(science and technology regarding visible light)
The word optics refers to the science and technology
regarding the behavior and handling of visible light,
the term being used for the principles and mechanisms of telescopes
and telescopic instruments such as cameras/imagers and spectrographs.
It is also used for portions of ultraviolet and infrared
spectra that are adjacent to visible light, and are handled using
virtually the same equipment. Thus the adjective optical
easily also refers to near infrared and near ultraviolet.
The word optics is often used to mean an optical device or
the optical portion or aspect of a device.
Further from visible light, there are often parallels regarding
design and sometimes the word optics is borrowed.
adaptive optics (AO)
Association of Universities for Research in Astronomy (AURA)
Large Altazimuth Telescope (BTA-6)
coudé focus telescope
velocity dispersion (σ)
European Southern Observatory Very Large Telescope (ESO VLT)
Hubble Space Telescope (HST)
integral field unit (IFU)
integral field spectrograph
liquid mirror telescope
linearly variable filter (LVF)
optical depth (τ)
pointing error (PE)
point-spread function (PSF)
Southern African Large Telescope (SALT)
speed of light (c)
wavefront error (WFE)