User`s manual

doc-3331-2 OverView cDG67-DL (August 2003) 3-6
3.5 Princip le of Dual Lamp System
The dual lamp system implemented in OverView cDG67-DL is based on a lamp lift which moves
the respective lamp in front of the stationary optics.
The lamps are moveable
The optics is stationary
The following identies apply:
Lamp Top == L1
Lamp Bottom == L2
The lift is the carrier of the lamps and can have two positions: lift up and lift down.
If the lift is in the
down position,
the top lamp (Lamp1,
L1, Lamp Top) is coupling light into the optical system (P)
If the lift is in the
up position,
the bottom lamp (Lamp2,
L2, Lamp Bottom) is coupling light into the optical system (P)
L1
L2
P
L1
L2
P
Liftposition
down
up
Figure 3-4
Lift positions
Since there are two lamps, the dual lamp system can have four states:
L1 on, L2 on,
L1 on, L2 off,
L1 off, L2 on
,
L1 off, L2 off
L1
L2
L1
L2
L1
L2
L1
L2
Figure 3-5
Lamp states