War goggles have interchangeable plastic lenses
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Title (Dublin Core)
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War goggles have interchangeable plastic lenses
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Article Title and/or Image Caption (Dublin Core)
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Title: War goggles have interchangeable plastic lenses
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extracted text (Extract Text)
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A REVOLUTIONARY war goggle with
interchangeable lenses, designed to af-
ford maximum protection against wind and
glare and to adapt the eyes to night vision
without the necessity of a “blind period,”
has been perfected after almost a year of
joint research by scientists of the Polaroid
Corporation of America and the Medical
Research Section of the Navy's Bureau of
Aeronautics.
Wearing the dark-adapter lens, a pilot
can precondition his eyes while studying his
air plot or working on his navigation chart,
or a sentry while dressing or getting ready
to go on duty. It is described by the Navy
as “a thin, red color filter bonded between
two layers of optical plastic, which allows
practically no light to stimulate the por-
tion of the retina used in night vision.” A
half hour of wearing it cuts to three min-
utes the time needed in full darkness to
attain maximum night vision.
Three other types of interchangeable
plastic lenses are made—a green-tinted
lens, which is a polarizing, anti-glare filter,
a clear lens for protection against wind, and
a green non-polarizing lens. The green and
clear lenses are packed in a kit for ground
troops and tank crews. All lenses are pre-
cision surfaced by a secret process.
The frame, constructed of a single piece
of molded sponge rubber, embodies a basic
new design. It contains no leather or cloth,
and no metal except a small one-piece
buckle for adjusting the headband. It has a
single aperture, thus eliminating the blind
spot usually caused by a nosepiece or hinge.
The lens when fitted into the frame is held
by four snap fasteners and the pressure of
the headband, but may be removed and a
new one inserted in a few seconds. Indirect
ventilation ducts encircle the top of the
frame, and prevent fogging and sweating
around the eyes.
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Language (Dublin Core)
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Eng
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pages (Bibliographic Ontology)
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119
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Rights (Dublin Core)
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Public domain
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Archived by (Dublin Core)
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Sami Akbiyik
Popular Science Monthly, v. 141, n. 1, 1942
