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11 terms
Photonics Dictionary: F
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photographic x
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flash photographic density filter
A filter, partially opaque to near-ultraviolet, visible and infrared radiation, that may be made by exposing and processing photographic film. Such materials are almost equally opaque to radiation of...
fiber optic window
The face of a cathode-ray tube (CRT) that has a fiber optic sheet attached to its surface. The sheet's fibers are at right angles to the face, allowing the transmittance of the fluorescent trace...
field emission microscope
An image-forming instrument in which a strong electrostatic field causes cold emission of electrons from a sharply rounded point or from an object that is located on that point. The electrons are...
film plane
The site behind the lens system in a camera where photographic media are positioned for exposure.
film reader
A device used to scan images or information on photographic film for the subsequent relay of information.
film recorder
An instrument designed to place nongraphic information, usually generated by a computer, onto photographic film. The information is generally encoded as a series of opaque and translucent spots, or...
film scanning
The process by which the light from the images of photographic film is encoded into electrical signals for video transmission.
fluorescence photography
The photographic recording of a subject that exhibits luminescence only for an extremely short time (10-8 s) after the exciting source is removed. In the process, the subject may be illuminated by...
fluorography
The photographic recording of a visible image formed by the impact of invisible radiation on a fluorescent screen.
fog
1. A term used to describe the clouded appearance of an incompletely polished surface that scatters light. 2. The accumulation of moisture on an optical surface. 3. The extra spectral blackening of a...
frame camera
A high-speed cine camera that produces discrete frames of a continuous event as opposed to the flow photographic record of a streak camera.
Photonics Dictionary
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