Review of Short Phrases and Links|
This Review contains major "Illuminance"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- Illuminance is the total amount of visible light illuminating (incident upon) a point on a surface from all directions above the surface.
- Illuminance is a measure of how much luminous flux is spread over a given area.
- Illuminance is a measure of photometric flux per unit area, or visible flux density.
- Illuminance is the total luminous flux incident on a surface, per unit area.
- Illuminance is the intensity or degree to which something is illuminated and is therefore not the amount of light produced by the light source.
- At the center of the illumination pattern of the lens, the illuminance is seven times that of the lamp alone.
- The numerically calculated angular intensity distribution from a light source is converted to an illuminance distribution on the entrance pupil.
- Definition: Illuminance is the amount of light falling upon a given area.
- Alternatively, it can be defined as the illuminance on a 1-square foot surface of which there is a uniformly distributed flux of one lumen.
- Footcandle (fc) A unit of illuminance or light falling onto a surface.
- The illuminance is a measure for the luminous flux density on a surface.
- Therefore, the lumen value is not as important as the Illuminance value, which is a measure of intensity from a given direction.
- The density of incident luminous flux on a surface; illuminance is the standard metric for lighting levels, and is measured in lux (lx) or footcandles (fc).
- Illuminance is the density of the luminous flux incident on a surface.
- The voltage is converted by a precision AD converter into a signal that is proportional to the expected illuminance in lux.
- A source that is farther away provides less illumination than one that is close, so one lux is less illuminance than one footcandle.
- Find the illuminance and the luminous intensity at a distance of 1 m, and at 5 m.
- If one unit of illuminance falls upon this hypothetical reflector, then 1 unit of luminance is reflected.
- Footcandles is a unit of measurement of illuminance (how much light is striking a point on a surface).
- A given amount of light will illuminate a surface more dimly if it is spread over a larger area, so illuminance is inversely proportional to area.
- Illuminance A measure of the amount of light incident on a surface; measured in foot-candles or Lux.
- The footcandle (or lumen per square foot) is a non-SI unit of illuminance.
- Footcandle (fc) A unit of illuminance equal to one lumen per square foot.
- A flux of 1000 lumens, concentrated into an area of one square meter, lights up that square meter with an illuminance of 1000 lux.
- A Lux is a lumen per square meter, which we might call illumination in street jive, but illuminance in sci.optics talk.
- S.I. unit of illuminance equal to 1 lumen per square meter.
- In photometry, illuminance is the total luminous flux incident on a surface, per unit area.
- The illumination (illuminance) is measured in luminous flux per unit area.
- A phot is a photometric unit of illuminance, or luminous flux through an area.
- Lighting a larger area to the same illuminance requires a proportionately greater number of lumens.
- However, the same 1,000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.
- Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent light fixture with an output of 12,000 lumens.
- A single fluorescent light fixture that produces a luminous flux of 12000 lumens might light a residential kitchen with an illuminance of 500 lux.
- The lux (symbol: lx) is the SI unit of illuminance and luminous emittance measuring luminous power per area.
- In SI derived units, these are both measured in lux (lx) or lumens per square metre (cd·sr·m −2). In the CGS system, the unit of illuminance is the phot.
- A flux of 1,000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1,000 lux.
- For real diffuse reflectors, the ratio of luminance to illuminance in these units is roughly equal to the reflectance of the surface.
- Optics > Light > Photometry > Luminous Flux
- Square Meter
- Thought > Observation > Area > Square Foot
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