Accession Number:

AD0742079

Title:

Improvement of Vision Under Water with Chromatic Filters

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT

Personal Author(s):

Report Date:

1971-08-23

Pagination or Media Count:

24.0

Abstract:

Detection and resolution thresholds for blue and yellow targets against blue, green, and yellow backgrounds were measured while wearing yellow and blue filters. Yellow filters improved thresholds for yellow targets against blue backgrounds. Their effectiveness decreased i as the wavelength of the background increased, ii as the size of the target decreased, and iii with the age of the observer. The blue filters were generally ineffective. The results are for the most part explained on the basis of changes in target contrast brought about by the filters. The effectiveness of yellow facemasks for divers under certain conditions is discussed.

Subject Categories:

  • Anatomy and Physiology
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE