US 2016/0109627 A1 · PROJECTION APPARATUS

Abstract

A projection apparatus of the present disclosure includes a light-emitting element for emitting excitation light, a wavelength converter for receiving the excitation light, converting the excitation light into light of a different wavelength, and emitting the converted light as radiation light, and an optical filter for receiving the radiation light. The optical filter reflects long-wavelength light of wavelengths longer than wavelengths of the radiation light. With this configuration, the optical filter reflects long-wavelength light of wavelengths longer than wavelengths of the radiation light, thus being able to prevent the wavelength converter from being irradiated with long-wavelength light, and being able to prevent deterioration of the wavelength converter.

Claims14

Dependent claims

A projection apparatus comprising:

a light-emitting element configured to emit excitation light;
a wavelength converter configured to receive the excitation light, convert the excitation light into light of a different wavelength, and emit the converted light as radiation light;
and
an optical filter configured to receive the radiation light and reflect long-wavelength light of wavelengths longer than wavelengths of the radiation light.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/975,667Filed 18 Dec 2015

Priority

JP 2013-1404544 Jul 2013

Published

21 Apr 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

G02B 5/26
Filters: reflecting filters
F21S 41/16
Characterised by the type of light source: laser light sources
F21S 41/176
Characterised by the type of light source: light sources where the light is generated by photoluminescent material spaced from a primary light…
F21S 41/24
Characterised by refractors, transparent cover plates, light guides or filters: light guides

Projection apparatus

Life of this patent

Projection apparatus

Life of this patent

Abstract

Claims14