Access control device
OwnerGerd Reimeinventor
Life of this patent
Estimating the term…
Abstract
“A control device or a method monitors access of at least one body or one person to an access area, the device comprising at least one emitting element that emits light radiation into the access area, at least one receiving element that receives the light radiation, and at least one means which generates a diffused light field that emits the light radiation, which is emitted into the access area, in the form of a planar light field, where on the receive side, a detection element for the diffused detection of the light field and a transferring means for transferring the light detected in a diffused manner to the receiving element are provided.”
Claims34
-34. (canceled)
A monitoring device for a space that is to be monitored for entry of at least one body via an access area comprising:
- at least one emitting element which introduces luminous radiation into the access area;
- and
- at least one receiving element which receives the luminous radiation,
- wherein at least one light guide is associated with the emitting element, said light guide emitting the luminous radiation into the access area as a diffuse planar light field transversely to a longitudinal direction of the at least one light guide;
- and
- wherein at a receiving end at least one light guide is provided as detecting element for detecting the diffuse light field transversely to the longitudinal direction of the at least one light guide and as transmitting means for transmitting the light out of the light field to the receiving element.
A method of monitoring an access area to a space which is to be monitored for the entry of at least one body by emitting luminous radiation by means of at least one emitting element which introduces luminous radiation into the access area and at least one receiving element which receives the luminous radiation, the method comprising:
- producing at least one planar light field which is emitted diffusely from a light guide transversely to its longitudinal direction into the access area;
- detecting the diffuse light field at the receiving end through a light guide also transversely to its longitudinal direction;
- and
- transmitting the diffusely detected light to the receiving element within the light guide.
Dependencies are inferred from the claim text.