Eye and Face Protection eTool: Glossary
By
U.S. Department of Labor,
Occupational Safety & Health Administration,
Constitution Avenue, NW,
Washington, DC 20210, U.S.A.
http://www.osha.gov/SLTC/etools/eyeandface/glossary.html
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cleanable:
to be free of dirt or debris without being damaged by
the cleaning process.
face shield: protective equipment generally used
to protect the wearer's face, or portions thereof, in
addition to the eyes, from a variety of hazards. Face
shields are secondary protectors and must be worn only
with primary protective devices.
filter lens: a lens that protects against various
degrees of ultraviolet, visible, and infrared rays.
front: the portion of a protective device frame
that is intended to hold the lens or lenses.
glare: uncomfortably bright light not including
dangerous degrees of ultraviolet or infrared light.
goggle: goggles fit the face directly surrounding
the eyes in order to protect the eyes from a variety
of hazards. They can be used as a primary protector,
or in combination with other eye and face protection.
hand shield: a hand-held welding helmet.
headgear: the part of the protective equipment,
such as a protective helmet, hood or face shield that
supports the device on the user's head.
hood: protective equipment that covers the head,
neck, and portions of the shoulders.
impact resistance: the capacity of a device to
resist impact.
infrared radiation (IR): Invisible electromagnetic
radiation with wavelengths which lie within the range
of 0.70 to 1000 µm.
laser: An acronym for light amplification by
stimulated emission of radiation. A laser is a cavity
with mirrors at the ends, filled with material such
as crystal, glass, liquid, gas or dye. It produces an
intense beam of light with the unique properties of
coherency, collimation, and monochromaticity.
lens, impact-resistant: a lens designed and tested
to resist breakage when impacted by an object.
lens, non-removable: a lens that is permanently
attached to a frame.
lens, plano: a lens that does not include a corrective
prescription, afocal.
lens, prescriptive: a lens made for an individuals
specific vision correction.
lens, special purpose: a lens that is designed
for visual tasks which require unusual filtering of
light.
lift-front: a lens that may be raised from its
usual down position as needed.
light: The range of electromagnetic radiation
frequencies detected by the eye, or the wavelength range
from about 400 to 760 nm. The term is sometimes used
loosely to include radiation beyond visible limits.
optical density: A logarithmic expression for
the attenuation produced by an attenuating medium, such
as an eye protection filter.
optical radiation: Ultraviolet, visible, and
infrared radiation (0.35-1.4 µm)
that falls in the region of transmittance of the human
eye.
photochromic lens: a lens designed to darken
when exposed to sunlight and fade when removed from
the sunlight.
primary protector: personal protective device
such as spectacles or goggles that may be worn alone
or in combination with a secondary protector.
radiant energy (Q): Energy in the form of electromagnetic
waves usually expressed in units of Joules (watt-seconds).
secondary protector: personal protective equipment
that can only be worn in combination with a primary
protector.
side shield: a device attached to the front of
the frame designed to provide angular protection from
impact hazards.
spectacles: protective devices intended to safeguard
the wearer's eyes from a variety of hazards. They are
generally used to provide primary protection from impact
and optical radiation.
temple: the component of an eye and face protective
device extending from the frame to the ear, designed
to fit the wearer and hold the device into place.
ultraviolet (UV) radiation: Electromagnetic radiation
with wavelengths between soft X-rays and
visible violet light, often broken down into UV-A
(315-400 nm), UV-B (280-315
nm), and UV-C (100-280 nm).
visible radiation (light): Electromagnetic radiation
which can be detected by the human eye. It is commonly
used to describe wavelengths in the range between 400
nm and 700-780 nm.
wavelength: The length of the light wave, usually
measured from crest to crest, which determines its color.
Common units of measurement are the micrometer (micron),
the nanometer, and (earlier) the Angstrom unit.
welding helmet: a shielding device using special
absorptive lenses that filter the intense light and
radiant energy that is produced during welding operations.
window: a transparent protective device.
window, non-removable: a window that is permanently
attached to a frame or headgear.
Source:
http://www.osha.gov/SLTC/etools/eyeandface/glossary.html
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