Gte Laboratories Incorporated

Gte Products Corporation

Robert C Kocher

Alfred Piorkow

J Thomas Smith

Kenneth W French

Kenneth H Shaner

Apparatus for automatically measuring aperture size of apertured material includes a means for supporting and transporting the apertured material and a light source providing a light beam directed for passage through the apertured material to a light detector and is characterized by a comparator mask of alternate light transparent and opaque sectors of a given dimension and means for overlaying the apertured material with the comparator mask to provide a given length of light transparent slot and responsive to signals representing light transmitted through the given length of slot for deriving a signal representing the width of the slots of the slotted material. Also, a process for automatically measuring aperture size includes the steps of overlaying the slotted material with the comparator mask and utilizing a signal from the light detector representing light transmission of the slots of a given length to derive a signal representative of the slot width.

Apparatus and process for automatically measuring aperture size of

Three scanners are disclosed; common to all is an argon ion laser. In the first two versions, light passes through a telescope, which is provided to expand and collimate the laser beam, through a servo-driven iris whose function is to adjust the length of the slit image to be formed by the optics. The beam enters a rotating cradle, passes through a cylindrical lens, and strikes a galvanometer-driven mirror. Rotating the galvanometer about its axis deflects the image of the laser beam on the main scanning mirror. A second lens images the galvanometer mirror onto the CRT panel. In the first version, the main scanning mirror is a flat reflector; in the second version, the scanning mirror is either a prism or a mirror set at 45 degrees to the incident laser beam. In both versions, a motor-driven optical rotator is between the galvanometer-driven mirror and the scanning mirror. Several important features include the servo-driven image rotator and the motor-driven iris. In the third version, the optical rotator has been replaced by a motor-driven rotating mount for the cylindrical lens. The servo-driven iris has been replaced by a simple aperture, preferably elliptical or rectangular-shaped mounted coaxially to the cylindrical lens. The second lens has been replaced by a pair of adjustable diverging-converging lens. The main scanning mirror is linkage driven by a D.C. motor rather than directly coupled to the motor shaft.

Laser scanner for photolithography of slotted mask color cathode ray

A beam splitting system for use with a welding laser and having means for distributively directing an incoming welding beam along a pair of output optical paths is disclosed whereby a single welding laser may weld either sequentially or simultaneously at a pair of spatially-separated weld sites. For sequential welding, a bimodal beam switch is provided for alternatively switching the weld beam between a pair of alternate optical paths. For simultaneously welding, the bimodal beam switch is replaced by a dielectric beam splitter which divides the beam into transmitted and reflected beams simultaneously propagated along the pair of output optical paths.

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Harvard, MA, United States of America

Robert C Kocher