KEYENCE’s laser displacement sensors enable non-contact measurement of a target’s height, position, or distance. By pairing multiple sensors, measurements such as thickness and width can also be performed. High-accuracy displacement sensors can be grouped into two categories: confocal and laser triangulation. The laser emits a laser beam to the target as shown above. The light reflected off the target is concentrated by the receiver lens and forms an image on the light receiving element. When the distance changes, the concentrated light reflects at a different angle and the position of the image changes accordingly.
A laser sensor is an electric device that uses a focused light beam to detect the presence, absence, or distance of an object. The light that a laser sensor emits is a small bright dot, similar to a laser pointer. This dot is bright enough to be easily seen even in direct sunlight. Laser sensors are considered as photoelectric sensors, but they use a laser light beam to detect the object or even its exact distance. The light of this type of sensor can be a point (point laser) or linearly (line laser).
Laser distance sensors are designed for non-contact distance measurements: laser gauges for measuring ranges up to 10m, laser distance sensors for up to 270m. These sensors are used for positioning and type classification in machine building and handling equipment. Based on the laser safety requirements specified in IEC60825-1 and FDA (CDRH) 21CFR Part 1040.10, KEYENCE laser markers are classified as Class 4/ Class IV Laser Products.
