Thermal
Imagers
Primary and Secondary Triggers
13
Primary and Secondary Triggers
The two-part trigger is located in the standard trigger position for a pistol-grip
device. The larger, green trigger is the primary trigger. The smaller, black
trigger is the secondary trigger.
In normal operation, the function of the primary trigger is to capture a thermal
image for possible storage to memory by the user.
The secondary trigger operates the LaserSharp™ Auto Focus System and
laser pointer. See page 32 for information about how to enable and disable the
LaserSharp™ Auto Focus System.
Focus
The Imager uses the LaserSharp Auto Focus System and an advanced manual
focus system. Correct focus is important in all imaging applications. Correct
focus makes sure that the infrared energy is correctly directed onto the pixels of
the detector. Without correct focus, the thermal image can be blurry and the
radiometric data may be inaccurate. Out-of-focus infrared images are frequently
unusable or of little value.
The LaserSharp Auto Focus System, only from Fluke, uses a precision-
adjusted and aligned laser pointer to indicate the area of focus. To focus with
the LaserSharp Auto Focus System, depress the secondary (black) trigger on
the Imager handle. Aim the laser pointer at the target. When satisfied with the
location of the laser pointer, release the trigger. The system automatically,
rapidly, and reliably focuses on the precise point where the laser was aimed.
Note
•
The user can enable and disable the LaserSharp Auto Focus
System.
•
The laser pointer is aligned parallel to the infrared lens. If using
AutoBlend Mode, the laser pointer dot will always be positioned
just above the center point marker on the LCD display. However,
it is easier to use your eyes to locate the visible laser pointer on
the object under inspection.
To focus with the advanced manual focus system, place finger on the
electronically-driven focus wheel control and rotate the control until the
inspection object is in proper focus.
