| Title | Two-flash thresholds as a function of flash luminance and area. |
|---|---|
| Record ID | 39039 |
| Personal Name Creator |
Lewis, Mark F. |
| Corporate Contributor |
United States. Office of Aviation Medicine |
| Publisher | Civil Aerospace Medical Institute |
| Publication Date | 19680900 |
| Language | English |
| 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. |
| Rosap ID | dot:20865 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/20865 |
| TRT Terms | Air pilots; Signal lights; Strobes; Vision; Night vision; Vision tests; Pulse duration modulation; Luminance; Luminous intensity; Optical devices; Dark adaptation; Human subject testing; Time duration |
| General Subjects | Air pilots; Signal lights; Stroboscopes; Vision--Testing; Night vision; Luminescence; Pulse duration modulation; Stimulus intensity |
| Classification | NTL - AVIATION - AVIATION; NTL - AVIATION - Aviation Human Factors |
| Geographical Coverage |
United States |
| Report Number | AM 68-20; DOT/FAA/AM-68/20 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/39000/39000/39039/AM68-20.pdf |
| Format | |
| Database | NTL Digital Repository |