An optical scanner with a thin waveguide medium on a substrate includes means to couple a wide collimated beam of radiation into one end of the medium. A periodic array of substantially parallel, spaced electrodes are associated with one major surface of the medium. At least a portion of their electrode lengths extend in a direction substantially parallel with the direction of radiation propagating through the medium. Supply means is provided to apply voltages in a pattern to the electrodes whic...

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 device and method in which neutral atoms or molecules are used to observe surfaces of samples and capable in particular of producing information from inhomogeneous samples where the forces and interactions are of strength characterized by moderate temperatures in the range of 100.degree.K to 500.degree.K. Molecules evaporating from the surface of a sample are shown selected by a pin-hole and detected and converted to an ion current by a surface ionizing detector. With relative scanning movemen...

A mechanical scanner comprising an endless belt having a plurality of electrically conductive strips embedded in the material of the belt for making contact with guiding rollers. The conductive strips have extensions embedded for connecting and carrying a magnetic head by the belt so as to enable the belt to transport the head and thereby cause the head to scan a surface of magnetizable material to record on the surface or to reproduce from such surface. One of the guiding rollers is coupled to ...

A template to aid in the rapid scanning of bar code labels associated with specific items of a material order list. In the booklet form of template, the front cover of the booklet is formed of a transparent material and includes two separate sheets between which bar code labels may be inserted. The front cover is caused to overlie a material order list which is located between the front and back covers. The material order list is removably positioned and may be marked by hand and positioned with...

A beam scanning electrode is mounted on a rotor and is movable repeatedly across a beam of high energy particles when the rotor is rotated. The scanning electrode is mounted within a beam tube having a conductive wall to which the scanning electrode is electrically connected, as by a wiping contactor. The impingement of the beam upon the scanning electrode causes the emission of secondary electrons which are gathered by a collector electrode, spaced from the scanning electrode and insulated from...

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...

A 90.degree. reflector scans a flat document to reflect an image of part of the document into a plane parallel to the document. Then a 180.degree. reflector reflects the image back toward a detection station. A transport made of a cable and pulleys moves the 180.degree. reflector at one-half the speed of the 90.degree. reflector so that the optical distance between the detection station and the document remains constant throughout the scan.

In certain optically transparent ferrimagnetic and ferromagnetic crystal plates wherein the easy axis of magnetization is normal to the plate, reversed cylindrical magnetic domains can be generated and maintained in a stable but mobile condition. Tracks defined by bands of magnetic material along which a magnetic gradient is generated can be employed to move the bubble domains while maintaining their optically accessible area substantially constant. Polarized light passing through the plate is p...

This optical scanner uses a rotor with lenses. The lens surfaces are special and made up of surface elements parallel to the rotor axis. Preferably the source of light is a laser emitting very nearly parallel light rays. The rays are directed through a narrow line-like area that may lie on the rotor axis, and that emits a narrow fixed light bundle. A rotor lens forms an image of said line-area on a record. The thus illuminated area moves along a character line of the record as the rotor turns. T...