Resources Contact Us Home
Athermalization and pressure desensitization of diffraction grating based spectrometer devices

Image Number 3 for United States Patent #6570652.

A device for monitoring wavelength division multiplexed optical signals for use in an optical network and in an optical performance monitor. A device has a structure for supporting components of the device. An optical component is supported at one end of the structure for transmitting the optical signals. A diffraction grating is supported at an opposing end of the structure for diffracting the optical signals from the optical component. An optical sensor is supported in relation to the diffraction grating by the structure for monitoring the optical signals. A telephoto lens assembly is supported by the structure and disposed between the optical sensor and the diffraction grating, the lens assembly having a focal length for focusing the optical signals in relation to the optical sensor. Thermal effects on the structure are balanced against thermal effects on the lens assembly. A prism is disposed between the lens assembly and diffraction grating. The prism is configured to anamorphically compress the diffracted optical signals. Thermal effects on the diffraction grating are balanced against thermal effects on the lens and prism.

  Recently Added Patents
Evaluating programmer efficiency in maintaining software systems
Camera system, video processing apparatus, and camera apparatus
Method for delivering a volatile material
Computer system and volume migration control method using the same
Cabinet door with tread pattern
Biodiesel data collection system
Patient interface
  Randomly Featured Patents
Silver halide color photographic material containing cyan dye-forming coupler
Information signal recording/reproducing apparatus with time base correction facility
Clamping device for a sliding mount
Apparatus and method for shaping random waveforms
Process of making a composite membrane
Clay-free, asbestos-free and glass microbubble-free drying type joint compounds
Self-centering thrust bearing assembly
Process for the production of fumed silica
Photoconductor film clamping and tensioning system and method of use