US 11,237,467 B2Granted

Light synthesizing device

AssigneeNichia Corporation

InventorSoichiro Miura

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Abstract

A light synthesizing device includes first and second light emitting devices, first and second polarization control members, and a synthesis member. Each of the first and second light emitting devices has at least one first semiconductor laser element and at least one second semiconductor laser element, and configured such that a polarization direction of exit light from the first semiconductor laser element is different from a polarization direction of exit light from the second semiconductor laser element. The first and second polarization control members are respectively configured to change the polarization directions of the exit lights from the first semiconductor laser element of the first light emitting device and the second semiconductor laser element of the second light emitting device. The synthesis member is configured to combine light exited from the first light emitting device and light exited from the second light emitting device.

Claims19

Dependent claims

A light synthesizing device comprising:

a first light emitting device and a second light emitting device each having at least one first semiconductor laser element and at least one second semiconductor laser element, the first light emitting device being configured such that a polarization direction of exit light from the at least one first semiconductor laser element that has exited the first light emitting device is different from a polarization direction of exit light from the at least one second semiconductor laser element that has exited the first light emitting device;
a first polarization control member configured to change the polarization direction of the exit light from the first semiconductor laser element of the first light emitting device;
a second polarization control member configured to change the polarization direction of the exit light from the second semiconductor laser element of the second light emitting device;
and
a synthesis member configured to combine light exited from the first light emitting device including the exit light from the at least one first semiconductor laser element of the first light emitting device whose polarization direction has been changed by the first polarization control member, and light exited from the second light emitting device including the exit light from the at least one second semiconductor laser element of the second light emitting device whose polarization direction has been changed by the second polarization control member.

2 more elements

A light synthesizing device comprising:

a first light emitting device and a second light emitting device each having at least one first semiconductor laser element and at least one second semiconductor laser element, each of the first light emitting device and the second light emitting device being configured such that a polarization direction of exit light from the at least one first semiconductor laser element that has exited a corresponding one of the first light emitting device and the second light emitting device is different from a polarization direction of exit light from the at least one second semiconductor laser element that has exited the corresponding one of the first light emitting device and the second light emitting device;
a first polarization control member configured to change the polarization direction of the exit light from the first semiconductor laser element of the first light emitting device;
a second polarization control member configured to change the polarization direction of the exit light from the second semiconductor laser element of the second light emitting device;
and
a synthesis member configured to combine light exited from the first light emitting device including the exit light from the at least one first semiconductor laser element of the first light emitting device whose polarization direction has been changed by the first polarization control member, and light exited from the second light emitting device including the exit light from the at least one second semiconductor laser element of the second light emitting device whose polarization direction has been changed by the second polarization control member, wherein
the first polarization control member is configured to change the polarization direction of the exit light from the at least one first semiconductor laser element of the first light emitting device to the same polarization direction of the exit light from the at least one second semiconductor laser element of the first light emitting device, and
the second polarization control member is configured to change the polarization direction of the exit light emitted from the at least one second semiconductor laser element of the second light emitting device to the same polarization direction of the exit light from the at least one first semiconductor laser element of the second light emitting device.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/655,652Filed 17 Oct 2019
Priority: JP JP2018-19918623 Oct 2018
Published: US 2020/0124953 A123 Apr 2020
Granted: 1 Feb 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

G03B 21/2033
Characterised by the light source: lED or laser light sources
G02B 5/3083
Polarising elements: birefringent or phase retarding elements
G02B 19/0014
Having refractive surfaces only: at least one surface having optical power
G02B 19/0052
For use with a light source: the light source comprising a laser diode