SYSTEMS, DEVICES, AND METHODS FOR FOCUSING LASER PROJECTORS
First Claim
1. A laser projector comprising:
- a laser module to provide laser light, the laser module comprising;
a first laser diode to provide a first laser light, wherein the laser light provided by the laser module includes at least the first laser light; and
a first collimation lens positioned in an optical path of the first laser light, the first collimation lens to receive the first laser light and at least reduce a divergence of the first laser light; and
a convergence lens positioned downstream from the laser module in an optical path of the laser light, the convergence lens to receive the laser light from the laser module and converge the laser light to a focus outside of the projector.
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Accused Products
Abstract
Systems, devices, and methods for focusing laser projectors are described. A laser projector includes N≧1 laser diodes, each of which emits laser light having a divergence. Each laser diode is paired with a respective primary or collimation lens to at least reduce a divergence of the laser light that the laser diode produces. Downstream from the primary lens(es) in the optical path(s) of the laser light, a single dedicated secondary or convergence lens converges the laser light to a focus. By initiating the convergence of the laser light at the secondary or convergence lens as opposed to at the primary or collimation lens(es), numerous benefits that are particularly advantageous in laser projection-based wearable heads-up displays are realized.
110 Citations
20 Claims
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1. A laser projector comprising:
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a laser module to provide laser light, the laser module comprising; a first laser diode to provide a first laser light, wherein the laser light provided by the laser module includes at least the first laser light; and a first collimation lens positioned in an optical path of the first laser light, the first collimation lens to receive the first laser light and at least reduce a divergence of the first laser light; and a convergence lens positioned downstream from the laser module in an optical path of the laser light, the convergence lens to receive the laser light from the laser module and converge the laser light to a focus outside of the projector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wearable heads-up display comprising:
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a support structure that in use is worn on a head of a user; a holographic combiner carried by the support structure, wherein the holographic combiner is positioned within a field of view of an eye of the user when the support structure is worn on the head of the user; and a laser projector carried by the support structure and positioned and oriented to direct laser light towards the holographic combiner, wherein the laser projector comprises; at least one laser diode to provide laser light; at least one collimation lens positioned in an optical path of the laser light, the at least one collimation lens to receive the laser light and at least reduce a divergence of the laser light; and a convergence lens positioned downstream from the at least one collimation lens in the optical path of the laser light, the convergence lens to receive the laser light having at least reduced divergence from the at least one collimation lens and converge the laser light to a focus in between the laser projector and the holographic combiner. - View Dependent Claims (11, 12)
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13. A laser projector comprising:
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a set of N laser diodes, where N≧
1, each laser diode in the set of N laser diodes to provide a respective laser light having a divergence;a set of N primary lenses, each primary lens in the set of N primary lenses positioned and oriented to receive a respective laser light from a respective one of the N laser diodes and each primary lens in the set of N primary lenses positioned and oriented to at least reduce the divergence of a respective laser light from a respective one of the N laser diodes; a combiner positioned and oriented to receive each respective laser light having at least reduced divergence from each respective one of the N primary lenses and combine each respective laser light having at least reduced divergence from each respective one of the N primary lenses into an aggregate laser light; and a secondary lens positioned and oriented to receive the aggregate laser light from the combiner and converge the aggregate laser light to a focus outside of the laser projector. - View Dependent Claims (14, 15, 16, 17)
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18. A method of focusing a laser light provided by a laser projector, wherein the laser projector includes a laser module having at least one laser diode, the method comprising:
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providing the laser light by the laser module of the laser projector, wherein the laser light has a divergence; at least reducing the divergence of the laser light by at least one collimation lens; and converging the laser light to a focus by a convergence lens positioned downstream from the at least one collimation lens in an optical path of the laser light, wherein the focus is positioned outside of the laser projector. - View Dependent Claims (19, 20)
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Specification