Fundamentals of light - Lecture 1 Flashcards
1
Q
Definition of light
A
“Visually perceived radiant power”
2
Q
What are rods and cones?
A
Rods
- Scotopic vision, low light levels. Not color
Cones
- Photopic vision, higher light levels. For color vision
Both:
- Receptors in the retina
3
Q
The four components of vision:
A
Light source
Modifier
Receiver
Interpreter
4
Q
Factors of visibility
A
- Task size
- Contrast
- Luminance
- Speed or time
- Age
5
Q
Distribution of rods and cones
A
More rods in the whole retina –> higher density than cones.
However, no rods in the fovea
No rods && cones in the blindspot
6
Q
Ranges of eye sensitivity curves:
A
Photopic: 0.5 cd/m2
Scotopic: 0.005 cd/m2
Mesopic: 0.5 - 0.005 cd/m2
7
Q
Luminous flux
A
Lumen
8
Q
Luminous effeciacy
A
Lm/W
9
Q
Luminous intensity
A
I, in Candela (cd)
10
Q
Illuminance
A
E, in lux
11
Q
Luminance
A
L in cd/m2
