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

Image Number 7 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
Method and apparatus for suppressing duplicate alarms
Musical instrument head mounting device
Time multiplexing of unicast and multicast signals on a downlink carrier frequency in a wireless communication system
Control method of refrigerator
Apparatus and method for internally lining an elongate member
Power feeding method to an antenna
  Randomly Featured Patents
Contact structure for use in catalytic distillation
Herbicides: N,N-dialkyl-2-(4-substituted-1-naphthoxy) propionamides
Forming machine with ram-side ejector mechanism
Heat pump systems
Apparatus for and method of making and delivering slush ice
Brass musical instruments with modifiable tonality
Exponentiation circuit and inverter based on power-sum circuit for finite field GF(2.sup.m)
Oxido reductase enzyme system obtainable from P. chrysogenum, the set of genes encoding the same and the use of oxido reductase enzyme systems or genes encoding the same for increasing antibio
Vibrating wire sensor using spectral analysis
Watercraft catalytic exhaust system