Provided is a wavelength converting composite member including: a disk-shaped substrate; a first wavelength converting member provided on the substrate and containing a first phosphor that radiates fluorescence due to a parity-forbidden transition; and a second wavelength converting member provided on the substrate and containing a second phosphor that radiates fluorescence due to a parity-allowed transition. The first wavelength converting member and the second wavelength converting member are disposed adjacent to each other along the circumferential direction of the substrate. The first wavelength converting member and the second wavelength converting member are provided on the substrate in such a way that the position of the center of gravity of the entirety of the first wavelength converting member and the second wavelength converting member is located on the rotation axis of the substrate. A light emitting device is provided with the wavelength converting composite member.

A lighting device is provided. The lighting device includes: a lighting unit in which a plurality of light sources are mounted; a lighting cover installed to be spaced apart from the lighting unit; and a reflective sheet arranged on a light source mounting surface of the lighting unit and reflecting reflected light reflected from the lighting cover back toward the lighting cover, wherein wavelength conversion layer for converting a wavelength of the reflected light reflected from the lighting cover is laminated on the reflective sheet.

An optical device includes a metal reflective layer substantially made of a metal material, a first light transmissive layer disposed on the metal reflective layer, an optical multilayer reflective film disposed on the first light transmissive layer and including a plurality of sublayers stacked on each other and having different refractive indexes, and a wavelength converting layer disposed on the optical multilayer reflective film and containing a fluorescent material capable of absorbing incident excitation light and generating fluorescent light having a lower energy. The wavelength converting layer is capable of generating mixed light containing the excitation light and the fluorescent light in response to irradiation with the excitation light.

An optical device includes a metal reflective layer substantially made of a metal material, a first light transmissive layer disposed on the metal reflective layer, an optical multilayer reflective film disposed on the first light transmissive layer and including a plurality of sublayers stacked on each other and having different refractive indexes, and a wavelength converting layer disposed on the optical multilayer reflective film and containing a fluorescent material capable of absorbing incident excitation light and generating fluorescent light having a lower energy. The wavelength converting layer is capable of generating mixed light containing the excitation light and the fluorescent light in response to irradiation with the excitation light.

Provided is a wavelength converting composite member including: a disk-shaped substrate; a first wavelength converting member provided on the substrate and containing a first phosphor that radiates fluorescence due to a parity-forbidden transition; and a second wavelength converting member provided on the substrate and containing a second phosphor that radiates fluorescence due to a parity-allowed transition. The first wavelength converting member and the second wavelength converting member are disposed adjacent to each other along the circumferential direction of the substrate. The first wavelength converting member and the second wavelength converting member are provided on the substrate in such a way that the position of the center of gravity of the entirety of the first wavelength converting member and the second wavelength converting member is located on the rotation axis of the substrate. A light emitting device is provided with the wavelength converting composite member.

This disclosure discloses an illumination apparatus. The illumination apparatus comprises a cover comprising a second portion and a first portion, and a light source disposed within the cover. An average thickness of the first portion is greater than that of the second portion.

An illumination module includes a light mixing cavity with an interior surface area and window that are physically separated from an LED. A portion of the window is coated with a first wavelength converting material and a portion of the interior surface area is coated with a second wavelength converting material. The window may be coated with LuAG:Ce. The window may also be coated with a third wavelength converting material with a peak emission wavelength between 615-655 nm where the spectral response of light emitted from the window is within 20% of a blackbody radiator at the same CCT. The LED may emit a light that is converted by the light mixing cavity with a color conversion efficiency ratio greater than 130 lm/W where the light mixing cavity includes two photo-luminescent materials with a peak emission wavelengths between 508-528 nm and 615-655 nm.

An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of luminescence materials provide a predetermined range of illumination wavelengths in the output. The remote light converting appliances may be provided as frustoconical elements within frustoconical reflective cavities with a void between the light converting appliances and the associated LEDs.

A lighting device is disclosed with excitation light source(s) for emitting excitation light along an excitation light path; a wavelength conversion assembly including wavelength conversion element(s) for converting the excitation light into conversion light and emitting it into the same half-space from which the excitation light is radiated onto the surface of the element, and reflection element(s) for reflecting, in unconverted fashion, the excitation light intermittently radiated onto the reflection element from the source(s) along the portion of the excitation light path onto a reflection light path as reflection light; and a dichroic mirror for deflecting the excitation light coming from the source(s) onto the portion of the excitation light path on which the excitation light is radiated onto the wavelength conversion element(s) or the reflection element(s). The mirror is configured such that the conversion light is transmitted through the mirror and the reflection light is guided past the mirror.

A light source apparatus according to the present disclosure includes: a plurality of light sources; a plurality of collimator lenses that outputs, as parallel light, divergent light from each of the plurality of light sources; a diffuser plate that diffuses output light from each of the plurality of collimator lenses; a fly-eye lens having a plurality of lens cells, and in which the output light from each of the plurality of collimator lenses enters each of the plurality of lens cells through the diffuser plate; a fluorescence emission section having a phosphor face; and a condenser optical system that condenses output light from each of the plurality of lens cells of the fly-eye lens toward the phosphor face.