Last Updated：2025/11/19
A small or narrow opening, gap, slit, or hole. / (optics) A hole which restricts the diameter of the lightpath through one plane in an optical system.
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aperture
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Source Word
aperture
IPA(Pronunciation)
Noun
of a right circular cone
rare
Japanese Meaning
小さな開口部、隙間、割れ目、穴などの意味。 / 光学では、光路の直径を制限するための穴を指す。
Sense（2）
Sense（3）
Sense（4）
(space
flight,
communication)
The
(typically)
large-diameter
antenna
used
for
receiving
and
transmitting
radio
frequency
energy
containing
the
data
used
in
communication
satellites,
especially
in
the
geostationary
belt.
For
a
comsat,
this
is
typically
a
large
reflective
dish
antenna;
sometimes
called
an
array.
（ plural ）
