Resources Contact Us Home
Shutter control apparatus for a camera

Image Number 5 for United States Patent #4769667.

A camera shutter control apparatus comprises a detector for detecting the actual amount of opening of a camera shutter, comprised by a light emitter, a light detector, and a light controller for varying the amount of light passing therethrough from the light emitter to the light detector according to the detected amount of opening of the shutter. A controller controls the light emitter to emit a predetermined constant amount of light based on an output from the light detector. An operating device actuates the shutter in such a way to make the output of the light detector coincide with a signal representative of a predetermined shutter opening characteristic. The shutter is controlled to open and close following the predetermined characteristic defined by a shutter opening-closing program which is changeable according to the focal length of the camera lens.

  Recently Added Patents
Method and system for producing fluoride gas and fluorine-doped glass or ceramics
Food-grade flour from dry fractionated corn germ and collet composition and method for producing same
Systems and methods for generating customized user interfaces
Neuronal differentiation-inducing peptide and use thereof
Methods for the production of aligned carbon nanotubes and nanostructured material containing the same
Highly detectable pilot structure
Method for the synthesis of an array of metal nanowire capable of supporting localized plasmon resonances and photonic device comprising said array
  Randomly Featured Patents
One-way overrunning clutch
Copy form set
Portable therapeutic cooling system
Band printing method for preventing band overrun error in page printer
Multi-purpose trucker's power-puller tool
EL device
Determining diffusion length of minority carriers using luminescence
Rigid sign with protective changeable indicia member
Fresh water generator and fresh water generating method
Method and apparatus for reducing strapping devices