Back to results
US 12,224,551 B2Granted
Laser package and projector with the laser package
AssigneesOSRAM Opto Semiconductors GmbH, Lumus Ltd.
InventorsYochay Danziger, Ann Russell
Life of this patent
Estimating the term…
Abstract
A laser device comprises a plurality of laser diodes, each laser diode emitting a light beam having a fast axis and a slow axis and a beam direction; and one or more optical components configured to modify a divergence of the light beams in a fast axis plane and/or in a slow axis plane such that the light beams have a same focal plane in the fast axis plane and in the slow axis plane.
Claims19
A laser device, comprising:
- a laser package comprising a plurality of laser diodes, each laser diode emitting a light beam having a fast axis and a slow axis and a beam direction, wherein the light beams of all laser diodes of the laser package are emitted from the laser package as a pattern;
- and
- one or more optical components configured to modify a divergence of the light beams in a fast axis plane and/or in a slow axis plane such that the light beams have a same focal plane in the fast axis plane and in the slow axis plane,
- wherein the laser diodes are mounted on one or more submounts,
- wherein the one or more submounts are arranged vertically on a base,
- wherein the one or more optical components comprise at least one cylindrical lens and a lens array,
- wherein the at least one cylindrical lens is assigned to at least two laser diodes,
- wherein the lens array comprises a plurality of convergent cylindrical microlenses arranged next to each other along a direction in the fast axis plane,
- wherein for the pattern of the light beams emitted from the laser package a minimum aperture in the fast axis plane and a minimum aperture in the slow axis plane overlap,
- wherein the minimum aperture in the fast axis plane denotes, along the fast axis, a minimum beam size of a superposition of the light beams of all laser diodes and the minimum aperture in the slow axis plane denotes, along the slow axis, a minimum beam size of a superposition of the light beams of all laser diodes, and
- wherein, at an output surface of the lens array, the light beam of at least one laser diode is tilted in the fast axis plane with respect to the light beam of another of the laser diodes at the output surface of the lens array and/or with respect to an optical axis of the assigned microlens.
8 more elements
A projector comprising a laser device and a scanning mirror,
- wherein the laser device comprises:
- a laser package comprising a plurality of laser diodes, each laser diode emitting a light beam having a fast axis and a slow axis and a beam direction, wherein the light beams of all laser diodes of the laser package are emitted from the laser package as a pattern of at least 2×2 light beams;
- and
- one or more optical components configured to modify a divergence of the light beams in a fast axis plane and/or in a slow axis plane such that the light beams have a same focal plane in the fast axis plane and in the slow axis plane,
- wherein the laser diodes are mounted on one or more submounts,
- wherein the one or more submounts are arranged vertically on a base,
- wherein the one or more optical components comprise at least one cylindrical lens and a lens array,
- wherein the at least one cylindrical lens of the one or more optical components is assigned to all laser diodes of the laser device,
- wherein the lens array comprises a plurality of cylindrical microlenses,
- wherein for the pattern of the at least 2×2 light beams emitted from the laser package a minimum aperture in the fast axis plane and a minimum aperture in the slow axis plane overlap,
- wherein the minimum aperture in the fast axis plane denotes, along the fast axis, a minimum beam size of a superposition of the light beams of all laser diodes and the minimum aperture in the slow axis plane denotes, along the slow axis, a minimum beam size of a superposition of the light beams of all laser diodes, and
- wherein the scanning mirror is placed at the position of the overlapping apertures.
9 more elements
A laser device, comprising:
- a laser package comprising a plurality of laser diodes, each laser diode emitting a light beam having a fast axis and a slow axis and a beam direction, wherein the light beams of all laser diodes of the laser package are emitted from the laser package as a pattern;
- and
- one or more optical components configured to modify a divergence of the light beams in a fast axis plane and/or in a slow axis plane such that the light beams have a same focal plane in the fast axis plane and in the slow axis plane,
- wherein the laser diodes are mounted on one or more submounts,
- wherein the one or more submounts are arranged vertically on a base,
- wherein the laser diodes and submounts are placed at different relative angles with respect to a central parallel prism,
- wherein the one or more optical components comprise two cylindrical lenses or at least one cylindrical lens and a lens array,
- wherein at least one cylindrical lens of the one or more optical components is assigned to at least two laser diodes,
- wherein for the pattern of the light beams emitted from the laser package a minimum aperture in the fast axis plane and a minimum aperture in the slow axis plane overlap, and
- wherein the minimum aperture in the fast axis plane denotes, along the fast axis, a minimum beam size of a superposition of the light beams of all laser diodes and the minimum aperture in the slow axis plane denotes, along the slow axis, a minimum beam size of a superposition of the light beams of all laser diodes.
7 more elements
Dependencies are inferred from the claim text.