Pyrocam IV Operator’s Manual Document No. 50337-001 Rev F 2/21/2017 Page 10
CHAPTER 3 – SETUP AND OPERATION
3.1 Introduction
The Pyrocam can analyze both CW and Pulsed style lasers. Fitted with an appropriate lens,
the Pyrocam can continuously image high temperature thermal objects, or can capture
short-pulsed thermal events. The Pyrocam requires different setups depending upon the
specific application.
NOTE: This manual describes the operation of the Pyrocam IV with BeamGage
.
For other
methods of operation, please refer to CHAPTER 4.
3.2 Overview of Pyrocam Controls
All of the features for the Pyrocam IV are found in the BeamGage software. The panels
that are unique to the Pyrocam IV are shown and described below.
Chopped (CW) vs. Pulsed
To operate in Chopped (CW) mode, the Pyrocam employs a rotating chopper that can
operate at one of two different chopping rates, 25Hz and 50Hz. We recommend that you
always use the 50Hz rate in order to obtain a linear response. The 25Hz rate should only
be used in combination with higher gain and frame averaging to extract the very weakest
of images.
When operating in pulsed mode, the Pyrocam must be externally triggered. The Delay
setting should be set to 0µs (default) if the laser fires a few microseconds after the
trigger’s rising edge and if the pulse is at least tens of µs in length.
If the laser pulse is very short and/or occurs either simultaneous with the trigger’s rising
edge or before the trigger pulse’s rising edge, set the Delay to a negative value that will
insure the capture of the laser pulse prior to receiving the trigger.
The Rate value will indicate either the current chopper frequency or the input trigger
pulse rate in Hz.
Exposure Control
When operating in Pulsed mode, the Pyrocam must be externally triggered and the
Exposure control must be set to a value slightly larger (10-15%) than the laser’s pulse
width. (Not the trigger pulse length.) The exposure range is from 1 to 40,000µs.
NOTE: The Exposure control has no effect in chopped mode and there is no Auto setup
or Auto-X features for the Pyrocam.
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