Seiko Epson Corporation

Junichi Okamoto

Akira Egawa

Takashi Miyata

Koichi Kobayashi

Yoshitaka Itoh

Masashi Kanai

Satoshi Kinoshita

Hiroyasu Kaseya

Fumika Sumiyama

Takashi Hagino

Yoji Kitano

A semiconductor laser including: a first mirror layer; a second mirror layer; an active layer, a current confinement layer, a first region, and a second region, in which the first mirror layer, the second mirror layer, the active layer, the current confinement layer, the first region, and the second region constitute a laminated body, the first region and the second region constitute an oxidized region of the laminated body, in a plan view, the laminated body includes a first part, a second part, and a third part disposed between the first part and the second part and resonating light generated in the active layer, and in a plan view, at least at a part of the third part, W&#x3e;Wand W&#x3e;W, Wis a width of the oxidized region of the first part, Wis a width of the oxidized region of the second part, and Wis a width of the oxidized region of the third part.

Semiconductor laser and atomic oscillator

There is provided a semiconductor laser including: a first mirror layer; a second mirror layer; an active layer; a current confinement layer; a first region including a plurality of first oxidized layers; and a second region including a plurality of second oxidized layers, in which, in a plan view, the laminated body includes a first part including the first region and the second region, a second part including the first region and the second region, and a third part disposed between the first part and the second part and resonating light generated in the active layer, the third part includes a fourth part including the first region and the second region and having a first groove, a fifth part including the first region and the second region and having a second groove, and a sixth part disposed between the fourth part and the fifth part and sandwiched between the first part and the second part, in a plan view.

A liquid droplet discharging apparatus includes: a first piezoelectric element that moves a head in a first direction; a second piezoelectric element that moves the head in a second direction opposite to the first direction; a movement unit that moves a medium in the first direction in accordance with a predetermined target movement amount; a transport amount measurement unit as a movement amount measurement unit that measures a movement amount of the medium in the first direction; and a drive control unit that controls driving of the first piezoelectric element and the second piezoelectric element. The drive control unit drives either one of the first piezoelectric element or the second piezoelectric element according to a difference B&#x2212;A between a target transport amount A as the target movement amount and a transport amount B as the movement amount measured from the transport amount measurement unit.

Liquid droplet discharging apparatus having movement correction

A robot includes two links, a joint portion that connects the two links so as to be rotatable relative to each other, a control unit that controls an operation of the joint portion, and an optical transmission device that transmits an optical signal between the two links, and in which the optical transmission device includes an optical wiring that passes through the joint portion and allows the optical signal to propagate, and a light source unit that is disposed on one of the two links and emits the optical signal, and the control unit transmits a signal for adjusting intensity of the optical signal according to a bending amount of the joint portion to the optical transmission device.

Robot and optical transmission device

An optical connection device includes a light source section configured to emit light, a light guide section configured to guide the light emitted from the light source section and including an emitting section configured to emit the guided light to the outside, and a light receiving section configured to receive the light emitted from the emitting section. At least one of the light source section and the light receiving section turns around a turning axis. Therefore, a transmission distance of the light from the light source section to the light receiving section changes.

Optical connection device, optical communication device, displacement detection device, and robot

A robot includes: a first arm that has a first light guide path, a second arm that has a second light guide path, a joint portion that has a rotation axis and connects the first arm and the second arm to each other so as to be rotatable about the rotation axis and a light rotary joint that is provided between the first light guide path and the second light guide path inside the joint portion and that optically connects the first light guide path and the second light guide path to each other. In addition, the light rotary joint has a first light guide portion which is fixed to the first light guide path and has a tubular shape about the rotation axis and an end portion of the second light guide path on the light rotary joint side faces the first light guide portion.

Robot

A projector capable of reliably reducing speckle noise includes a light modulation element which modulates laser light, and a projection optical system on which light emitted from the light modulation element is incident. When the center coordinates of an illumination distribution of laser light in an exit pupil of the projection optical system are x=0 and y=0, normalized illumination at each coordinate is P(x,y), and a calculation range of integration is r (mm), the value of EP determined from a specific numerical expression is set in a range according to the color of laser light.

Projector capable of reducing speckle noise

An image display apparatus includes a light output part that outputs modulated lights and a light scanning part that performs scanning with the modulated lights in first directions and second directions. Scanning with the respective modulated lights is performed only in ones of outward paths and return paths in the first directions, in an image plane, irradiated points of the modulated lights are arranged side by side in directions crossing the first directions, the scanning of the modulated lights is performed in the second directions for two scanning lines extending in the first directions at a time, and one of the irradiated points at a certain time is located in a position different from those of scanning tracks of the other.

Image display apparatus

A light modulator includes a substrate providing an electro-optical effect and provided with first to third optical waveguides, a first modulation section that modulates a blue light flux passing through the first optical waveguide, a second modulation section that modulates a green light flux passing through the second optical waveguide, and a third modulation section that modulates a red light flux passing through the third optical waveguide, and L1&#x3c;L2&#x3c;L3 and S1&#x3e;S2&#x3e;S3 are satisfied, where L1 represents the length of the first modulation section, S1 represents the distance between a first reference line and a first exit section, L2 represents the length of the second modulation section, S2 represents the distance between a second reference line and a second exit section, L3 represents the length of the third modulation section, and S3 represents the distance between a third reference line and a third exit section.

Light modulator, optical module, and image display apparatus

An illumination device includes a light source device, a uniformization optical system which uniformizes the illuminance distribution of light from the light source device on a region to be illuminated, and a diffraction optical element which is provided in an optical path between the light source device and the uniformization optical system, and rotates around a predetermined rotation axis. The diffraction optical element includes a first region which forms a first illuminance distribution, and a second region which is provided at a position different from the first region around the rotation axis, and forms a second illuminance distribution different from the first illuminance distribution.

Illumination device and projector

An illumination device includes a light source device which has a plurality of light emission regions including a first light emission region and a second light emission region, and is able to adjust the amount of light emitted from each of the plurality of light emission regions, a light source control device which controls the light source device such that, in a first period, the amount of light emitted from the first light emission region is different from the amount of light emitted from other light emission regions among the plurality of light emission regions, and in a second period, the amount of light emitted from the second light emission region is different from the amount of light emitted from the second light emission region in the first period, and an illumination optical system which superimposes light from the plurality of light emission regions in an illumination region.

An illumination device includes a light source including plural light emitting devices arranged in a pattern and that generate and guide light, the light emitting devices having tilted gain regions wherein guiding directions of the light are tilted with respect to a perpendicular of output surfaces of the light source, an optical axis conversion device that bends optical axes of the light output from the light source, and a light distribution control device that controls a light distribution angle of the light output from the optical axis conversion device, wherein the light emitting devices are super luminescent diodes, and the light output from the light distribution control device diverge.

Illumination device having improved illumination light symmetricalness and projector having the illumination device

An image processing device generates image data of a projection image displayed on a screen having a color obtained by correcting a color of original data representing an image to be displayed so that the projection image has a desired color. The image processing device includes a storage section adapted to store a spectral reflectivity of the screen, a designation section adapted to designate a type of an outside light in an installation environment of the screen, a correction light determination section adapted to determine a correction light using a spectral distribution of the reflected light obtained based on the spectral reflectivity and a spectral distribution of the outside light, and a color correction section adapted to generate the image data using the original data and data of a spectral distribution of the correction light.

Image processing device, projection display device, and image processing method

A screen includes: a base material; and a pigmented layer provided on one surface of the base material, the pigmented layer including a first pigment that absorbs a visible light component contained in room light, and a second pigment that absorbs ultraviolet light, wherein the second pigment absorbs the ultraviolet light contained in sunlight, and varies the color imparted by a remaining visible light component unabsorbed by the first pigment absorbing the visible light component of the sunlight, the color being varied in such a manner as to reduce the absolute value of a color difference on a chromaticity diagram between a white point and a point indicative of the color imparted by the remaining component.

Screen and projection system for reducing effects of ambient light

A screen includes: a substrate; and a first color material layer disposed on one surface of the substrate, wherein the first color material layer includes a first color material adapted to absorb light with a part of wavelengths of an incident light, and the first color material has a peak absorption wavelength in a visible light range, and a size of causing Mie scattering on the light in the visible light range.

Growing community of inventors

Shiojiri, Japan

Junichi Okamoto