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11 terms
Photonics Dictionary: P
Clear All Filters x
screen x
P x
phase screen
A phase screen, in the context of optics and wave optics, refers to a surface or medium that introduces a phase delay to an incident wavefront passing through it. This concept is often used in the...
panoramic lens
A lens system that is capable of producing a 360° image, or one that is very close to that. In recording, the image may be formed on a curved strip of film surrounding the lens, resulting in a...
phosphor dots
Very small phosphor particles present on the screen of a picture tube.
photometric equipment
Photocells of various kinds used to measure photometric quantities; i.e., intensity, luminance and illuminance. Meter readings are used to express illuminance and, by calibration, to measure...
picture element
->
pixel
A pixel, short for "picture element," is the smallest controllable element of a digital image or display. It is a fundamental unit that represents a single point in a raster image, which is a grid of...
pixel pitch
Pixel pitch refers to the distance between the centers of two adjacent pixels on a display screen or imaging sensor. It is typically measured in millimeters and is a crucial specification in...
pixel
A pixel, short for "picture element," is the smallest controllable element of a digital image or display. It is a fundamental unit that represents a single point in a raster image, which is a grid of...
projecting core coupler
A device that couples a light source to an optical fiber by projecting an image of the source and the fiber core onto a screen where they can be superimposed by micropositioners.
projection pointer
A device used to project a small area of light on a screen for indication.
projection thermography
The measurement of surface temperature by a thermograph that forms a pattern of the heat radiated by the surface on a luminescent screen.
proximity-focused image tube
A planar photocathode and a planar phosphor screen mounted in a close-spaced parallel configuration in an evacuated enclosure so that the ensemble of photoelectrons emitted from each photocathode...
Photonics Dictionary
P
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