Defini�on of terms
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3. Frequently used terms
Term
Defini�on
LED projector
An op�cal device that uses an internal light source (LED) to display a two-dimensional tem-
plate (gobo) on an image surface.
LED
L
ight
E
mi�ng
D
iode
Semiconductor component that emits light.
Gobo
Projec�on mo�f
A glass template used to display logos, pa�erns, texts or images with a projector.
Projec�on lens
A projector’s most important component. One or more op�cal lenses concentrate the light,
making it possible to project an image onto a surface.
Focal length
This is a measure of how strongly the lens concentrates beams of light.
Short focal length: wide light beam.
Long focal length: narrow, concentrated light beam.
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