Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

1993-12-20

1994-11-01

Gellner, Michael L.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

2502014, 2502016, G03B 700, G01J 120

Patent

active

053611187

ABSTRACT:
A distance measuring apparatus includes a light projecting device for projecting a light toward an object, a first light receiving device for receiving reflected light from the object; a second light receiving device for receiving light which is reflected by glass positioned between the distance measuring apparatus and the object; a distance calculator device for evaluating an output from the first light receiving device to calculate a distance to the object; and a distance information evaluator device for detecting a presence of glass based on an output from the second light receiving device, and for setting predetermined distance information, irrespective of the distance to the object calculated by the distance calculator device, when the presence of glass is detected.

REFERENCES:
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patent: 4752799 (1988-06-01), Stauffer
patent: 4767934 (1988-08-01), Stauffer
patent: 4831404 (1989-05-01), Fujita et al.
patent: 4933702 (1990-06-01), Komatsuzaki et al.
patent: 4947202 (1990-08-01), Kitajima et al.
patent: 5006700 (1991-04-01), Kosaka et al.
patent: 5051766 (1991-09-01), Nonaka et al.
patent: 5128529 (1992-07-01), Nagaoka et al.

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