. Airborne radar. Airplanes; Guided missiles. Background Brightness Ml S=Spot Brightness (millilamberts) 1 1 rS3 = . m-i . mN\= — —j- V^ g— =i 1/ r $4= Wll^/ 55= m—'- 4y-. 100 120 ^ 0 20 40 60 80 100120 0 20 40 60 80 100 120 0 20 40 60 LIGHT ADAPTATION TIME (sec) (a) (c) (b) Fig. 12-23 Time for Detection as a Function of Target Brightness and Duration of Light Adaptation. exposing the subjects to a brightness level of 3100 millilamberts for 5, 15, 30, 60, and 120 seconds prior to attempting spot detection. The three sets of curves differ only in the amount of background br
. Airborne radar. Airplanes; Guided missiles. Background Brightness Ml S=Spot Brightness (millilamberts) 1 1 rS3 = . m-i . mN\= — —j- V^ g— =i 1/ r $4= Wll^/ 55= m—'- 4y-. 100 120 ^ 0 20 40 60 80 100120 0 20 40 60 80 100 120 0 20 40 60 LIGHT ADAPTATION TIME (sec) (a) (c) (b) Fig. 12-23 Time for Detection as a Function of Target Brightness and Duration of Light Adaptation. exposing the subjects to a brightness level of 3100 millilamberts for 5, 15, 30, 60, and 120 seconds prior to attempting spot detection. The three sets of curves differ only in the amount of background brightness around the spot. Each figure shows the detection time as a function of spot brightness for a given background brightness and duration of exposure to the high brightness level. These figures suggest that if the exposure lasts as long as 60 seconds, an additional 60 seconds has little effect. Fig. 12-24 is a plot of the data for an exposure time of 120 seconds and shows the relationships that exist among the variables as a function of contrast. These figures suggest that if the operator is exposed to high. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Povejsil, Donald J. Princeton, N. J. , Van Nostrand
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Keywords: ., bookcentury1900, bookcollectionbiodiversit, booksubjectairplanes
