Resources Contact Us Home
Optical glass sorting machine and method

Image Number 3 for United States Patent #6144004.

A glass sorting machine optically sorts glass cullet according to different color characteristics by irradiating the cullet with red, green and blue light as the cullet are passed through a sensing region between a light source and light sensors responsive to the different light colors. The attenuation levels of the different light colors are measured by the sensors as the cullet passes through the sensing region. The machine analyzes the attenuation levels to determine the color characteristics of the cullet. A collimator is typically used to enhance shadow definition. In one embodiment, a pixel grid map is made of the sensing region and each cullet that passes through the sensing region. Mapped on to each grid is a red, green, and blue digital signal. Attenuated signals are compared against baseline values to determine the attenuation for given cullet. The pixel grid map may be used with a data erosion technique to compensate for refraction. To reduce errors associated with optical impurities, the machine normalizes the baseline values when cullet are not in the sensing region by taking the derivative of the sensed signal and normalizing the baseline signal when no cullet are present.Another embodiment of the invention further employs infrared wavelength light to better sort ceramics as well as visibly transparent glass that is infrared opaque.

  Recently Added Patents
Fabrication of thin pellicle beam splitters
Location-type tagging using collected traveler data
Image reading apparatus, image reading method and program
Downlink scheduling in fractional frequency reuse (FFR) systems
Correction information calculating device, image processing apparatus, image display system, and image correcting method
Pharmaceutical compositions of paclitaxel, paclitaxel analogs or paclitaxel conjugates and related methods of preparation and use
Vaccine composition against Streptococcus pyogenes
  Randomly Featured Patents
Method and system of measuring IAP using a naso-enteric tube
Combination electronic circuit element with multidirectionally adjustable joints
Transmissive holographic optical element on aberrating substrate
Antibodies to p40
Method and apparatus for measuring hemostasis
Syringe for one sole use
Method of transmitting orthogonal frequency division multiplex signal, and transmitter and receiver employed therefor
Caladium plant named `SNOW WHITE PARK`
Adjustably positionable display and lighting arrangement
Conduit bundles including first-type and second-type conduits with disparate properties