Resources Contact Us Home
Wavelength selection, multiplexing and demultiplexing method and apparatus

Image Number 6 for United States Patent #6038076.

Wavelength selection apparatus for use in various applications such as spectrometry, the demultiplexing/multiplexing of multiline laser beams, and so forth, includes an input prism and an output prism aligned along an optical axis, and at least one side mirror. A second side mirror spaced from the first side mirror on the opposite side of the optical axis may be provided, as well as end mirrors adjacent to the input and output prisms. An incoming beam incident upon the input prism is refracted so as to deflect and angularly disperse the various wavelengths present in the input beam, with the dispersing beam reflected from the first side mirror either directly to the output prism or with intermediate reflections from the second side mirror and the end mirrors before impinging upon the output prism. The output prism matches the input prism and deflects and recollimates the dispersed wavelengths to provide parallel output beams of different wavelengths spaced from one another. Selection of a desired wavelength in the output beam may be obtained by moving the input and output prisms with respect to each other axially until the desired output beam is moved to a position in which it passes through an aperture.

  Recently Added Patents
Methods and apparatus for providing video on demand and network PVR functions using IP streaming
Personalized health communication system
Vehicle and method for controlling vehicle
Sealed, waterproof digital electronic camera system and method of fabricating same
Mobile phone
Transferases and oxidoreductases, nucleic acids encoding them and methods for making and using them
Apparatus and method for categorizing services using canonical service descriptions
  Randomly Featured Patents
Umbilical line stand-off assembly for marine riser assembly
Burner for combustion chamber and combustion method
Cellulose based optical film material and method for forming the same
Opthalmic characteristic measuring apparatus
Apparatus for forming images
Control device of internal combustion engine
Robotic system and methods of use
Relief of inter-compartment differential pressure in aircraft
Halogen-lamp illumination/control circuit
Method and apparatus for in-progress call forwarding