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Remote control apparatus for an auto-focus camera

  • US 5,172,155 A
  • Filed: 01/14/1991
  • Issued: 12/15/1992
  • Est. Priority Date: 01/19/1990
  • Status: Expired due to Fees
First Claim
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1. A remote control apparatus for an autofocus camera comprising:

  • light emitting means for emitting a light beam to a field to be photographed;

    light receiving means for receiving a light beam and producing a pair of output signals reciprocally varying in conformity with a light receiving position on a light receiving surface of said light receiving means which is in a distance measurement area in a photographing picture frame, the ratio of said pair of output signals varying in response to the position of the light beam on the light receiving surface;

    means for effecting a calculation on the basis of the ratio of said pair of output signals and producing a light receiving position signal conforming to the distance of the field, for effecting a focusing operation;

    a transmitter for transmitting a light signal for remote control to said light receiving means; and

    means producing a control signal for starting a photographing operation on the basis of the sum of said pair of output signals when said light receiving means receives said light signal for remote control.

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