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light intensity Dictionary Terms

photoconductor
A light-sensitive resistor in which resistance decreases with increase in light intensity when illuminated. The device...
photomultiplier tube
A photomultiplier tube (PMT) is a highly sensitive vacuum tube that detects and amplifies low levels of light. It is widely...
liquid crystal light valve
A liquid crystal light valve (LCLV), also known as a spatial light modulator (SLM), is an optical device that modulates the...
photodetector
A photodetector, also known as a photosensor or photodiode, is a device that detects and converts light into an electrical...
discrimination
The degree to which a vision system is capable of sensing differences in light intensity between two regions.
Kerr effect
The Kerr effect, named after the physicist John Kerr who first observed it in 1875, is a nonlinear optical phenomenon where...
point spread function
The point spread function (PSF) is a fundamental concept in imaging that describes the response of an imaging system to a...
spectrophotometer
A spectrophotometer is a scientific instrument used to measure the intensity of light at various wavelengths in the...
light field
The term light field refers to the spatial distribution of light rays traveling in all directions through a given space. It...
optical tweezers
Optical tweezers refer to a scientific instrument that uses the pressure of laser light to trap and manipulate microscopic...
linear image sensor
A linear image sensor is a type of solid-state electronic device used to capture and convert light into electrical signals....
isophote
A curve or surface having equivalent light intensity.
fiber optic sensor
A fiber optic sensor is a device that uses optical fibers to detect and measure physical, chemical, biological, or...
time-correlated single photon counting
Time-correlated single photon counting (TCSPC) is a technique used in photon counting applications, particularly in the...
responsivity
The gain that occurs between light intensity incident on a CCD given by the photocurrent produced.
silicon photodiode
A silicon photodiode is a semiconductor device that converts light into an electrical current. It is a type of photodetector...
reflective
The term reflective is an adjective that describes the ability of a surface or material to reflect light or other forms of...
photometry
Photometry is the branch of science that deals with the measurement of light, particularly in terms of its intensity and the...
entrance slit
The entrance slit, also known simply as the slit, is an essential component in optical instruments such as spectrometers and...
nonlinear optics
Nonlinear optics is a branch of optics that studies the optical phenomena that occur when intense light interacts with a...
image intensifier
An image intensifier, also known as an image intensification tube or image intensification device, is a specialized...
photoplethysmography
Photoplethysmography (PPG) is a non-invasive optical technique used to detect changes in blood volume in tissues. It...
photobleaching
Photobleaching is a phenomenon in which the fluorescence of a fluorophore (a fluorescent molecule or dye) is permanently...
optical filter
An optical filter is a device that selectively transmits or blocks specific wavelengths, or colors, of light. Optical...
PIN photodiode
A PIN photodiode is a type of photodetector or semiconductor device used to convert light signals into electrical signals....
edge-defined film-fed growth
Process for growth of solar cells that results in rectangular shapes consisting of many interconnected cells in a series or...
optoelectronics
Optoelectronics is a branch of electronics that focuses on the study and application of devices and systems that use light...
critical flicker frequency
Relative to a light source, the frequency at which the source appears to fluctuate in light intensity half the time and...

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