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Gram positive
Gram-positive bacteria are a group of bacteria that have a thick cell wall composed primarily of a substance called...
achromat
An achromat, in the context of optics, refers to a type of lens or lens system designed to reduce chromatic aberration....
secondary color
An aberration that remains after primary color is corrected. Primary color causes the back focus of a lens to vary with...
pixel
A pixel, short for "picture element," is the smallest controllable element of a digital image or display. It is a...
Tyndall effect
The effect by which sufficiently small particles will scatter blue light at right angles to the incident beam. This...
mercury arc
An electric arc that is formed in mercury vapor through which an electric current flows. The intensity of the illumination...
primary colors
A set of three colored lights which, when mixed, give the sensation of white light. The set used in color television, for...
color photographic film
Film that produces color negatives or transparencies by the use of three emulsions, one coated over the other, that are each...
fluorescent microscope
A type of optical microscope that allows the specimen being viewed to be irradiated by ultraviolet, violet and occasionally...
multispectral imaging
Multispectral imaging is a technique that involves capturing and analyzing images at multiple discrete spectral bands within...
III-V material
In semiconductor physics and materials science, the term "III-V materials" refers to compounds composed of elements from...
flame spectroscopy
The study of flames by means of a laser emitting blue light and a spectrometer to measure the green fluorescence created by...
cadmium lamp
A mercury vapor discharge lamp that has cadmium added to emit radiation in the red region as a complement to the mercury...
apochromat
An apochromat, often referred to as an apochromatic lens or apochromatic objective, is a type of optical system designed to...
Abbe condenser
A two-lens arrangement intended to image light into a microscope slide sample. The primary aberrations present are red and...
GaN-based LEDs
Gallium nitride-based light-emitting diodes (GaN-based LEDs) are semiconductor devices that emit light when an electric...
gallium nitride
Gallium nitride (GaN) is a compound made up of gallium (Ga) and nitrogen (N). It is a wide-bandgap semiconductor material...
infrared camera
An infrared camera, also known as a thermal imaging camera or IR camera, is a device that captures and visualizes the...
orthochromatic film
Black and white film that is sensitive to green, blue and violet light but not to red light.
matrix
With respect to television, that part of a color television circuit that combines the I, Q and Y signals, and changes them...
triad
In a color cathode-ray tube, a grouping of three color dots (red, blue and green) that represent one pixel in the final...
histochemical staining
Histochemical staining is a laboratory technique used in biology and medicine to visualize specific chemical components...
hyperspectral imaging camera
A hyperspectral imaging camera is a sophisticated imaging device capable of capturing and processing data across a wide...
Talbot's bands
The series of interference bands that appear in the spectrum when a specified glass plate is inserted into a spectroscope,...
blue noise
Noise over a specified frequency range, in which the spectral density is proportional to the frequency instead of being...
Rayleigh scattering
Rayleigh scattering is a phenomenon that occurs when light waves interact with particles or molecules that are much smaller...
subtractive colors
Cyan, magenta and yellow. They are called subtractive because they each subtract one color by absorbtion and reflect the two...
light-emitting diode
An LED, or light emitting diode, is a semiconductor device that emits light when an electric current passes through it. LEDs...
sapphire
Sapphire can refer to either a gemstone or a specific type of crystalline material commonly used in various industrial...
laser crystal
A laser crystal, also known as an active medium or gain medium, is a solid-state material used in the construction of...
supertwisted birefringent effect display
A liquid crystal display using the material in its supertwisted nematic phase; the birefringence of the liquid crystal...
hyperspectral imaging
Hyperspectral imaging is an advanced imaging technique that captures and processes information from across the...
lenticular color photography
A type of additive color photography using a lenticular structure impressed on a film base and a camera lens with a filter...
magenta
The reddish/purple color that results when equal amounts of blue and red are combined so that no one wavelength dominates.
digital camera
A digital camera is a device that captures and records still images or video in digital format. Unlike traditional film...
blue diode laser
A blue diode laser is a type of semiconductor laser that emits light in the blue wavelength range of the electromagnetic...
red, green, blue
RGB stands for red, green, blue, which are the primary colors of light used in additive color mixing. The RGB color model is...
trinoscope
A color-television viewing system with three kinescopes, three lenses and three deflection yokes used to form the red, green...
bluestone
An edging stone having a relatively coarse abrasive.
internet of things
The internet of things (IoT) refers to a network of interconnected physical devices, vehicles, appliances, and other objects...
separation filters
Three filters used in making a color print of a color negative, red, green and blue-violet, respectively. Each filter...
cyanometry
The analysis of light in the blue region of the visible spectrum.
quantum dot light-emitting diode
QLED stands for quantum dot light-emitting diode. QLED is a display technology that utilizes quantum dots, which are...
residual blue
The optical phenomenon in which white light dispersed by small particles in suspension appears blue when viewed through a...
mercury vapor light source
A lamp that has mercury in a tube or bulb that has first been evacuated. The electricity travels through the vapor between...
receiver primaries
Also known as display primaries. Colors formed by a television receiver that are of constant chromaticity and variable...
color-defective vision
Situation in which the observer requires fewer than three independent stimuli to make color matches. Dichromats require only...
hue
The perceptual term for that aspect of color described by words such as red, yellow or blue. Achromatic colors, such as...
anomaloscope
An optical instrument that uses a yellow light of varying intensity with red and blue lights of fixed intensity to test for...
back-illuminated CCD
A CCD that has been reduced in thickness by etching so that light passes through the back layers of the CCD. This type of...
thermography
Thermography is a technique that involves the use of an infrared imaging device, called a thermal camera or infrared camera,...
dichroic mirror
A dichroic mirror, also known as a dichroic beamsplitter or interference filter beamsplitter, is an optical device that...
electroluminescent display
The utilization of the light produced when electrical energy is directly converted into light within devices used for visual...
chromoendoscopy
A technique of using dyes during endoscopy to improve tissue differentiation. Dyes such as methylene blue, Toluidine blue...
atmospheric optics
The analysis of the properties of radiation, such as light, when acted upon by variations in the atmosphere. Blue and red...
hematoporphyrin derivative
A material used in photodynamic therapy that is retained selectively by tumor tissue when injected into the body; it then...
GaN distributed feedback lasers
GaN (Gallium Nitride) distributed feedback (DFB) lasers refer to a specific type of semiconductor laser based on Gallium...
color temperature meter
A device containing two photocells behind deep red and blue filters to measure color temperatures. The amplifier gain is...
cesium-antimonide photocathode
A photocathode that exhibits maximum sensitivity in the blue and ultraviolet regions of the spectrum. The sensitivity is...
trichromacy
The basis of color vision in the human eye. Three types of cones have been identified, each having a unique spectral...
dispersion
Dispersion refers to the phenomenon where different wavelengths (colors) of light travel at different speeds when passing...
cyanometer
An instrument designed to measure the proportion of light emitted by a source in the blue region of the spectrum.
fluorescent protein
Fluorescent proteins are proteins that exhibit the property of fluorescence, which is the ability to absorb light at a...
Mie scattering
Mie scattering, named after the German physicist Gustav Mie, refers to the scattering of electromagnetic radiation (such as...
nonspectral color
A color whose hue is not produced by a single wavelength in the visible spectrum, but is instead produced by mixing the...
effect filter
A color filter, generally used in photography, to emphasize certain color tones and to modify others in a picture for a more...
color facsimile transmission
The transmission of a color photograph by separating the colors into varying intensities of red, blue and green, and then...
shadow mask tube
A type of color-generating cathode-ray tube that uses a shadow mask, a thin perforated electrode, located close to the...
three-filter densities
Integral densities that are measured relative to arbitrarily selected red, green and blue filters.
phototherapy
Phototherapy is a medical treatment that involves the use of light to treat various conditions, particularly those related...
haze filter
A filter, used in photography, that absorbs the ultraviolet and extreme blue violet radiation scattered by atmospheric haze.
coumarin 314T
An efficient, readily soluble blue-green laser dye.
3D printing
3D printing, also known as additive manufacturing (AM), is a manufacturing process that builds three-dimensional objects...
beamsplitter
A beamsplitter is an optical device for dividing a beam into two or more separate beams. A simple beamsplitter may be a very...

(74 results found)

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