Two-flash thresholds as a function of flash luminance and area.

Details

• Creators:
  Lewis, Mark F.
• Corporate Contributors:
  United States. Office of Aviation Medicine
• Subject/TRT Terms:
  Air Pilots Dark Adaptation Human Subject Testing Luminance Luminescence Luminous Intensity Night Vision Optical Devices Pulse Duration Modulation Signal Lights Stimulus Intensity Strobes Stroboscopes Time Duration Vision Vision--Testing Vision Tests

  More +
• Publication/ Report Number:
  AM 68-20 ; DOT/FAA/AM-68/20
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Civil Aerospace Medical Institute
• Abstract:
  The recent use of strobe lights in aviation suggests the possibility of using temporal patterns of short duration flashes as information-carrying signals. Under night flight conditions, two-flash thresholds were obtained using a two-interval, temporal forced-choice technique with foveally fixated circular targets varying in luminance and area. For all subjects the results replicated a previous finding that two-flash thresholds are a negatively accelerated function of flash luminance, but the function was shown to be dependent on area, a greater threshold change occurring at smaller areas. Two-flash thresholds were also found to be a decreasing function of stimulus area, with the greatest threshold change occurring at low luminances.
• Format:
  PDF
• Collection(s):
  FAA Civil Aerospace Medical Institute US Transportation Collection
• Main Document Checksum:
  urn:sha-512:3a3bd96da55e895a95e050e343b58abfa5579a099db41721c0836e3f6514ed4da6798667abf6d9507b95b3dd48192debb5e1f81301b9c0aa1ee65a5558633240
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/20865/dot_20865_DS1.pdf
• File Type:
  [PDF - 427.56 KB ]