- A
magnifying gl**** is a
convex lens that is used to
produce a
magnified image of an object. The
lens is
usually mounted in a
frame with a handle. A magnifying...
-
activating light, the
lenses return to
their clear state.
Photochromic lenses may be made of polycarbonate,
or another plastic.
Gl**** lenses use
visible light...
-
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
burning gl**** or burning lens is a
large convex lens that can
concentrate the Sun's rays onto a
small area,
heating up the area and thus
resulting in...
-
Uranium gl**** is
gl**** which has had uranium,
usually in
oxide diuranate form,
added to a
gl**** mix
before melting for colouration. The
proportion usually...
- An
achromatic lens or achromat is a
lens that is
designed to
limit the
effects of
chromatic and
spherical aberration.
Achromatic lenses are corrected...
-
objective itself is
usually a
cylinder containing one
or more
lenses that are
typically made of
gl****; its
function is to
collect light from the sample....
-
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...
- homogeneity,
poured into
lens blanks and
annealed according to
empirically determined time-temperature schedules. The
gl**** blank pedigree,
or "melt data", can...
