The phrase "an optical device" is correct and usable in written English.
You can use it when referring to any instrument or tool that manipulates light to achieve a specific function, such as lenses, microscopes, or telescopes.
Example: "The scientist used an optical device to magnify the tiny organisms in the water sample."
Alternatives: "a light-manipulating instrument" or "a vision-enhancing tool."
The draughtsman uses an optical device constructed as a frame.
Its 2,000 parts combined an optical device, a gyroscope and an analog computer.
A. A coronagraph is an optical device that blocks the light from the sun's disk, making it possible to observe the corona, the very thin and hot upper level of the solar atmosphere, at the edge of the disk.
Shaped like a 35-millimeter camera sitting on its back, lens pointing upward, the Giant Camera contains a large camera obscura, an optical device conceived over 2,000 years ago.
David Stork, an associate professor of computer science at Stanford University, considered the little convex mirror in van Eyck's Arnolfini wedding picture, the mirror that, Mr. Hockney suggests, van Eyck could have flipped over and used as an optical device.
When the stereogram is placed in a stereoscope, an optical device for enabling the two separate pictures to be fused and seen single, the impression created is one of a three-dimensional object.
The COOLS trial is a multicenter, phase III randomized controlled trial comparing 2 surgery approaches, one guided with a optical device (VELscope; experimental arm) and one without (control arm), which is different from the conventional drug trial.
A new artificial rubber that plays sophisticated tricks with light has found a niche in an unusual optical device: a stretchable laser that changes its wavelength when pulled like taffy.
A medical endoscope is an elongated optical device used to observe otherwise inaccessible areas within the human body through a small orifice in either a non-invasive or minimally invasive manner [ 1].
The diffuse highlights Vermeer achieved are comparable to those seen in a camera obscura, a fascinating optical device that operates much like a box camera.
The system uses a point laser source through a rotating optical device fixed on to a laser measurement meter.
