Multispectral harmonisation device intended for aligning the optical channels of an optronic system
AssigneeSafran Electronics & Defense
InventorArnaud DAVENEL
Life of this patent
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Abstract
A multispectral harmonisation device intended to align the optical channels of an optronic system that includes at least two directional optical sources emitting respective optical beams of various wavelengths belonging to various spectral bands and comprises a parabolic mirror and means for positioning and orienting each of the optical sources so that each of the optical beams emitted by the optical sources passes through the optical focus of the parabolic mirror before being reflected by said parabolic mirror so that all the optical beams form, by reflection on the parabolic mirror, a multispectral collimated beam.
Claims11
Multispectral harmonisation device intended to align the optical channels of an optronic system and comprising at least two directional optical sources emitting respective optical beams of various wavelengths belonging to various spectral bands,
- wherein said multispectral harmonisation device further comprises a parabolic mirror and means for positioning and orienting each of the optical sources so that each of the optical beams emitted by said optical sources passes through the optical focus of the parabolic mirror before being reflected by said parabolic mirror so that all the optical beams form, by reflection on the parabolic mirror, a multispectral collimated beam,
- and in that the positioning and orientation means comprise an alignment mask consisting of an opaque wall and comprising a hole, said alignment mask being placed in a plane orthogonal to the optical axis of the parabolic mirror so that the location of the hole corresponds to the optical focus of the parabolic mirror.
A method for positioning and orienting at least two optical sources of a multispectral harmonisation device, said sources emitting respective optical beams of various wavelengths belonging to various spectral bands, characterised in that said positioning and orientation method comprises, for each of the optical sources, the steps of:
- installing an optical detector sensitive to the emission wavelength of said optical source to be positioned and oriented;
- adjusting the position and the orientation of the optical source so that the optical beam emitted by said source is directed towards the parabolic mirror and passes through a hole pierced in an alignment mask, the alignment mask consisting of an opaque wall comprising the hole and being placed in a plane orthogonal to the optical axis of the parabolic mirror, the hole being located at the optical focus of said parabolic mirror;
- detecting, by the optical detector sensitive to the emission wavelength of the optical source, an optical signal at said emission wavelength of the optical source, characteristic of the optical beam coming from said optical source that has passed through the hole, and generating information representing the detection.
Dependencies are inferred from the claim text.