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
Co-crystals of agomelatine, a process for there preparation and pharmaceutical compositions containing them
Immunotherapy in cancer treatment
Wire catalyst for hydrogenation/dehydrogenation reaction and manufacturing method therefor
Uni-directional transient voltage suppressor (TVS)
Method for releasing a locking in mobile terminal and mobile terminal using the same
Compression molding method and reinforced thermoplastic parts molded thereby
Boundary acoustic wave device
  Randomly Featured Patents
Multi-panel glass unit having an enclosed view control component and a method for making same
Polymeric dispersants used for aqueous pigmented inks for ink-jet printing
Liquid-crystal display device and method of fabricating the same
Method and apparatus for language and speaker recognition
Shower head with interior plastic sleeve
Installation for monitoring an atmosphere generation apparatus
Liquid crystal display device performing both image display mode and fingerprint recognition mode
Packaging closures integrated with disposable RFID devices
Method for the thermochemical passivation of stainless steel
Coordinates input apparatus