Laser Thermometer

First of all, it must be made clear that the measurement of temperatures with infrared devices is completely independent of laser light. The laser light itself is not necessary for accurate temperature measurement. The various types of laser sighting systems are designed to enable the best possible alignment of a measuring device to the object being measured.

Laser Thermometer with Single point Laser
Simple, cost-effective handheld laser thermometers utilize a single-beam laser pointer to indicate the center of the measuring spot usually with a certain amount of parallax error. Here it is up to the user to estimate the size of the measuring spot based on the measuring spot diagram and the distance.

Laser Thermometer with Dual Laser
In a dual laser system, two laser beams are emitted from the circumference of the IR-lens to approximately depict the narrowing (in shorter distances) or widening of the measuring beam in larger distances. The diameter of the measuring spot is indicated utilizing the distance between the two laser points on its circumference.

Laser Thermometer with Crosshair Sight
With one Laser Line aligned to the optical center of an IR device and a second laser line perpendicular to the first one but also aligned to the optical center a crosshair mark is projected to the target. This approach shows any distance between the center of the measurement spot at the object.
By making the higher effort to use 4 Laser sources and line generators and shaping the 4 laser lines to a certain length a Crosshair can be projected onto the target showing in addition to the center the correct diameter of the measurement spot in any distance

Laser Thermometer with Adjustable Focus
In near-infrared applications where lens materials are used which are transparent for visible light too (glass, sapphire, etc.), the already existing optical system can be used to illuminate the real spot size on the measurement target by laser or LED light. This will also work for focusable optic systems. If the laser uses the same optics the illuminated spot size will adapt to the IR-Focus spot size