Resources Contact Us Home
Double polarized light beam spectrophotometer of light source modulation type

Image Number 5 for United States Patent #4645341.

A double polarized light beam spectrophotometer of a light-source modulation type. A modulated light beam emitted by a light source is conducted through specimen atom vapor generated by a graphite atomizer. Wavelength of light undergone atom absorption is selected and spatially separated into a pair of linearly polarized light beams perpendicular to each other. The pair of the linearly polarized light beams separated are alternately passed through a chopper and received by a photoelectric conversion device to be converted into electric signals which are utilized for determining atomic absorption of the specimen. The phase of modulation of light radiated from the light source is synchronized with phase of a current supplied to the graphite atomizer for heating thereof and the switching timing of the chopper.

  Recently Added Patents
Control unit of a ride level control system, and ride level control system
Method and apparatus for determining the altitude of a mobile device
Method of controlling an indentation depth of an electrode into a metal substrate during welding
Method for etched cavity devices
Security authentication method, apparatus, and system
Device and method including a soldering process
Millimeter wave imaging method and system to detect concealed objects
  Randomly Featured Patents
Ear muff
Optical testing of integrated circuits with temperature control
Pyrrole polymers as electrical heating elements
Saddle span shelter and joining system
Acoustic log
Automatic gain control circuit of radio receiver
Door latch
Bottom electric heating element systems and ovens
User adjustable gamut mapping and conversion of images from a source color space to a destination color space including primary and redundant colors
Method of and system for interrupting and parking calls in a switched telecommunications network