Resources Contact Us Home
Electro-optical interferometric microdensitometer system

Image Number 5 for United States Patent #5255069.

There is disclosed an interferometric system including electro-optical apparatus and method for examining and characterizing ultra fine details of various specimens such as a piece of photographic film. The method includes illuminating a specimen with a thin wide substantially pure Gaussian light beam, detecting the interfering patterns of light from the specimen, and characterizing ultra fine details of elements of the specimen by means of the detected light patterns. The apparatus includes a laser, a magnifying telescope, a multi-prism beam expander, and a linear array of photo-diodes. Signals from the photo-diodes are displayed on an optical multichannel analyzer (OMA) to provide a waveform characteristic of ultra fine elements of the specimen. Both "near-field" and "far-field" characterizations are possible and details of elements having diameters of the order of the wavelength of the light used (e.g., about 0.6 .mu.m) are detected.

  Recently Added Patents
Positive electrode active material for nonaqueous electrolyte secondary battery
Using sets of OTDR receive fibers with different lengths of marker events to verify optical fiber connectivity
Modular utility rack
Housing for gas flow indicator
Polyester resin for toner, electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming met
Rotating sunlight/light beam for fractional/beneficial use
Algorithm for color corrected analog dimming in multi-color LED system
  Randomly Featured Patents
Recreational vehicle toilet with foot pedal flush
Method and circuit for reading a dynamic memory circuit
Menu-driven input of SMS-messages
Visual inspection device and process
Multi directional input apparatus
Combined handkerchief, tie and belt holder
Miniature rose plant named `Savamor`
Brush seal device
Connector attachment for a pallet assembly
Fluid-driven motor and fertilizer feeding device utilizing same