Polarizing Filters and Underwater Vision
Medical research progress rept. no. 18
NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
Pagination or Media Count:
The effectiveness of polarizing filters in improving resolution acuity and detection thresholds under water was measured both in sunlight and under polarized artificial light. The magnitude of natural polarization of sunlight is enough to affect the thresholds as the observers polarizing filter is rotated, but vision with the filter is not reliably superior to that without the filter. In dimmer artificial light, the reduction in the amount of light reaching the eye through the filter outweighs any beneficial effects of the polarization phenomenon and visibility is decreased.
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