# Samenvatting Lighting Technology

234 Flashcards en notities
1 Studenten

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• ## 1 Light and Radiation

• Qph
Energy of a photon
• h
Planck's constant 6.626 *10^-34 Ws
• The propagation speed in a medium is dependent on ...
the refractive index n
• Optical radiation ranges from ...nm to ...nm
1nm - 1000 nm
• ## 2.1 Transition from radiometric to photometric quantities

• Xe; where does the e stand for?
energy -> indicates that this is a radiometric quantity
• What is the relative sensitivity
Relative to a reference wavelength [lambda0]
• What is the maximal eye sensitivity for photopic and scotopic vision?
p: 555nm s: 507nm
• What follows an additivity theorem so that the transition from a spectral power distribution of a radiometric quantity follows a function?
Brightness perception
• ## 2.2 Photometric quantities

• Illuminance (symbol)
E in lux=lm/m2
• Cylindrical illuminance
Ez
• Semicylindrical illuminance
Esc
• A planar angle is formed..
by two rays originating in the same point called vertex
• A solid angle is formed by ...
a bundle of rays originating in the same point forming an area
• Luminous intensity (symbol)
I in candela [cd] = lm/sr -- used to characterize the distribution of a lamp
• Luminance (Symbol)
L in cd/m2 -- impacts brigtness perception
• Luminous existance
M in lm/m2
• Luminous energy
Q in lms or lmh
• Luminous exposure
H in lxs or lxh
• ## 2.3 Photon quantities

• Eph
Energy of one photon
Ep
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### Laatst toegevoegde flashcards

110
Mo,i: initial luminous flux exitance
Mj: light received from other patches
109
When taking into account the obstruction of each point on Ai towards each point on Aj
108
Form factor from patch i to patch j
107
Form factor of finite patch i to differential patch j
106
The form factor between a differential patch area to a finite area
105
The differential luminous flux leaving dAi towards dAj (two infinitely small areas)
104
Form factor between two areas Ai and Aj defined as the luminous flux O|ij from Ai->Aj. o|i is the luminous flux incident on Ai
103
Light output ratio Nlb and the utilance nr are often combined to utilization factor nb
102
Zonal cavity method
nR,K: utilance of a reference surface ratio of luminous flux hitting this surface to the total luminous flux provided by the n luminaires in the room
101
The direct illuminance caused by the luminaire can be calculated by the superposition of the contributions of each partial luminaire