Qd Laser, Inc.

Nissan Motor Company Limited

Kenji Yasui

Makoto Suzuki

Mitsuru Sugawara

Tsuyoshi Sugimoto

Kei Tanaka

Kinya Hasegawa

Kazutaka Saito

Hironori Miyauchi

Ryosuke Hiraishi

Yukichi Okayama

Takeshi Oshio

An image relay device that projects laser light representing an image emitted from a projection device onto the retina is provided. The image relay device includes a projection device, a first optical member, and a second optical member. The projection device includes a light source configured to emit laser light and a scan unit configured to scan the laser light based on image data. The first optical member receives an image light from the projection device and converts the image light which is a parallel light, to light beams of convergent light. The second optical member converts the light beams output from the first optical member into parallel light.

Image relay device and image projection system

A visual sense examination device includes: a beam source that emits a visible beam and an invisible beam; a visible beam optical system that includes a first scanner scanning the visible beam; an invisible beam optical system that includes a second scanner scanning the invisible beam; a detector that detects the invisible beam reflected by a retina of a subject; a controller that performs a first control; a synthesizer that synthesizes the visible beam scanned by the first scanner and the invisible beam scanned by the second scanner; and wherein scanning angles of the visible beam by the first scanner and the invisible beam by the second scanner are substantially the same, and projectable ranges of the visible beam scanned by the first scanner and the invisible light scanned by the second scanner are substantially the same on the retina of the subject.

Visual sense examination device

An image projection device includes: a light source emitting a light beam; an image input unit inputting image data; a control unit generating an image light beam based on the input image data, and controlling emission of the image light beam from the light source; a scan unit scanning the image light beam emitted from the light source; and a projection optical member illuminating a retina of an eyeball of a user with the image light beam scanned by the scan unit, and projecting an image onto the retina, wherein a diameter of the image light beam at a time when the image light beam enters a cornea of the eyeball is not smaller than 310 &#x3bc;m and not larger than 800 &#x3bc;m, and a user having an original visual acuity in a range of 0.04 to 1.2 has an acquired visual acuity of 0.4 or higher.

Image projection device

A retinal scanning type eye examination device includes a storage unit configured to store test image data; a laser emitting unit including a laser light source configured to generate an imaging laser beam based on the test image data, the laser emitting unit being configured to project a test image onto a retina of an eyeball of a person subjected to an eye examination by using the imaging laser beam; an optical component configured to cause the imaging laser beam to converge at an inside of the eyeball of the person; a parameter acquiring unit configured to acquire parameter information for a retinal scanning type eyewear, the parameter information including angle information indicating a rotation angle of the laser emitting unit when the laser emitting unit is rotated around a converging point of the laser beam; and an output unit configured to output the parameter information to an external device.

Retinal scanning type eye examination device, retinal scanning type eye examination system, eyewear provision system, and retinal scanning type eyewear

A heat treatment method is provided in which a first steel component () formed with a coating () thereon is fitted in first holes () of a second steel component () subjected to a quenching treatment. The heat treatment method includes a heating step of heating the second steel component to a first temperature (T) equal to or higher than a tempering temperature (T) of the second steel component and higher than a temperature of the first steel component by a temperature difference (&#x394;T) for achieving shrink fitting and a shrink-fitting step of shrink-fitting the first steel component in the first holes of the second steel component in a state of maintaining the temperature difference for achieving shrink fitting between the first steel component and the second steel component.

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Kanagawa, Japan

Kenji Yasui