Display unit for conversion of a laser beam into visible and incoherent light
AssigneeCommissariat a l'Energie Atomique
InventorAndre LeBihan
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Abstract
A display unit with the conversion of a laser beam into visible and incoherent light. The unit includes an optical waveguide which transmits a laser beam and at least one element for converting the laser beam into visible and incoherent light which faces the optical waveguide. It also includes at least one security or safety element, which faces the conversion element, which is transparent to the visible and incoherent light and which is able to stop the residual laser beam which may emerge from the conversion element. Accordingly, the visible and incoherent light can be observed through the safety element. The unit may be used with electric signs and markings.
Claims12
Display unit, characterized in that it comprises:
- an optical waveguide for transmitting a laser beam,
- at least one element for converting the laser beam into visible and incoherent light, said conversion element being placed in front of the optical waveguide and
- at least one safety element placed in front of the said conversion element and which is transparent to the visible and incoherent light and able to stop the residual laser beam liable to emerge from the conversion element,
- so that the visible and incoherent light can be observed through the safety element.
Dependencies are inferred from the claim text.