Andor Technology Neo sCMOS, Руководство по оборудованию

Страница: 42 / 86

FEATURES & FUNCTIONALITY
Neo
SECTION 2
Page 42
2.7 - TRIGGERING
The Neo camera has the following triggering modes:
•
In Internal Trigger the camera determines the exact time when an exposure happens based on the
acquisition settings entered by the user. This is the most basic trigger mode and requires no external
intervention.
•
In External Trigger, once an acquisition sequence has been started, the camera is placed into a
special cleaning cycle called “Pre-Scan Read out Cycle” which ensures that charge build up on the
CMOS sensor is kept to a minimum while waiting for the external trigger event. The Pre-Scan Read Out
Cycle consists of repeatedly reading a virtual row from the sensor. Once the external trigger is received,
a new exposure phase is initiated. The external trigger is fed via the EXT input on the I/O Connector on
the camera head.
•
Software Trigger works in the same manner to External Trigger mode whereby the camera and
software are in a high state of readiness and can react extremely quickly to a trigger event issued via
software. This mode is particularly useful when the user needs to control other equipment between
each exposure and does not know in advance how long such control will take or if the time taken
changes randomly.
•
External Start is a mode where the camera will wait for one external trigger event to occur after the
acquisition sequence has been started. Once this external trigger event is detected, the camera will
start the Internal Trigger read out process and will progress as if the camera was in internal trigger
mode.
•
External Exposure Trigger is a mode of operation where the exposure time and cycle time can be
controlled by the external trigger input.