Traditionally, portable infrared cameras have laser pointers that are not aligned with any measurement spot on their display. Parallax error resulting from the laser and infrared camera having distinct lens systems prevents the spot from being properly aligned at any distance. As a result, the spot projected onto objects in the field and visible to the camera operator and other onlookers is not normally associated with a temperature reading on the portable infrared camera's display.

*U.S. Patent No. 7,820,967