-
activating light, the
lenses return to
their clear state.
Photochromic lenses may be made of polycarbonate,
or another plastic.
Gl**** lenses use
visible light...
-
magnifying gl**** is a
convex lens—usually
mounted in a
frame with a handle—that is used to
produce a
magnified image of an object. A
magnifying gl**** can also...
-
compound lens consists of
several simple lenses (elements),
usually arranged along a
common axis.
Lenses are made from
materials such as
gl**** or plastic...
- A
Fresnel lens (/ˈfreɪnɛl, -nəl/ FRAY-nel, -nəl; /ˈfrɛnɛl, -əl/ FREN-el, -əl;
or /freɪˈnɛl/ fray-NEL) is a type of
composite compact lens which reduces...
- A
camera lens,
photographic lens or photographic objective is an
optical lens or ****embly of
lenses (compound
lens) used in
conjunction with a camera...
-
Crown gl**** is a type of
optical gl**** used in
lenses and
other optical components. It has
relatively low
refractive index (≈1.52) and low dispersion...
- An
achromatic lens or achromat is a
lens that is
designed to
limit the
effects of
chromatic and
spherical aberration.
Achromatic lenses are corrected...
- homogeneity,
poured into
lens blanks and
annealed according to
empirically determined time-temperature schedules. The
gl**** blank pedigree,
or "melt data", can...
- astigmatism, and presbyopia. Gl****es
or "spectacles" are worn on the face a
short distance in
front of the eye.
Contact lenses are worn
directly on the surface...
- An antireflective,
antiglare or anti-reflection (AR)
coating is a type of
optical coating applied to the
surface of
lenses,
other optical elements, and...
