Lockheed Missiles & Space Company, Inc.

Spectra-Physics Gmbh

Howard E Morrow

George Gal

Henry W Jones

Alfred P Hildebrand

A large aperture microlens array assembly has at least two arrays of microlenses with individual unit cell trains optically interconnecting individual microlenses in one array with related individual microlenses in another array. In each unit cell train the light entering an entrance pupil of a microlens in one array is transmitted through the exit surface of a related microlens of the other array to provide a collimated output through the exit. One array may be moved with respect to the other array for scanning a field of regard.

Internally cooled large aperture microlens array with monolithically

An aircraft velocimeter comprises means for projecting three pairs of independently generated ribbon-shaped laser beams to a measurement volume located at a predetermined distance from the aircraft with a predetermined separation being maintained between the two ribbon-shaped laser beams of each pair at the measurement volume. The times of flight of atmospheric aerosol particles between the two ribbon-shaped laser beams of corresponding pairs of laser beams are measured as the aerosol particles pass through the measurement volume. From the predetermined distance between the two ribbon-shaped laser beams of each pair and the measured time of flight of an aerosol particle across that predetermined distance, a component of velocity of the aerosol particle relative to the aircraft is calculated for each pair of ribbon-shaped laser beams. From the three components of velocity corresponding to the three pairs of ribbon-shaped laser beams projected to the measurement volume, a vector measurement of the velocity of the aircraft relative to atmospheric particles in the surrounding atmosphere is obtained using an on-board computer programmed with a conventional algorithm.

Laser velocimeter

Method and apparatus for reading machine readable coded labels on merchandise at a check-out station. A window is associated with the check-out station, together with means for supporting merchandise for movement past the window. A laser source having an output beam focused at a plane slightly beyond the window produces multiple vertical beams V.sub.1, V.sub.2, V.sub.3 having predetermined angular divergence and a horizontal beam H. Scanning optics, including a mirror wheel having a plurality of mirrors thereon, provides a raster location and a sub-raster location. Relay optics accept and inject the horizontal beam into the raster location movement of the wheel causing the horizontal movement of the H scan line at the window. The vertical beams impinge upon the sub-raster location from which the relay optics accept and inject the beams V.sub.1, V.sub.2, V.sub.3 over to the raster location. The relay optics serve to transform the motion of the wheel at the sub-raster location into a vector cancelling the horizontal scanning component at the raster location while adding a resultant of the sub-raster scan into a point image with a purely angular scan component at the raster location. Gating means is provided for permitting only one of the beams V.sub.1, V.sub.2, V.sub.3, or H to pass through the system at a time. Retrodirective viewing means receives reflective light from the area of impingement of the beam on the label, the reflected light being converted into electric signals indicative of the strength of reflection.

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San Jose, CA, United States of America

Howard E Morrow