The draughtsman uses an optical device constructed as a frame.
Is it a lenticular optical device that displays a holographic image?
Its 2,000 parts combined an optical device, a gyroscope and an analog computer.
If no recording device is used, then the optical device is technically referred to as a spectroscope.
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 procedure depended on a Michelson interferometer, a sensitive optical device that compares the optical path lengths for light moving in two mutually perpendicular directions.
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.
Ms. Hochstrasser does not mention it, but I would not be surprised to learn that van Aelst used some sort of newfangled optical device like the camera obscura to achieve his often nearly photographic verisimilitude.
The two functions are integrated, keeping the optical device thin.
