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17 terms
Photonics Dictionary
Clear All Filters x
projected image x
3D laser line profile sensor
A 3D profile sensor, also known as a 3D profiling sensor or 3D depth sensor, is a technology that is used to capture and measure the three-dimensional shape or profile of an object or a scene. These...
brightness meter
An instrument for measuring the brightness (luminance) of a scene. It may be a spot meter, covering an area of a degree or less, or an averaging meter, covering a broad area of the scene. Brightness...
comparison microscope
Two microscopes that are coupled on a common stand, the two images being projected side by side in the field of view of a single eyepiece for comparison.
contour projection chart
A large-scale, precise drawing of the contours of a perfect mechanical part, often with plus and minus tolerances drawn or indicated. For quality control decisions, enlarged images of mechanically...
frames per second
The number of separate images exposed by a cine camera in a second or the number illuminated by a cine projector in a second. By varying the number of images recorded per second, films can be created...
head-up display
A head-up display (HUD) is a transparent display technology that presents information directly in the field of view of a user, typically without requiring the user to look away from their usual...
holographic cinematography
A technique used to create a series of interrelated holographic images that give an appearance of motion when projected in sequence. A flashing laser is used in both the recording and projecting of...
image iconoscope
A camera tube similar in design to the iconoscope. However, the image formed in the image iconoscope is projected on a photocathode that emits photoelectrons to be focused on a material, forming the...
keystone distortion
A type of geometrical distortion that brings about a trapezoidal display of a nominally rectangular picture. Usually produced when a picture is projected abnormally to the screen.
liquid crystal on silicon
Liquid crystal on silicon (LCoS) is a display technology that combines liquid crystal materials with silicon-based semiconductor technology to create high-resolution, high-quality images. LCoS...
microchannel spatial light modulator
A device to modulate spatially a collimated coherent beam of light with input data in optical data processing. It uses a photocathode mounted on a microchannel plate, which amplifies an electron...
microfiche
A small card (10 x 15 cm) that has been treated with a photographic emulsion to record and store the microimages of documents and graphic information projected on it by a microfilm camera. A...
microfilm reader
A device used to view microfilmed documents where the image on film is projected, in magnified form, onto a rear projection screen for viewing.
moving aperture technique
Method for reducing laser speckle in which the object field comes from a real diffuse object or the reconstructed object field from a hologram. During recording of the image, an aperture is moved in...
relay condenser
A form of lens assembly used in a projection system to maximize efficiency and assure uniform illumination of the object being projected.
screen
The large, usually flat surface onto which an image is projected for viewing. May be reflecting or transmitting (rear projection).
television projection
A television display system in which the television signal is converted to an image that is projected onto either a front or rear projection screen.
Photonics Dictionary
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