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Solid-state-optical-position-determining-apparatus

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Solid-state optical position determining apparatus

Details

Inventors: Griffin, James L.;
Assignee: Wells-Gardner Electronics Corporation (Chicago, IL)
Primary Examiner: Evans; F. L.
Assistant Examiner:
Attorney, Agent or Firm: McDermott, Will & Emery

An optical position determining apparatus for detecting radiant energy reflected from a target zone includes an emission device for generation and emission of radiant energy, a device for redirecting radiant energy across the target zone, a reflecting device for reflecting the radiant energy back from the target zone, and a detector device for sensing the presence of radiant energy reflected from the target zone. The emission device is stationary and emits a beam of radiant energy toward the redirecting device, which redirects the radiant energy along a primary beam path. The redirecting device also is configured for permitting a return beam of light from the target zone to impinge upon the detector device, which is located therebehind with respect to the direction of travel of the return beam. The detector device includes a CCD (charge coupled device) linear sensor formed of a plurality of sensor elements. The sensor elements are pulsed in successive order for scanning the target zone for the presence of the reflected radiant energy and for producing an electrical signal in response to the presence of such reflected radiant energy.

DETAILED DESCRIPTION Accordingly, it is a general object of the present invention to provide an improved optical position determining apparatus which is relatively simple and economical to manufacture and assemble, but yet overcomes the disadvantages of the prior art location apparatuses.
It is an object of the present invention to provide an optical position determining apparatus which is formed completely of solid-state components and has a high degree of resistance to vibrations.
It is another object of the present invention to provide an efficient, low-cost and accurate optical position determining apparatus requiring a minimal number of components, which is substantially compact and lightweight.
It is still another object of the present invention to provide an optical position determining apparatus which includes a detector device formed of a CCD linear image sensor having a plurality of sensor elements.
It is yet still another object of the present invention to provide an optical position determining apparatus which includes a CCD linear image sensor for producing an electrical signal in response to the presence of reflected radiant energy and a microprocessor responsive to the electrical signal for calculating the vertical and horizontal coordinates of an obstruction located within the target zone.
It is yet still another object of the present invention to provide an optical position determining apparatus which includes a light-redirecting device formed of a split mirror having a first portion and a second portion spaced apart from the first portion and forming a gap therebetween.
It is yet still a further object of the present invention to provide an optical position determining apparatus which includes a light-redirecting device formed of a single-piece mirror.
In accordance with these aims and objectives, the present invention is concerned with the provision of an optical position determining apparatus for detecting radiant energy reflected from a target zone which includes an emission device for generation and emission of radiant energy, a light-redirecting device for redirecting the radiant energy across the target zone, a reflecting device for reflecting the radiant energy back from the target zone, and a detector device for sensing the presence of radiant energy reflected from the target zone

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