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Optical Range Finder

IP.com Disclosure Number: IPCOM000095696D
Original Publication Date: 1964-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Kern, R: AUTHOR [+2]

Abstract

The apparatus is a combination stadiameter and inverse stellar interferometer providing short and long range determination capabilities, respectively.

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Optical Range Finder

The apparatus is a combination stadiameter and inverse stellar interferometer providing short and long range determination capabilities, respectively.

Incoming light from an object 10, the range of which it is desired to determine, strikes the reflective surfaces of a pair of mirrors M1 and M2. The light is again reflected from mirrors M3 and M4 to pass through a pair of apertures 11 and 12 of mask 13 and then through the outermost edges of objective lens 14 for projection onto image plane 15. The interference pattern displayed at plane 15 serves to provide an exceptionally precise measurement of the angles subtended at the apparatus by object 10. If the size of the object is known, the range is immediately calculable. Measurements of range from approximately 15 to 300 miles for objects having sizes of but a few feet in diameter are obtainable by this apparatus.

A leverage system, not shown, permits swinging mask 13 and the mirrors away from the incoming light beams so that split objective lens 14 can be operated as a stadiameter to make range measurements. Adjustment apparatus 16 acts to translate one-half of the objective lens along the direction of the incoming light beam.

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