Tokyo University of Agriculture and Technology

Itoh Optical Industrial Co., Ltd.

Yasuhiro Takaki

Yasushi Miyajima

Nobuyuki Hashimoto

Ei-ichiro Nishihara

Provided is a head-mounted display capable of expanding the range in which a user can clearly view images. A head-mounted displayincludes a display deviceto display imagesandfor the left eye and the right eye on a screen, and virtual image forming optical systemsandfor the left eye and the right eye respectively disposed with respect to the imagesandfor the left eye and the right eye on the screen, wherein the virtual image forming optical systemsandhave positive power set in respective regions that visual lines of a user pass through, and include, at outer sides of optical centers in directions orthogonal to optical axes, power adjusting regionshaving power set closer to the negative side than power at the optical centers.

Head-mounted display and virtual image forming lens to be used for the head-mounted display

Provided is a head-mounted display that enables viewing of a stereoscopic image without visual fatigue caused by vergence-accommodation conflict. A head-mounted display includes a display device to display images for the left eye and the right eye on a screen, virtual image forming optical systems for the left eye and the right eye, respectively disposed with respect to images for the left eye and the right eye on the screen, and wide-focus lenses for the left eye and the right eye having a negative focal length with a range, and respectively disposed with respect to the virtual image forming optical systems for the left eye and the right eye so as to overlap optical axis directions of the virtual image forming optical systems for the left eye and the right eye. By respectively displaying virtual images of images, a permissible range of vergence and accommodation is expanded.

Head-mounted display and method for designing wide-focus lens to be used for the head-mounted display

Provided are stereoscopic eyeglasses capable of reducing visual fatigue in binocular stereoscopic display by a simple configuration. In stereoscopic eyeglasses, in order to expand a tolerance of match between vergence and accommodation enabling comfortable stereovision in eyeglasses-using stereoscopic display, wide-focus lenses ranging in focal length are incorporated so as to overlap optical filters in light transmission directions, and accordingly, visual fatigue to be caused by vergence-accommodation conflict during stereoscopic image observation is reduced.

Stereoscopic eyeglasses, method for designing eyeglass lens to be used for the stereoscopic eyeglasses, and method for observing stereoscopic image

An object of the present invention is to provide a wavefront aberration correcting device comprising a liquid crystal device that maximizes transmittance and minimizes light transmittance fluctuations even when the liquid crystal is driven by voltage. Disclosed is a wavefront aberration correcting device for correcting a wavefront aberration of light generated in an optical path of an optical system for irradiating light onto a recording medium or guiding the reflected light reflected by the abovementioned recording medium is characterized in that it comprises a pair of opposing transparent electrode layers provided in the abovementioned optical path; and a liquid crystal sandwiched between the abovementioned transparent electrode layers, for generating phase change in passing light due to voltage applied to the abovementioned transparent electrode layers, the abovementioned transparent electrode layer is arranged on an antireflective body comprising a substrate, and a finestructure formed on a substrate and having a concave-convex structure.

Growing community of inventors

Fuchu, Japan

Yasuhiro Takaki