Evaluation of a Hadamard-Coded Photodiode-Array Spectrometer Under Low Illumination

Abstract

Hadamard spectrometers are well known for their multiplexing and/or throughput advantages. Traditionally these instruments require moving entrance and/or exit masks. The performance of a breadboard photodiode-array Hadamard transform spectrometer with a stationary entrance mask is evaluated against the same instrument configured with a single entrance slit. The higher throughput of the multislit, no-moving parts instrument has provided a higher signal-to-noise ratio over the single-slit spectrometer in low-illumination conditions. Sources of noise are examined for the single-slit and multislit Hadamard instruments, and improvements for future designs are suggested.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1994
Accession Number
ADA279413

Entities

People

  • Joseph L. Robichaud
  • Roger A. Van Tassel
  • Wallace K. Wong

Organizations

  • Phillips Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Bandpass Filters
  • Detectors
  • Diffractometers
  • Electromagnetic Spectra
  • Focal Planes
  • Measurement
  • Multiplexing
  • Radiation
  • Software Development
  • Spectra
  • Spectral Lines
  • Spectrometers
  • Spectroscopy
  • Stationary
  • Test And Evaluation

Readers

  • Image Processing and Computer Vision.

Technology Areas

  • Directed Energy