Accession Number:

ADA279413

Title:

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

Descriptive Note:

Journal article

Corporate Author:

PHILLIPS LAB HANSCOM AFB MA

Report Date:

1994-01-01

Pagination or Media Count:

9.0

Abstract:

Hadamard spectrometers are well known for their multiplexing andor throughput advantages. Traditionally these instruments require moving entrance andor 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.

Subject Categories:

  • Electrical and Electronic Equipment
  • Optical Detection and Detectors
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE