Resources Contact Us Home
Light metering system with user reference preselection capability

Image Number 2 for United States Patent #4751542.

A light metering system which allows the user to select a color or gray scale reference for the system prior to operation of the apparatus (e.g. camera) with which the light metering system functions. The preselected reference chosen by the user takes into account values which will be recorded on an image recording element by the apparatus. The system is to be used on apparatus where shutter speed and diaphragm aperture settings are determined on the basis of the luminous power of the subject to be photographed taking into account the behavior of an element (e.g. film) on which the image is to be reproduced. The system includes a color selector mechanically associated with a color scale which, in turn, is directly related to a gray scale having a light intensity indicator. The light indicator is connected to a diaphragm aperture control device and to a shutter speed selector mechanism. The output of a light response curve selector of the element on which the image is to be reproduced is also connected to the diaphragm aperture control device. A preferred form of the diaphragm aperture control device is a microprocessor.

  Recently Added Patents
Biological analysis arrangement and approach therefor
Plural component proportioner
Process to increase selectivity to ethylene in oxygenates-to-olefins conversions
Spoofing detection for civilian GNSS signals
Generating a network map
Firewall-tolerant voice-over-internet-protocol (VoIP) emulating SSL or HTTP sessions embedding voice data in cookies
Field emission cathode structure
  Randomly Featured Patents
Flash device and reflector for flash discharge tube
Method of shaping thermoplastic compositions on aluminum foil support
Heat sink assembly including a printed wiring board and a metal case
Cyclic peptide catalysts modeled on enzyme active sites
Method, apparatus and system for use in multimedia signal encoding
Apple tree named `Western Dawn`
Sit up device
Continuous television transmission reproduction and playback
Recovery of copper from its sulfides and other sources using halogen reagents and oxidants
Compositions and methods for treatment of neurological disorders and neurodegenerative diseases