Seiko Epson Corporation

Shigeo Nojima

Masahiro Fujii

Taro Takekoshi

Ryoichi Nozawa

Akira Egawa

Daisuke Uchikawa

Hiroyuki Ishikawa

Hiroyuki Maruyama

Yasushi Karasawa

Masatoshi Yonekubo

Akira Miyamae

Kazuhiko Sato

Koji Kitahara

Akihiro Kashiwagi

Tomohiro Makigaki

Takashi Takeda

Yujiro Nomura

Tetsuo Shimizu

Tetsuro Yamazaki

Atsushi Yamaji

Hidemitsu Sorimachi

A wavelength conversion element according to an aspect of the present disclosure includes a substrate having a reflection surface, a wavelength converter that has a first surface on which excitation light that belongs to a first wavelength band is incident, a second surface located at a side opposite the first surface, and a third surface that intersects the first or second surface and converts the excitation light in terms of wavelength into fluorescence that belongs to a second wavelength band different from the first wavelength band, a holder that is so provided as to face the first or third surface and holds the wavelength converter in the direction along the direction in which the excitation light is incident and in a direction that intersects the light incident direction, and a fixer that fixes the holder.

Wavelength conversion element, illuminator, and projector

A wavelength conversion element according to the present disclosure includes a base member having a reflecting surface, a wavelength conversion section having a first surface which excitation light in a first wavelength band enters, and a second surface opposed to the base member, and configured to perform a wavelength conversion on the excitation light into fluorescence in a second wavelength band, a holding section configured to hold the wavelength conversion section to the base member, and an air layer disposed in one of a space surrounded by a first recessed part provided to the base member so as to be opposed to the second surface of the wavelength conversion section and the second surface of the wavelength conversion section, and a space surrounded by a second recessed part provided to the wavelength conversion section so as to be opposed to the reflecting surface of the base member and the reflecting surface of the base member, wherein in the first surface, at least a part of a portion opposed to the reflecting surface and the air layer is set as an incident area of the excitation light.

Wavelength conversion element, illumination device, and projector

A wavelength conversion element according to an aspect of the invention includes a base having a reflection surface, a wavelength conversion section that has a first surface on which excitation light is incident and a second surface facing away from the first surface and converts the excitation light in terms of wavelength into fluorescence, and a bonding section that bonds the wavelength conversion section to the base. Bonding the wavelength conversion section to the base via the bonding section with the reflection surface and the second surface separate from each other provides an air layer in part of the space between the reflection surface and the second surface, and at least part of a portion of the first surface that is the portion facing the air layer is a light incident area on which the excitation light is incident.

Wavelength conversion element, method for manufacturing wavelength conversion element, illuminator, and projector

A wavelength conversion element includes a substrate, a reflecting section disposed on one surface side of the substrate, a wavelength conversion layer disposed on an opposite side of the reflecting section to the substrate, and emitting fluorescence in response to irradiation with excitation light, and a reflecting surface disposed between a surface of the wavelength conversion layer on an opposite side to the reflecting section and the reflecting section, and adapted to totally reflect light having been input at an angle no smaller than a critical angle out of the fluorescence.

Wavelength conversion element, light source device, and projector

A diffractive optics element includes a substrate configured of a sapphire substrate and a diffractive optics structure, provided on the substrate, that forms an image when a laser beam is incident thereon. The diffractive optics structure has a diffractive optics portion, and the diffractive optics portion has a base material and a diffractive optics layer disposed on the base material. The thickness of the base material is no greater than 20 &#x3bc;m.

Diffractive optics element, method for manufacturing diffractive optics element, and electronic device

A projector includes a light source device, a diffraction element that converts light from the light source device into 0-th order light and diffracted light, a light modulation device that modulates the diffracted light so as to form image light, and a projection optical system that emits projected light having a chief ray which is tilted with respect to an optical axis of the image light incident from the light modulation device. Defining a reference plane as a plane which is perpendicular to a plane including the optical axis and a chief ray of the projected light and includes the optical axis, a plane including an optical axis of the 0-th order light and a chief ray of the diffracted light intersects the reference plane.

Projector with tilt projection

A fluorescent light emitting element includes a substrate; a phosphor layer that is provided on the substrate; an adhesive layer that is provided between the substrate and the phosphor layer; and a reflection unit that is provided between the adhesive layer and the substrate or between the adhesive layer and the phosphor layer. The phosphor layer is formed of a sintered body made of a cerium-activated garnet structure phosphor containing 0.05 atm % cerium, and a thickness of the phosphor layer is in a range of 100 &#x3bc;m to 250 &#x3bc;m.

Fluorescent light emitting element and projector

A wavelength conversion element includes a phosphor layer that includes phosphors and a binder. The thickness of a phosphor region obtained by multiplying the thickness of the phosphor layer by the volume concentration of the phosphor is equal to or larger than 15 &#x3bc;m.

A wavelength conversion element includes a substrate, and a fluorescent material layer disposed on the substrate. The volume concentration of the fluorescent material in the fluorescent material layer is equal to or higher than 15 vol %.

A scanning image display system which includes a plurality of scanning image displays each including a light source adapted to emit a laser beam, and a scan unit having a first scan section adapted to scan the laser beam emitted from the light source in a first direction on a projection surface, and a second scan section adapted to scan the laser beam in a second direction substantially perpendicular to the first direction. The first scan sections are resonant scan sections which are faster than the second scan sections in scan speed. The first scan sections are heated with light during the time that an image is formed and a reset period of the second scan sections in order to control resonant frequencies of the first scan sections.

Scanning image display system and scanning image display

A scanning device includes: an optical element in which a refractive index distribution changes according to the intensity of an electric field generated therein such that an incident laser beam is scanned; first and second electrodes provided on two opposite surfaces of the optical element; and a control unit that controls a voltage applied to at least one of the first and second electrodes such that the electric field is generated in one direction and the other direction opposite to the one direction with time in the optical element.

Scanning device and scanning type optical apparatus

An electro-optic element includes an electro-optic crystal having a birefringent property, and in which a refractive index distribution is generated in accordance with an intensity of an electric field caused inside, a pair of intensity modulating electrodes for applying a voltage for varying the birefringent property of the electro-optic crystal, a pair of scanning electrodes for applying a voltage for varying the refractive index distribution of the electro-optic crystal, and a polarization selection member provided at least on a side of a laser beam emission end face out of a laser beam entrance end face and the laser beam emission end face of the electro-optic crystal, and for selectively transmitting a part with a specific vibration direction out of a light beam emitted from the electro-optic crystal.

Electro-optic element and scanning optical device

An electro optic device includes an optical element in which a refractive index distribution, changes according to the intensity of an electric field generated therein such that an incident laser beam is scanned. First and second electrodes are provided on two opposite surfaces of the optical element. A distance between electrodes of the first and second electrodes of the optical element decreases continuously or in a stepwise manner from an emission end surface toward an incident end surface.

Electro optic device, method of manufacturing electro optic device, and scanning type optical apparatus

An electro-optical element includes an optical element that scans a laser beam made incident thereon when a refractive index distribution changes according to a size of an electric field generated in the inside of the electro-optical element and a first electrode and a second electrode arranged on two surfaces of the optical element opposed, to each other. At least one of the first electrode and the second electrode is a transparent electrode.

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Suwa, Japan

Shigeo Nojima