Ricoh Company, Ltd.

Suguru Sangu

Shu Tanaka

Shuichi Suzuki

Saori Yoshida

Tatsuya Shimokawa

Atsushi Sakai

Masato Yoshikawa

Hiroshi Miura

Hiroaki Fukuda

Yoshitaka Hayashi

Junichi Takahashi

Ryo Saito

Kazuhiko Adachi

Noriyuki Iwata

Izumi Itoh

Masato Takada

Kayoko Fujimura

Toshiki Yamanaka

Nobuaki Toyoshima

Taroh Terashi

Yuki Abe

An optical device, a method of detecting the degree of inclination of a three-dimensional object, and a method of detecting a line of sight. The optical device includes a plurality of light emitters configured to irradiate an object with light, a detector configured to detect the light reflected by the object and output a signal based on the light reflected by the object, and circuitry configured to output data of a degree of inclination of the object obtained based on an output signal output from the detector. In the optical device, the light emitted from the light emitter is temporally modulated by a code having orthogonality, and the plurality of light emitters include a first light emitter and a second light emitter. In the optical device, the first light emitter emits the light at a timing different from a timing at which the second light emitter emits the light.

Optical device, line-of-sight detection device, retinal projection display device, head-mounted display, optometric device, user-condition estimation apparatus, driver-assistance system, method of detecting degree of inclination of three-dimensional object, and line-of-sight detection method

A displacement measurement device includes: an irradiation unit that irradiates a measurement object with coherent light; a luminance-change coordinate point detection unit that detects a luminance-change coordinate point where a luminance change has occurred, based on light reflected from the measurement object, and outputs data related to the luminance-change coordinate point; and circuitry that calculates an amount of displacement of the measurement object, based on the data related to the luminance-change coordinate point, by performing computations of a first numerical sequence and a second numerical sequence. The first numerical sequence includes a set of first elements each representing a location of the luminance-change coordinate point extracted from the data. The second numerical-sequence includes a set of second elements each representing a location of the luminance-change coordinate point extracted from the data.

Displacement measurement device, non-contact input apparatus, and biological micromotion measurement apparatus

A retinal projection display device for projection of an image onto a retina of a wearer wearing an eyeglass-type support is provided. The retinal projection display device includes the eyeglass-type support including a temple; a light source; an optical scanner disposed in the temple and configured to scan light from the light source so as to form the image; a projector configured to project the image formed by the optical scanner onto the retina; an optical deflector disposed in the temple and configured to change a projection direction of the image formed by the optical scanner; and a translation member configured to translate the optical scanner and the optical deflector in a direction in which the temple extends.

Retinal projection display device, head-mounted display device, and optometric device

An optical device, a method of detecting inclination of a three-dimensional object, and a method of detecting a line-of-sight. The optical device includes a light source configured to irradiate an object with light, a detector configured to detect a position of the light reflected by the object, and circuitry configured to output data of a degree of inclination of the object obtained based on the position of the light and a prescribed parameter, and change the prescribed parameter based on the position of the light. The above methods include irradiating an object with light, detecting a position of the light reflected by the object, outputting data of a degree of inclination of the object obtained based on the position of the light and a prescribed parameter, and changing the prescribed parameter based on the position of the light.

Optical device, method of detecting degree of inclination of three-dimensional object, and line-of-sight detection method

An optical device includes a light source section configured to emit light; a converging reflector configured to converge and reflect the light from the light source section to an irradiation surface having a curvature; and a position detector configured to detect a light-receptive position of the light reflected from the irradiation surface.

Optical device, retinal projection display, head-mounted display, and optometric apparatus

An optical device includes a light source that emits light to irradiate an object, a light emission driver that drives the light source to emit light at a predetermined light emission period, a position detector that outputs a detection signal corresponding to reflected light that is the light reflected by the object, and a signal extractor that extracts, from the detection signal, a signal with a period corresponding to the light emission period by using a reference signal with a period corresponding to the light emission period, and outputs the extracted signal.

Optical device, retinal projection display, head-mounted display, and input device

An eyeball-tilt detecting device for detecting a tilt position of an eyeball, including: a light source array including a plurality of light emitting sections that emit light having directivity; an optical spot position detection element configured to detect an optical spot position of light reflected from an eyeball to output a detection signal; and processing circuitry configured to calculate a tilt position of the eyeball based on the detection signal output from the optical spot position detection element.

Eyeball-tilt position device and apparatus including same

An optical modulator element includes a plurality of hole structure, a first liquid reservoir that stores a liquid to be propelled into the plurality of hole structure, a plurality of second liquid reservoirs that store the liquid to be propelled into the plurality of hole structure, and a movement control part that is arranged at at least one end of the second liquid reservoir that is closest to the first liquid reservoir and controls a movement of the liquid from the first liquid reservoir.

Optical modulator element, imaging apparatus, image projecting apparatus

An imaging module has a spatial light modulation element which applies spatial modulation to an incident luminous flux and emits it; an image sensor which obtains the luminous flux to which the spatial modulation has been applied by the spatial light modulation element as image information; and a fixing part which integrally fixes the spatial light modulation element and the image sensor, and the fixing part has a gap-defining member which is arranged between the spatial light modulation element and the image sensor and forms a gap structure having a certain distance, and an imaging device includes the imaging module.

Imaging module and imaging device

An optical element for condensing light is provided, wherein the optical element has a first cylindrical face and a second cylindrical face at one side and a third cylindrical face at an other side and a plane including an axis of the first cylindrical face and an axis of the third cylindrical face intersects with a plane including an axis of the second cylindrical face and the axis of the third cylindrical face. A light detection device for detecting light is provided, wherein the light detection device includes the optical element as described above and an element for detecting light condensed by the optical element.

Optical element and a light detection device and an object sensing system

It is an object of the present invention to provide an optical recording medium containing a laminated structure of a first deformable material layer containing a phase-change material that absorbs light at a recording wavelength to generate heat and is subject to exothermic melting and deformation and a second deformable material layer containing a material which contains a silicon oxide (SiOx; 0&#x3c;x&#x2266;2) that transmits light and is subject to thermal deformation and alteration. After information is recorded, the thickness of the first deformable material layer is changed according to the recorded information making center of the recorded marks thicker than the ends and the second deformable material layer is deformed and altered corresponding to the concave-convex-pattern formed on the first deformable material layer based on the recorded information and when the information is reproduced, the first deformable material layer is altered from solid to molten state.

Optical recording medium and recording and reproducing method using the same

A polarization control device includes a support substrate on which a metal compound structure is formed. The metal compound structure is formed with at least two metal fine structures arranged periodically in a range equal to or smaller than a wavelength of an incident light.

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Kanagawa, Japan

Suguru Sangu