write a report on laser thermometer in 500 words
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An infrared thermometer is a thermometer which infers temperature from a portion of the thermal radiation sometimes called black-body radiation emitted by the object being measured. They are sometimes called laser thermometers as a laser is used to help aim the thermometer, or non-contact thermometers or temperature guns, to describe the device's ability to measure temperature from a distance. By knowing the amount of infrared energy emitted by the object and its emissivity, the object's temperature can often be determined within a certain range of its actual temperature. Infrared thermometers are a subset of devices known as "thermal radiation thermometers".Examples of use
Some typical circumstances are where the object to be measured is moving; where the object is surrounded by an electromagnetic field, as in induction heating; where the object is contained in a vacuum or another controlled atmosphere; or in applications where a fast response is required, the accurate surface temperature is desired or the object temperature is above the recommended use point for contact sensors, or contact with a sensor would mar the object or the sensor, or introduce a significant temperature gradient on the object's surface.At times of epidemics of diseases causing fever, such as SARS coronavirus and Ebola virus disease, infrared thermometers have been used to check arriving travelers for fever.[
There are many varieties of infrared temperature-sensing devices, both for portable and handheld use and as fixed installations.
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LASER THERMOMETER
Sight technologies enable the precise application of infrared temperature measurement devices. Simple, cost-effective handheld laser thermometers utilize a single-point laser pointer in order to indicate the center of the measuring spot with a certain amount of parallax error. Here it is left to the user to estimate the size of the measuring spot by means of the measuring spot diagram and the distance. If the measurement object only captures a part of the measuring spot, the measured temperature will be represented as the mean value between the hot and cold surface areas of the measuring spot. With small measurement objects in particular, this can lead to the distortion of the measurement result, meaning potentially critical situations are not recognized. In order to properly display the measuring spot in its full size, laser thermometers with optical sights were developed which use crosshairs to mark the size, thus allowing for precise targeting.
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