C
ELLIPTICAL OPTICS
PERFORMANCE iN LIGHTING elliptical optics are circular but differ from roto-
symmetrical circular optics because the opening of the light beam on planes
α and β is symmetric, but differs greatly between the two.
The light distribution is highly elliptical.
EXAMPLE
Elliptical optic code: E α x β
where:
E = Elliptical
α = Opening of the light beam on plane α expressed in degrees
β = Opening of the light beam on plane β expressed in degrees
For example: E 10°x45°
CIRCULAR OPTICS
PERFORMANCE iN LIGHTING identifies those optics that generate a luminous
emission with a symmetry of revolution about the A axis as circular optics.
The opening angle of the beam is generally constant in all planes.
The reflectors generating these optics generally have a circular opening.
EXAMPLE
Circular optic code: C/xx
where:
C = Circular
xx = the abbreviated name of the opening angle
For example: C/I - C/M - C/IW - C/MW -C/EW
Multiple optics within the same range of opening will be distinguished by
inserting
the numerical value of the beam opening at the end.
For example: C/IW46 - C/IW50
Circular optic name
Mandatory
indications
Additional
indications
Type of optic
Type of opening
Opening angle α
I
0° ÷ 20°
M
21° ÷ 45°
IW
46° ÷ 60°
MW
61° ÷ 75°
EW
over 75°
IDENTIFYING AND CLASSIFYING THE OPTICS
GRAZING REFLECTOR OPTICS
Grazing reflector optics stand out for their luminous emission that is typically
parallel (grazing) to the installation surface (wall or ground).
These optics are primarily used for architectural lighting with the purpose of
designing patterns of light and they rarely have a functional use.
A fundamental characteristic is the value of the α angle that identifies the
value of the light beam aperture measured on the installation surface.
Installation
surface
(wall)
Installation
surface
(ground)
XXXII
ELL |
R |
C |
