Light-emitting device for detecting passage or smoke and method for manufacturing such a device

摘要

A light-emitting device to detect passage or smoke in the emitted beam. The device includes a source of invisible radiation, a source of visible laser radiation, an alignment component to align the central axis of the visible radiation with an axis parallel to the central axis of the invisible radiation, and a switch to turn off the visible laser source. The device can further include a housing containing both sources of radiation. The switch is configured to be controlled by the closing of the housing and the source of visible laser radiation is turned off in response to the closure of the housing.

主权项

1. Light-emitting device for detecting passage or smoke in the emitted beam, comprising:
a source of invisible radiation; a source of visible laser radiation; an alignment component to align a central axis of the visible laser radiation with a reference axis parallel to a central axis of the invisible radiation; a switch to turn off the source of the visible laser radiation; and a housing to house the two radiation sources and the switch configured to control an activation of the source of the visible laser radiation in response to an opening of the housing and to control the turn off of the source of visible laser radiation in response to a closure of the housing.