Photographic camera

• US 4,273,430 A
• Filed: 07/10/1980
• Issued: 06/16/1981
• Est. Priority Date: 11/09/1977
• Status: Expired due to Term

• Current Assignee: Ernst Leitz Wetzlar GmbH (ACM Project Development Co.)
• Original Assignee: Ernst Leitz Wetzlar GmbH (ACM Project Development Co.)
• Inventors: Schaefer, Klaus-Dieter, Fritsche, Rainer
• Primary Examiner(s): Gellner, Michael L.
• Application Number:
  US06/167,370
• Time in Patent Office: 341 Days
• Field of Search: 354/22, 354/23 R, 354/25, 354/31, 354/60 R, 354/60 E, 356/28, 358/105
• US Class Current: 396/153
• CPC Class Codes: G03B 17/18 Signals indicating condition of a camera member or suitability of light indicating depth of field G03B13/30
• CPC Class Codes: G03B 7/091 Digital circuits
• CPC Class Codes: G03B 7/0993 in the camera
• CPC Class Codes: G03B 7/09979 Multi-zone light measuring

Abstract

A photographic camera with an electrical circuit for generating an electric signal proportional to the relative motion between the object sighted and the camera. The camera has a control circuit which receives the generated signal and provides an output signal which is fed to a display and/or control device. An indicator is provided to the user of the camera for indicating whether the exposure time is set too long for the relative motion present between the object and the camera. Automatic control of the camera is also provided. Individual photosensor elements are arranged in two alternately connected groups within the electrical circuit. The individual photosensor elements may also be arranged in two substantially perpendicular directions to provide a relative motion signal corresponding to two dimensional movement between the object to the photographed and the camera.

Claims

1. A photographic camera apparatus comprising:

circuit means including photosensor means for generating an electrical signal proportional to the degree of relative movement between an object to be photographed and said camera apparatus,

an imaging optical device having an image plane for imaging the object to be photographed,

means for generating a control signal in response to said relative movement electrical signal,

indicator means responsive to said control signal for indicating an unacceptable camera setting,

means mounting said photosensor means at least in the vicinity of the image plane of said imaging optical device,

said photosensor means comprising a plurality of individual photosensors arranged in two mutually perpendicular directions forming a photosensor matrix,

said circuit means comprising operational amplifier means having first and second inputs and an output connected to said means for generating,

means parallelly interconnecting alternate ones of said individual photosensors of said matrix forming thus a first and a second group generating first and second electrical sum signals, respectively, and

means connecting said first and second electrical sum signals to said first and second inputs, respectively, of said operational amplifier means.

2. In a photographic camera apparatus as recited in claim 1 wherein said individual photosensors are arranged in two substantially perpendicular directions.

3. In a photographic camera apparatus as recited in claim 2 wherein said individual photosensors form a checkerboard-like arrangement.

4. A photographic camera apparatus having an aperture with a controllable aperture setting means, a shutter release means, and a controllable exposure time setting means, said camera apparatus comprising:

circuit means including photosensor means for generating an electrical signal proportional to the degree of relative movement between an object to be photographed and said camera apparatus,

an imaging optical device having an image plane for imaging the object to be photographed,

means for generating a control signal in response to said relative movement electrical signal,

control means, responsive to said control signal, for automatically controlling at least one of said shutter release means, aperture setting means and exposure time setting means,

means mounting said photosensor means at least in the vicinity of the image plane of said imaging optical device,

said photosensor means comprising a plurality of individual photosensors arranged in two mutually perpendicular directions forming a photosensor matrix,

said circuit means comprising operational amplifier means having first and second inputs and an output connected to said means for generating,

means parallelly interconnecting alternate ones of said individual photosensors of said matrix for forming thus a first and a second group generating first and second electrical sum signals, respectively, and

means connecting said first and second electrical sum signals to said first and second inputs, respectively, of said operation amplifier means.

5. In a photographic camera as recited in claim 4 wherein said individual photosensors are arranged in two substantially perpendicular directions.

6. In a photographic camera as recited in claim 5 wherein said individual photosensors form a checkerboard-like arrangement.