Illumination modules and optoelectronic systems
Assigneeams Sensors Singapore Pte. Ltd.
InventorsMai-Lan Elodie Boytard, Philipp Müller, Martin Lukas Balimann
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Abstract
An illumination module for generating a patterned illumination with minimal ambiguity includes an array of light sources having different respective near-field intensity profiles. The illumination module also includes an optical assembly. The optical assembly and the array of light sources can be operable to substantially replicate the different respective near-field intensity profiles of the light sources in the far-field thereby generating a patterned illumination. The patterned illumination can exhibit reduced ambiguity in some instances.
Claims17
An illumination module for generating a patterned illumination, the illumination module comprising:
- an array of light sources having a common emission plane, each light source generating light having a near-field intensity profile at the common emission plane;
- the array of light sources comprising at least two light sources having different respective near-field intensity profiles at the common emission plane, and the at least two light sources having different respective near-field intensity profiles being operable to generate light having the same wavelength and/or range of wavelengths;
- and
- an optical assembly mounted at a distance from the common emission plane, the optical assembly and the array of light sources being operable to substantially replicate the different respective near-field intensity profiles of the at least two light sources in a far-field, the optical assembly being a microlens array, the microlens array including a plurality of microlenses respectively arranged at a microlens pitch,
- wherein the microlens pitch is substantially equal to the square root of the product of the integer two divided by an integer greater than or equal to one, the wavelength and/or range of wavelengths, and the distance.
An optoelectronic system operable to generate three-dimensional data, the optoelectronic system comprising:
- an illumination module for generating a patterned illumination;
- and
- an imager configured to operably capture and/or collect light reflected from the patterned illumination generated by the illumination module;
- wherein the illumination module includes
- an array of light sources having a common emission plane, each light source generating light having a near-field intensity profile at the common emission plane, the array of light sources respectively arranged at a light-source pitch, the array of light sources including at least two light sources having different respective near-field intensity profiles at the common emission plane, the at least two light sources having different respective near-field intensity profiles being operable to generate light having the same wavelength and/or range of wavelengths, and
- a microlens array mounted at a distance from the common emission plane, the microlens array including a plurality of microlenses respectively arranged at a microlens pitch, the microlens array, the distance, and the array of light sources being operable to substantially replicate the different respective near-field intensity profiles of the at least two light sources in a far-field,
- wherein the microlens pitch is substantially equal to the square root of the product of the integer two divided by an integer greater than or equal to one, the wavelength and/or range of wavelengths, and the distance.
Dependencies are inferred from the claim text.