Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Liquid crystal display device
Real-time application of filters based on image attributes
Method for manufacturing a magnet coil configuration using a slit band-shaped conductor
Pull through coronary sinus pacing lead
Data unit receiver and sender control method
Navigation system and navigation apparatus
Authentication for social networking messages
  Randomly Featured Patents
Sheath composition and cable using the same
Light guide plate and side-emitting backlight module having the same
Screens for RF magnetic flux
Portable cooler container
Reaction products of a difunctional compound and an organo titanate
Invalid chair
Method of structuring thin layers
Method and apparatus of adhering belt edge tape
Exposure display device
Optical fiber connector ferrule with die and method of manufacturing same