Other

Computed Anatomy Incorporated

Lars Tibbling

Roy Maus

Martin Gersten

Compact keratoscope with interchangeable cones

An improved conical keratometer wherein the parent image of the pattern to be reflected upon a target positioned adjacent to the illuminated bore is recorded on a film slide retained within the keratometer bore. Opposite edges of the slide are chamfered at equal but opposite angles so that, when the spindeled slide is released, the chamfered edges will meet along a line of contact rather than butting squarely together. The film slide is rolled so that the emulsion side is toward the periphery of the cone bore and the chamfering allows that side to lie smoothly against the cone bore without any gaps so that an undistorted image may reliably be reflected upon a standard target.

Keratometer device having photographically produced bore pattern

A cylindrical keratoscope is provided with an improved structure for illuminating the rings disposed along the length of its bore by having the light-transmitting rings defined as the lands between a series of opaquely coated, incised circular grooves in the bore. A circular, fluorescent, light tube is disposed in an aluminum light box having a semi-toroidal concavity provided with a light-reflecting surface to direct or collimate the light from the tube toward the light-receiving base of the device.

Illuminated ring device

A keratoscopic instrument capable of automatically compensating for the different optical characteristics exhibited by any of a set of mechanically interchangeable illuminated ring devices without manual recalibration includes on the base portion of each light ring device a plurality of distinctive, light pervious, machine-readable indicator spots illuminated from the keratoscope light source and arranged in a code indicative of the optical characteristics of the ring device in place. Marking information is detected and communicated to a computer controlled image processing system wherein the detected information is automatically utilized, in conjunction with other input data, to process the image.

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New York, NY, United States of America

Lars Tibbling