Faster access than browser!
40 relations: Angle, Apostilb, Brightness, Candela, Candela per square metre, Centimetre–gram–second system of units, CRC Press, Derivative, Diffuse reflection, Etendue, Foot-lambert, Geometrical optics, Glare (vision), Human eye, Illuminance, Infinitesimal, International System of Units, Invariant (physics), Lambert (unit), Lambert's cosine law, Lambertian reflectance, Light, Lightness, Luma (video), Lumen (unit), Luminance meter, Luminous flux, Luminous intensity, Normal (geometry), Orders of magnitude (luminance), Photometry (optics), Pupil, Radiance, Reflectance, Refractive index, Solid angle, Square metre, Steradian, Stilb (unit), Subtended angle.
Angle
In plane geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
New!!: Luminance and Angle · See more »
Apostilb
The apostilb is an old unit of luminance, which was withdrawn from use in 1978.
New!!: Luminance and Apostilb · See more »
Brightness
Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light.
New!!: Luminance and Brightness · See more »
Candela
The candela (or; symbol: cd) is the base unit of luminous intensity in the International System of Units (SI); that is, luminous power per unit solid angle emitted by a point light source in a particular direction.
New!!: Luminance and Candela · See more »
Candela per square metre
The candela per square metre (cd/m2) is the derived SI unit of luminance.
New!!: Luminance and Candela per square metre · See more »
Centimetre–gram–second system of units
The centimetre–gram–second system of units (abbreviated CGS or cgs) is a variant of the metric system based on the centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time.
New!!: Luminance and Centimetre–gram–second system of units · See more »
CRC Press
The CRC Press, LLC is a publishing group based in the United States that specializes in producing technical books.
New!!: Luminance and CRC Press · See more »
Derivative
The derivative of a function of a real variable measures the sensitivity to change of the function value (output value) with respect to a change in its argument (input value).
New!!: Luminance and Derivative · See more »
Diffuse reflection
Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle as in the case of specular reflection.
New!!: Luminance and Diffuse reflection · See more »
Etendue
Etendue or étendue is a property of light in an optical system, which characterizes how "spread out" the light is in area and angle.
New!!: Luminance and Etendue · See more »
Foot-lambert
A foot-lambert or footlambert (fL, sometimes fl or ft-L) is a unit of luminance in United States customary units and some other unit systems.
New!!: Luminance and Foot-lambert · See more »
Geometrical optics
Geometrical optics, or ray optics, describes light propagation in terms of rays.
New!!: Luminance and Geometrical optics · See more »
Glare (vision)
Glare is difficulty seeing in the presence of bright light such as direct or reflected sunlight or artificial light such as car headlamps at night.
New!!: Luminance and Glare (vision) · See more »
Human eye
The human eye is an organ which reacts to light and pressure.
New!!: Luminance and Human eye · See more »
Illuminance
In photometry, illuminance is the total luminous flux incident on a surface, per unit area.
New!!: Luminance and Illuminance · See more »
Infinitesimal
In mathematics, infinitesimals are things so small that there is no way to measure them.
New!!: Luminance and Infinitesimal · See more »
International System of Units
The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.
New!!: Luminance and International System of Units · See more »
Invariant (physics)
In mathematics and theoretical physics, an invariant is a property of a system which remains unchanged under some transformation.
New!!: Luminance and Invariant (physics) · See more »
Lambert (unit)
The lambert (symbol L, la or Lb) is a non-SI unit of luminance named for Johann Heinrich Lambert (1728–1777), a Swiss mathematician, physicist and astronomer.
New!!: Luminance and Lambert (unit) · See more »
Lambert's cosine law
In optics, Lambert's cosine law says that the radiant intensity or luminous intensity observed from an ideal diffusely reflecting surface or ideal diffuse radiator is directly proportional to the cosine of the angle θ between the direction of the incident light and the surface normal.
New!!: Luminance and Lambert's cosine law · See more »
Lambertian reflectance
Lambertian reflectance is the property that defines an ideal "matte" or diffusely reflecting surface.
New!!: Luminance and Lambertian reflectance · See more »
Light
Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.
New!!: Luminance and Light · See more »
Lightness
In colorimetry and color theory, lightness, also known as value or tone, is a representation of variation in the perception of a color or color space's brightness.
New!!: Luminance and Lightness · See more »
Luma (video)
In video, luma represents the brightness in an image (the "black-and-white" or achromatic portion of the image).
New!!: Luminance and Luma (video) · See more »
Lumen (unit)
The lumen (symbol: lm) is the SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source.
New!!: Luminance and Lumen (unit) · See more »
Luminance meter
A luminance meter is a device used in photometry that can measure the luminance in a particular direction and with a particular solid angle.
New!!: Luminance and Luminance meter · See more »
Luminous flux
In photometry, luminous flux or luminous power is the measure of the perceived power of light.
New!!: Luminance and Luminous flux · See more »
Luminous intensity
In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye.
New!!: Luminance and Luminous intensity · See more »
Normal (geometry)
In geometry, a normal is an object such as a line or vector that is perpendicular to a given object.
New!!: Luminance and Normal (geometry) · See more »
Orders of magnitude (luminance)
This page lists examples of luminances, measured in candelas per square metre and grouped by order of magnitude.
New!!: Luminance and Orders of magnitude (luminance) · See more »
Photometry (optics)
Photometry is the science of the measurement of light, in terms of its perceived brightness to the human eye.
New!!: Luminance and Photometry (optics) · See more »
Pupil
The pupil is a hole located in the center of the iris of the eye that allows light to strike the retina.
New!!: Luminance and Pupil · See more »
Radiance
In radiometry, radiance is the radiant flux emitted, reflected, transmitted or received by a given surface, per unit solid angle per unit projected area.
New!!: Luminance and Radiance · See more »
Reflectance
Reflectance of the surface of a material is its effectiveness in reflecting radiant energy.
New!!: Luminance and Reflectance · See more »
Refractive index
In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.
New!!: Luminance and Refractive index · See more »
Solid angle
In geometry, a solid angle (symbol) is a measure of the amount of the field of view from some particular point that a given object covers.
New!!: Luminance and Solid angle · See more »
Square metre
The square metre (International spelling as used by the International Bureau of Weights and Measures) or square meter (American spelling) is the SI derived unit of area, with symbol m2 (Unicode character). It is the area of a square whose sides measure exactly one metre.
New!!: Luminance and Square metre · See more »
Steradian
No description.
New!!: Luminance and Steradian · See more »
Stilb (unit)
The stilb (sb) is the CGS unit of luminance for objects that are not self-luminous.
New!!: Luminance and Stilb (unit) · See more »
Subtended angle
In geometry, an angle subtended by an arc, line segment, or other curve is one whose two rays pass through the endpoints of the arc.
New!!: Luminance and Subtended angle · See more »
Redirects here:
Cd/m², Luminance factor, Photometric brightness.
References
[1] https://en.wikipedia.org/wiki/Luminance
