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M E A S U R I N G   L I G H T (continued)

10. Key Word Index (F...L)
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In the text of the paragraphs, all keywords are enhanced by using KAPITAL LETTERS.

In the index, all items are sorted "naturally": don't search for "photometer, bunsen", but for "bunsen photometer".


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key word short description paragraph + hyperlink
far distance see point source 4.2.3 Radiant Intensity  I
far field in a distance very large compared to lamp length @ line source 6.2 Line Source and Distance
far field in a distance very large compared to source size 6.4 Distance and Illuminance: Overview
fc footcandle, seldom used unit for Illuminance  E;
= 10.76 lx
table 8.1 in
8. Comparison Tables
filter optical device: transmitting some wavelengths / rejecting others 4.4.2 Instruments (for spectral. resolv. meas.)
fine spectral resolution able to resolve laser lines 7.1 Monochromatism (of Laser Radiation)
fL footlambert, seldom used unit for Luminance  L;
= 3.43 cd/m^2
table 8.2.1 in
8. Comparison Tables
flat response wavelength-independent response of detector 4.0 Radiometry/General
flat response wavelength-independent response of detector 4.4.1 Why use Spectral Resolution?
flux power of electromagnetic wave 4.1.1 Radiant Flux  (Phi)
flux power of electromagnetic wave, here: weighted with V(lambda) 5.1.1 Luminous Flux  (Phi)
flux power of electromagnetic wave, here: weighted with V(lambda) 5.1.2 Quantity of Light  Q
flux power of electromagnetic wave, here: weighted with V(lambda) 5.2.3 Luminance  L
flux as a base unit easy for understanding 5.1.1 Luminous Flux  (Phi)
flux density flux per some spatial quantity 4.2.1 Radiant Exitance  M
flux from intensity standard definition of flux 5.1.1 Luminous Flux  (Phi)
flux per area (luminous flux per emitting area:) 5.2.1 Luminous Exitance  M
flux per area (luminous flux per receiving area:) 5.3.1 Illuminance  E
flux per area (radiant flux per emitting area:) 4.2.1 Radiant Exitance  M
flux per area (radiant flux per receiving area:) 4.3.1 Irradiance  E
focal length (monchromat.) property of monochromator 4.4.2 Instruments (for spectral. resolv. meas.)
footcandle seldom used unit for Illuminance  E ;
= 10.76 lx
table 8.1 in
8. Comparison Tables
footlambert seldom used unit for Luminance  L ;
= 3.43 cd/m^2
table 8.2.1 in
8. Comparison Tables
gloss reflection containing a specular component 4.3.3 Cosine Correction
gonio-radiometer measures flux as function of angle 4.2.3 Radiant Intensity  I
grating optical device: dispersing per wavelength-dependent diffraction 4.4.2 Instruments (for spectral. resolv. meas.)
Gray SI unit for absorbed dose of ionizing radiation 4.1.2 Radiant Energy  Q
grease-spot photometer example of ancient photometry 5.0 Photometry, General
H symbol for the quantity 'exposure' 5.3.2 Exposure  H
H symbol for the quantity 'radiant exposure' 4.3.2 Radiant Exposure  H
HMI-lamp special discharge lamp; example for working with spectra 4.4.3-Example
holographic grating like "grating", but produced as a hologram 4.4.2 Instruments (for spectral. resolv. meas.)
hood here: cover on detector aperture 4.3.3 Cosine Correction
I symbol for the quantity 'luminous intensity' 5.2.2 Luminous Intensity  I
I symbol for the quantity 'radiant intensity' 4.2.3 Radiant Intensity  I
Illuminance  E luminous flux per unit receiving area;
unit  lx = lm / m^2
5.3.1 Illuminance  E
illuminance meter Instrument for measuring illuminance  E 5.2.2 Luminous Intensity  I
illuminance meter Instrument for measuring illuminance  E 5.3.1 Illuminance  E
illuminance meter examples some instruments from different manufacturers 5.3.1 Illuminance  E
image sensor light detector with spatial resolution 4.2.4 Radiance  L
include here: include interference pattern into light amplitude measuremt 7.2 Coherence (of Laser Radiation)
index e indicating 'energetic' 4.0 Radiometry, General
index v indicating 'visual' 5.0 Photometry, General
indexes supplied 4 types of indexes for easy access to single paragraphs 1. Goals of this Essay
inexpensive instrument enhancing availability of illuminance meters 5.3.1 Illuminance  E
infinite source size source much larger than detector aperture and detector distance 6.3 Area Source and Distance
instantaneous spectroradiometer spectroradiometer that measures all bands in one instant 4.4.2 Instruments (for spectral. resolv. meas.)
integrate numerically calculate the area that is under the diagram of a table 4.4.3 Applying Spectral Resolution
integrating instrument for measuring transient events of radiation 4.1.2 Radiant Energy  Q
integrating sphere white ball in which radiation of all directions is collected 4.2.1 Radiant Exitance  M
Intensity see 'luminous intensity' 5.2.2 Luminous Intensity  I
Intensity see 'radiant intensity' 4.2.3 Radiant Intensity  I
interference fringes spatially periodic interference pattern 7.2 Coherence (of Laser Radiation)
interference pattern spatial light amplitude distribution caused by interference 7.2 Coherence (of Laser Radiation)
intermediate distance (pi) rad  >>  (source field angle)  >>  0 rad 4.2.4 Radiance  L
interpolation inserting intermediate values mathematically 6.4 Distance and Illuminance: Overview
inverse distance (linear) law near-field function for Illuminance around line source 6.2 Line Source and Distance
inverse distance squared law function for illuminance around point source 6.1 Point Source and Distance
Irradiance  E radiant flux per unit receiving area; unit  W / m^2 4.3.1 Irradiance  E
isotropic radiation pattern same intensity at all angles 4.2.3 Radiant Intensity  I
Joule SI unit for (radiant) energy 4.1.2 Radiant Energy  Q
Joule per square meter SI unit for Radiant Exposure  H 4.3.2 Radiant Exposure  H
K = luminous efficacy of radiation
(eye spectral sensitivity)
4.4.3-Example
5.0 Photometry, general
L Lambert, seldom used unit for Luminance  L ;
= [10^4/(pi)] * cd/m^2
table 8.2.1 in
8. Comparison Tables
L = Lv, symbol for the quantity 'luminance' 5.2.3 Luminance  L
L = Le, symbol for the quantity 'radiance' 4.2.4 Radiance  L
Lambert seldom used unit for Luminance  L ;
= [10^4/(pi)] * cd/m^2
table 8.2.1 in
8. Comparison Tables
lambertian name for surfaces without gloss, without specular reflection 4.3.3 Cosine Correction
line source light source with discernible length 6.2 Line Source and Distance
lm lumen, SI unit for Luminous Flux  (Phi) 2. Introduction
lm lumen, SI unit for Luminous Flux  (Phi) 5.1.1 Luminous Flux  (Phi)
lm lumen, SI unit for Luminous Flux  (Phi) table 8.1 in
8. Comparison Tables
lm s Lumen second, SI unit for Quantity of Light  Q 5.1.2 Quantity of Light  Q
lm/sr defining candela 5.2.2 Luminous Intensity  I
lumen SI unit for Luminous Flux  (Phi) 2. Introduction
lumen SI unit for Luminous Flux  (Phi) 5.1.1 Luminous Flux  (Phi)
lumen SI unit for Luminous Flux  (Phi) table 8.1 in
8. Comparison Tables
lumen per steradian defining candela 5.2.2 Luminous Intensity  I
lumen*second SI unit for Quantity of Light  Q 5.1.2 Quantity of Light  Q
Luminance  L luminous intensity per unit emitting area 5.2.3 Luminance  L
luminous efficacy
of radiation
human eye spectral sensitivity characteristics (absolute) 4.4.3-Example
5.0 Photometry, general
luminous emittance = luminous exitance  M 5.2.1 Luminous Exitance  M
Luminous Energy  Q = Quantity of Light 5.1.2 Quantity of Light  Q
luminous exitance  M luminous flux per unit emitting area 5.2.1 Luminous Exitance  M
luminous exposure  H luminous flux times time per unit receiving area 5.3.2 Luminous Exposure H
Luminous Flux  (Phi) Radiant Flux weighted with the eye's spectral luminous efficiency 5.1.1 Luminous Flux  (Phi)
luminous flux per solid angle defining luminous intensity  I 5.2.2 Luminous Intensity  I
luminous from radiant flux relation photometry/radiometry 5.1.1 Luminous Flux  (Phi)
luminous incidance = Illuminance  E 5.3.1 Illuminance  E
luminous intensity  I luminous flux per unit solid angle; unit  cd = lm / sr 5.2.2 Luminous Intensity  I
luminous intensity  I luminous flux per unit solid angle; unit  cd = lm / sr 5.2.3 Luminance  L
Lux SI unit for Illuminance  E ;
= 1 lm / m^2
5.3.1 Illuminance  E
Lux SI unit for Illuminance  E ;
= 1 lm / m^2
table 8.1 in
8. Comparison Tables
lux examples measured values and prescribed values from literature 5.3.1 Illuminance  E
luxmeter see "illuminance meter" 5.2.2 Luminous Intensity  I
luxmeter see "illuminance meter" 5.3.1 Illuminance  E
luxmeter examples see "illuminance meter examples" 5.3.1 Illuminance  E
Lux-Seconds SI unit for Exposure  H 5.3.2 Exposure  H
lx = Lux, SI unit for Illuminance  E ;
= 1 lm / m^2
5.3.1 Illuminance  E
lx = Lux, SI unit for Illuminance  E ;
= 1 lm / m^2
table 8.1 in
8. Comparison Tables



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