Fluke Ti40 User Manual

5-2 

Image alignment is an automatic adjustment that occurs as you focus the 
infrared camera lens. The visible light image and the infrared image are lined 
up based on the focusing distance of the infrared lens so that they may be 
combined for viewing and analysis. The visible light image and the infrared 
image are lined up for distances greater than 50 cm (approximately 2 ft). 

Prior to capturing images using the visible light module and IR Fusion, it is 
important to make sure the target object is in focus. As you rotate the infrared 
(IR) lens to focus the camera, if the IR blend is less than 50%, the IR Fusion 
blend level changes to 50% infrared and 50% visible light (VL). Once you 
have the target object in focus and stop rotating the IR lens, the IR Fusion level 
returns to your setting. You can focus the infrared portion of the image only; 
the focus of the VL portion is set at the factory.  

To focus the camera, remove the IR lens cap, point the lens at the target, and 
manually rotate the infrared lens with your finger. Focus by aligning the edges 
of the IR and VL images. 

You can change the IR Fusion blend level from full infrared (IR) to full visible 
light (VL) or some combination in between. When the IR Fusion blend level is 
set to full IR, 100% of the image is IR. When the IR Fusion blend level is set 
to full VL, 100% of the image is VL. When the IR Fusion blend level is set 
somewhere in the middle of full IR and full VL, an appropriate amount of the 
image is IR and an appropriate amount is VL, thus displaying a fused—or 
blended—image. 

To adjust the IR-VL Fusion blend level using the level & span button and 
mouse controller: 

1.  Press and hold G until the IR Fusion level dialog box appears near the 

bottom of the screen.