THE EFFECT OF DURATION OF LIGHT ADAPTATION ON TIME REQUIRED FOR DETECTION OF A TARGET ON A SIMULATED PPI SCOPE

Abstract

The time necessary for the detection of a target on a simulated PPI scope was determined for various scope luminances after different durations of light adaptation to a luminance of 3100 mL. Target detection time increases with an increase in the duration of light adaptation up to a maximum value which varies with scope luminance. In general, detection time decreases with either an increase in target luminance or a decrease in background luminance for a given duration of light adaptation. Within the range investigated, changes in target luminance result in a greater change in detection time than comparable changes in background luminance. The implication for radar-scope viewing after adaptation to a high luminance was that optimum visibility will be obtained with a maximum gain and as much negative bias as is possible without appreciable reduction of target luminance.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1952
Accession Number
AD0012969

Entities

People

  • A. L. Diamond
  • Helmut E. Adler
  • John L. Brown

Organizations

  • Columbia University

Tags

Communities of Interest

  • Air Platforms
  • Biomedical

DTIC Thesaurus Topics

  • Bias
  • Cathode Ray Tubes
  • Cellophane
  • Color Temperature
  • Compound Semiconductors
  • Detection
  • Electronic Components
  • Electronic Equipment
  • Luminance
  • Measurement
  • Observers
  • Phosphorescent Materials
  • Phosphors
  • Polarizers
  • Steady State
  • Target Detection
  • Transparencies

Fields of Study

  • Physics

Readers

  • Circadian Sleep-Wake Regulation and Chronobiology
  • Human-Computer Interaction (HCI).
  • Sensor Fusion and Tracking Systems.