Eocom Corporation

American Hoechst Corporation

Steven K Harbaugh

Frank R Mitchell

Richard E Amtower

Gary H Hoogerbrugge

Precision traveling optical table assembly having a rigid support framework and a rigid rectangular framework. The rigid rectangular framework is supported at three locations upon the rigid support framework. The rectangular framework includes a pair of spaced parallel rails. An optical table is provided. Carriages are mounted upon the pair of rails for longitudinal movement relative to the rails. The optical table is supported at only three locations from the carriages. A drive mechanism is connected between the carriages and the rectangular framework for causing relative movement between the optical table and the rectangular framework. At least one optical element is carried by the optical table.

Precision traveling optical table assembly

Optical scanning apparatus including a rotating pyramidal mirror scanning wheel with reflector segments for deflecting a laser beam into and away from a doublet mirror roof reflector associated with said scanning wheel. The scanning wheel introduces components of vertical and horizontal angular deviation into the beam, the vertical deviation component being cancelled by inversion through the roof reflector while the horizontal angular component is doubled upon the second reflection from the scanning wheel so that the output beam is vertically wobble-free and stable while the beam is scanned through the sum of the horizontal angular components introduced by the wheel. The scanner is employed to create a flying spot scan from a laser beam in photosensitive plate exposure apparatus, one form of which employs superimposed laser read and expose (write) beams of different frequencies which are simultaneously scanned without chromatic aberration, and subsequently separated to ready copy and to expose a photosensitive plate surface as in the production of printing plates.

Optical scanner and system for laser beam exposure of photo surfaces

Disclosed is an optical read-write system including a first laser scanner for linearly scanning an object and generating a digital signal for the line scan. The digital signal is stored in a buffer at a read clock rate which is correlated to the scan of the first laser scanner. The digital signal is read-out of the buffer at a write clock rate and is applied as a control signal for a second laser scanner which linearly scans an image plane to develop an image. The second scanner scans at the same scan rate and distance as the first scanner, and the size of the image compared to the object size is determined by the differential of the read clock rate and the write clock rate.

Optical read-write system with electronically variable image size

Gimballed coupling for use with a lead screw and nut assembly having a housing with the nut mounted in the housing and the nut threadedly engaging the lead screw. A transfer plate is provided. A thrust bearing assembly is carried by the transfer plate. First and second bearing members are provided which are disposed between the nut and the thrust bearing assembly. The first bearing member engages the housing and the second bearing member engages the thrust bearing. The first and second bearing members have cooperative spherical surfaces to permit the pivotal movement of the nut with respect to the transfer plate. Means is carried by the transfer plate and the housing for yieldably urging the housing towards the transfer plate. Additional means is provided for preventing rotation of the housing with respect to the transfer plate.

Gimballed coupling for lead screw and nut assembly

Disclosed is a facsimile system having a transmitter for optically scanning input copy to produce modulated electrical signals to be transmitted to a receiver. The receiver responsively controls output optical scanning to form output copy as a reproduction of the input copy. Signal processing in both the transmitter and receiver employs spatial coding. In the transmitter scanner, a spatially coded reference signal, generated by the scanning beam and a spatial mask, is employed. In the receiver scanner, a spatially coded reference signal, generated by the scanning beam and an identical spatial mask is employed also. Therefore, the transmitter and receiver scanners are spatially synchronized without the need for real-time synchronization.

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Anaheim, CA, United States of America

Steven K Harbaugh