between light sensors to restrict exposure of the light sensors substantially only to light diffusely reflected from the object plane which is normal to the light sensors thereby to achieve high resolution.