LIGHTING DEVICE AND IMAGING DEVICE COMPRISING SUCH A LIGHTING DEVICE

12. A lighting device comprising a lighting module including an optical output configured to emit a light beam having an angular spread is disclosed. The module has a light source configured to generate the light beam and an optical diffuser arranged to receive and diffuse the beam towards the optic...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	AUTRAN, Frederic
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING NON-PORTABLE LIGHTING DEVICES OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SYSTEMS THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	12. A lighting device comprising a lighting module including an optical output configured to emit a light beam having an angular spread is disclosed. The module has a light source configured to generate the light beam and an optical diffuser arranged to receive and diffuse the beam towards the optical output, such that the downstream value (θ2) is greater than the upstream value (θ1) of the angular spread. A control module emits a control signal having an alarm value when the value of the angular spread of the light beam emitted by the optical output passes below a first threshold, the control module comprising a photoreceptor optically coupled to the optical output and configured to measure a light intensity. The control module outputs the control signal having the alarm value when the value of the light intensity falls below a second threshold. A control circuit deactivates the light source upon reception of the control signal having the alarm value.