The optical scanner is designed with a system of torquing coils symmetrically distributed over the rear face of the scanning mirror about the mirror's pivot axis. Each torquer coil is disposed within air gaps of an array of permanent magnets so that current pulses in each of the coils produce a push-pull torque impulse on the mirror. The torquer structure is designed for optimal distribution of torquing impulse over the mirror surface to maximize the torquing effect and to minimize the effect of...

This optical scanner contains a rotor having a plurality of lenses arranged in a helix coaxial with the rotor and having a single convolution. A light source is positioned to emit light appearing to come from the rotor axis. Each lens in turn projects an image of said light source to a record, lighting a narrow area thereof. This lighted area scans a character line of the record as the rotor turns. The axially displaced lenses successively scan different lines of characters without any motion ad...

A hand held optical reader and apparatus for reading an octal digital code which contains a data digit field, an error checking count field and a parity field. The reader is designed for self-positioning over a code bearing label and the apparatus comprises simple logical circuitry to insure the correct reading of the optical code.

To maintain the intensity of a beam of light applied to an absorbance cell constant in an optical system for measuring the light absorbance of a fluid within the absorbance cell, a light radiating member receives light from a primary light source and re-radiates the light with proportional intensities to one or more absorbance cells and to a photoresistive element of a light-intensity monitor, with the photoresistive element generating a signal representing changes in the intensity of light. Thi...

An optical filter for use in a field-sequential colour television camera, for which purpose it is rotatably arranged in front of a light-integrating camera tube. The filter partly comprises sections which produce a reduction in definition and for this purpose are provided with a plurality of diffraction gratings having different spacings. The optical filter which owing to the provision of the diffraction gratings has a discontinuous light transmission characteristic, after integration of the lig...

A miniature device including a light source, a suspended mass, and a photll system is employed as an optical accelerometer which serves as a transducer to provide an electrical signal proportional to the magnitude of acceleration and converts inertial forces into an electrical signal.

An improved optical encoder utilizing a U-type scan of the optically readable code pattern bands which contain an altitude reporting code pattern thereon wherein means are provided for selectively illuminating a pair of light sources which lead and lag, respectively, the transition point for the respective code pattern so as to alternately illuminate the band to provide the U-type scan of the band. Photo sensors are located on the opposite side of the code pattern disc from the light sources in ...

An optical information recognition system for sensing information carried on an information carrying member having an information carrying surface exhibiting a normal surface level and having information carried thereon as raised surface areas. The reader includes light transmitting means, such as an array of fiber optic tubes, for transmitting light along a given acute angle of incidence relative to the member so as to illuminate a portion thereof. Light receiving means, such as an array of fib...

The present invention relates to a device to generate, starting from a stationary slit, an image of this slit which scans in its transverse direction, comprising a light source arranged in such a way in front of this slit, that the principal rays through the slit are parallel to the optical axis of the device, and a straight, equilateral, transmitting polygonal cylinder located behind the slit which is arranged so as to rotate about its axis of symmetry parallel to the longitudinal direction of ...

A dilatometer for measuring the linear coefficient of expansion of a specimen block wrung on a platen. The measurement is made by electronically comparing a set of fringes that are responsive to motion of the sample to a set of fringes that are responsive to motion of the platen. Each set of fringes is generated by interference between a reference light beam and a light beam which has twice traversed the distance to the surface whose motion is being monitored, the two traversals being along sepa...