Precautions for reflected light

When there is a shiny floor or wall which is parallel to the optical axis, the reflected light on that surface enters the receiver as shown in the above figure, even if it is blocked on the optical axis, it may cause erroneous operation. As a countermeasure in this case, select a model with narrow directivity or adjust the sensitivity of the receiver to prevent it.

Note) In addition to the above, you can also use slits, pinholes, hoods, etc. to prevent reflected light.

When detecting an object with high surface gloss, use a model with a polarizing filter to prevent erroneous operation due to the reflected light from the object. The following measures are required when using a general model.

[Countermeasure]
In order to avoid the influence of the reflected light from the target object, set it at an appropriate angle up and down or left and right, not from the side of the target object (upper figure).

When using a reflective type photoelectric sensor, if there is a wall behind the target object, the reflected light from the wall may enter the projector / receiver device and cause a malfunction. We recommend using a range-finding reflection type or distance-limited reflection type model, that is not affected by the background. When using a general model, the following measures are required.

When used by directly attaching to the machine stand, the unnecessary reflected light may enter the light receiver unit. Separately, provide a mounting base to change the mounting height of the photoelectric sensor.