1982-07-14
1984-02-07
Gellner, Michael L.
G03B 310
Patent
active
044299680
ABSTRACT:
In the disclosed device, a motion control apparatus effects relative movement between a projection arrangement that projects radiation toward an object and a sensing arrangement that senses radiation reflected by the object, and a processor receives an electrical output from the sensing arrangement to produce an output related to the range of an object. An arrangement between the motion control and the processor relates the processing operation to the relative movement produced by the motion control. According to an embodiment, a first stepping motor displaces a light projecting element stepwise in response to driving pulses from a first circuit while a second circuit processes the output of the light sensing element in relation to the output of the first circuit. A third circuit produces drive pulses for a stepping motor, that drives a movable lens, on the basis of the output of the second circuit.
REFERENCES:
patent: 3442193 (1969-05-01), Pagel
Masunaga Makoto
Taka Hideo
Canon Kabushiki Kaisha
Gellner Michael L.
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