aperture

Tanımlar (İngilizce)

1. isim A small or narrow opening, gap, slit, or hole.

   “an aperture in a wall”

2. isim A hole which restricts the diameter of the lightpath through one plane in an optical system.
3. isim The diameter of such a hole which restricts the width of the lightpath through the whole system. For a telescope, this is the diameter of the objective lens.

   “This telescope has a 100 cm aperture.”

4. isim 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.
5. isim The maximum angle between the two generatrices.

   “If the generatrix makes an angle θ to the axis, then the aperture is 2θ.”