US 12,066,753 B2
Light source apparatus and projector
Tomoko Akagawa, Matsumoto (JP); Tetsuo Shimizu, Matsumoto (JP); Shoichi Uchiyama, Shimosuwa-machi (JP); Chigusa Takagi, Azumino (JP); and Ryota Tatsumi, Chino (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 28, 2023, as Appl. No. 18/191,058.
Claims priority of application No. 2022-052360 (JP), filed on Mar. 28, 2022.
Prior Publication US 2023/0305377 A1, Sep. 28, 2023
Int. Cl. G03B 21/20 (2006.01)
CPC G03B 21/204 (2013.01) 18 Claims
OG exemplary drawing
 
1. A light source apparatus comprising:
a first laser light emitter configured to emit first light having a first wavelength band;
a wavelength converter configured to convert the first light into second light having a second wavelength band different from the first wavelength band;
a base including a first support part that supports the first laser light emitter and a second support part that supports the wavelength converter; and
a first optical element disposed in an optical path of the first light between the first laser light emitter and the wavelength converter and configured to guide the first light emitted from the first laser light emitter to the wavelength converter,
wherein the first optical element has
a first light incident surface which faces the first laser light emitter and on which the first light emitted from the first laser light emitter is incident,
a first reflection surface configured to reflect the first light emitted from the first light incident surface and deflect the optical path of the first light, and
a first light exiting surface which faces the wavelength converter and via which the first light reflected off the first reflection surface exits toward the wavelength converter,
the first light incident surface, the first reflection surface, and the first light exiting surface intersect with each other,
the wavelength converter includes a wavelength conversion layer that converts the first light into the second light and a reflection layer provided at an opposite side to the first optical element with respect to the wavelength conversion layer, and
the wavelength converter emits the second light toward the first optical element.