The effect of duration of light adaptation on time required for detection of a target on a simulated PPI scope

Item

Title
The effect of duration of light adaptation on time required for detection of a target on a simulated PPI scope
Date
1952
Index Abstract
Coming Soon
Photo Quality
Undetermined
Report Number
WADC TR 52-259
Creator
Brown, J. L.
Diamond, A. L.
Adler, H. E.
Corporate Author
Columbia University
Extent
28
NTRL Accession Number
AD012969
Identifier
AD0012969
AD Number
12969
Access Rights
Unknown
Distribution Classification
1
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
AFAL ltr
Distribution Change Action Date
9/16/2002
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.
Report Availability
Not available via Contrails
Date Issued
1952-02
Index In
DTIC
Type
report