IFM Electronic, S.L. - Optical position sensors (OPS)

Fotocélulas Laser: for the detection of tiny objects

Picture of Fotocélulas Laser
The systems laser use in applications in which it is necessary to detect small objects or where is necessary a detection of positions of extreme precision.

The light laser is composed by luminous waves of identical length that present between himself a fixed relation of phase (coherence). Of here it proceeds one of the most important characteristics of the fotocélulas laser: the do of light almost parallel. Like consequence, thanks to the small angle of divergence can carry out applications with big scopes of until 60 metres.

The point laser of clear visibility, even to the daylight, facilitates the alineación of the system.

Apart from his advantages, for the election of an optical system adapted also is necessary to take into account other appearances: compared with the fotocélulas standard, the fotocélulas laser have of a rank of temperature more reduced (-10...+40 °C).

The useful life is only of 50.000 hours. Basically the systems laser also are more expensive that the fotocélulas normal with red light. Because of the luminous point of small size and near at hand often wide, these systems are more sensitive to the vibrations that the fotocélulas standard.

Some of his technical characteristics of the fotocélulas laser are: detection of tiny objects thanks to the do of light focused, red light of big visibility for an adjust simple with the object, adjust automatic of the point of conmutación by means of button pulsador, available special sensors for specific applications and components of fixation for an adjust precise.