An astrograph (astrographic camera) is a telescope designed for the sole purpose of astrophotography.
Remote camera
A remote camera is a camera placed by a photographer in areas where the photographer generally cannot be or for selfies.
Snoot
In photography, a snoot is a tube or similar object that fits over a studio light or portable flash and allows the photographer to control the direction and radius of the light beam.
Maser
A maser (/ˈmeɪzər/, an acronym for "microwave amplification by stimulated emission of radiation") is a device that produces coherent electromagnetic waves through amplification by stimulated emission.
Optical microscope
The optical microscope, often referred to as light microscope, is a type of microscope which uses visible light and a system of lenses to magnify images of small samples.
Diffraction grating
In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions.
Lidar
Lidar (also called LIDAR, LiDAR, and LADAR) is a surveying method that measures distance to a target by illuminating that target with a laser light.
Photodiode
A photodiode is a semiconductor device that converts light into current.
Stroboscope
A stroboscope also known as a strobe, is an instrument used to make a cyclically moving object appear to be slow-moving, or stationary.
Glasstron
The Sony Glasstron was a family of portable head-mounted displays, first released in 1996 with the model PLM-50.
Binoculars
Binoculars or field glasses are binocular telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects.
Optical amplifier
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal.
Photoresistor
A photoresistor (or light-dependent resistor, LDR, or photocell) is a light-controlled variable resistor.
Light table
A light table is a viewing device that is used to review photographic film or artwork placed on top of it.
Video camera
A video camera is a camera used for electronic motion picture acquisition (as opposed to a movie camera, which records images on film), initially developed for the television industry but now common in other applications as well.
Dynameter
A dynameter is an instrument that measures the magnification of a telescope.
Silver halide
A silver halide (or silver salt) is one of the compounds which are formed between silver and one of the halogens – silver bromide (AgBr), chloride (AgCl), iodide (AgI), and three forms of silver fluoride.
Fiberscope
A fiberscope is a flexible fiber-optic bundle with an eyepiece on one end and a lens on the other that is used to examine and inspect small, difficult-to-reach places such as the insides of machines, locks, and the human body.
Phototube
A phototube or photoelectric cell is a type of gas-filled or vacuum tube that is sensitive to light.
Optical flat
An optical flat is an optical-grade piece of glass lapped and polished to be extremely flat on one or both sides, usually within a few millionths of an inch (about 25 nanometres).
Laser beam profiler
A laser beam profiler captures, displays, and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path.