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Stereo line scanner

  • US 4,234,241 A
  • Filed: 07/23/1979
  • Issued: 11/18/1980
  • Est. Priority Date: 08/02/1978
  • Status: Expired due to Term
First Claim
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1. A stereo line scanner for optical radiation reception and recording to enable provision of stereoscopic picture-like representation of remote objects from a moving instrument carrier, comprising in combination:

  • a rotary plane mirror provided with means for causing it to revolve about an axis at an angle of substantially 45°

    to its mirror plane,a second plane mirror in the vicinity of the periphery of said rotary mirror and having an elongated mirror surface of which the long dimension is oriented at right angles to the axis of revolution of said rotary mirror and of which the short dimension is oriented at an angle between 0° and

    45°

    to said axis of said rotary mirror,a radiation detector located on said axis of said rotary mirror for registering radiation received by the scanner and directed toward said detector by reflection from said rotary mirror, andan optical system for collecting radiation reflected from said rotary mirror in a direction parallel to said axis of rotation thereof so as to provide said collected radiation to said detector,the inclination of said second plane mirror to said axis of rotation of said rotary mirror and also the inclination of said axis to the direction of movement of said instrument carrier being such, that during one portion of a revolution of said rotary mirror, radiation is receivable from objects disposed on the opposite side of said axis from said second mirror in a beam of primary rays reflected directly by said rotary mirror toward said optical collecting system and during another portion of said revolution of said rotary mirror, radiation is receivable from objects so disposed in a beam of secondary rays reflected first by said second plane mirror and then again by said rotary mirror to proceed toward said optical collecting system and said detector, whereby a line scan of said secondary rays can be correlated with a line scan of said primary rays from the same objects, but taking place after an interval determined by the movement of said carrier past said objects, to provide stereoscopic data regarding the aspect and disposition of said objects.

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