User Manual: UM50589-EN
Optica 20 series
Revision: 4.0
Date of release: 2019-01-23
13/20
www.vareximaging.com
C.
Scale division for indicating the field size compared to the SID.
To set the required field size, the SID is needed (one option is to use the built-in measuring tape).
Follow the applicable curve which indicates the determined SID. The desired field size is set once the
pointer (attached to the knob) intersects the SID-curve combined with the field-size curve. See
pictures above for clarification.
NOTE:
Take into account that a read inaccuracy can occur since it is an approximate and optical
read-out.
D.
Push button for activating laser line for Bucky alignment (optional feature).
The laser will be activated for a pre-defined time and will switch off automatically. Push the
button for ±2 seconds to switch off the laser. A green indication LED will light inside the button.
Pay attention! In case the collimator is not equipped with a laser, this push button function is
not available.
E.
Push button for light field indicator, a green indication LED will light inside the button.
The light will be activated for a pre-defined time and will switch off automatically. Push the
button for ±2 seconds to switch off the light field.
