Ricoh Company, Ltd.

Yokohama Tlo Company, Ltd.

Naoki Miyatake

Yoshinori Hayashi

Hiromichi Atsuumi

Seizo Suzuki

Tadashi Nakamura

Yuki Hayashi

Naoki Nakamura

Daisuke Ichii

Makoto Hirakawa

Yukio Itami

Yukihisa Yokoyama

Naoto Watanabe

Taku Amada

Tomohiro Nakajima

Mitsuo Suzuki

Shigeaki Imai

Kazuyuki Shimada

Takeshi Ueda

Satoru Itoh

Naoto Shiraishi

Hisao Shirasawa

Kazunari Tonami

Tomoya Ohsugi

Yuichiro Kanoshima

Kento Nakamura

Takao Yamaguchi

Kazuhiro Fujita

Kohji Sakai

Hibiki Tatsuno

Sadayuki Iwai

Satoshi Tsuchiya

Kensuke Masuda

Kiichiro Nishina

Magane Aoki

Hideaki Sato

Takehide Ohno

Nobuyuki Arai

Eiichi Hayashi

Noriyuki Iwata

Go Takahashi

Chieko Hatashita

Fumiaki Tajima

Nobuo Matsuda

A display apparatus includes a screen configured to form an intermediate image by being irradiated with light, a front windshield configured to display a virtual image by being irradiated with light forming the intermediated image, a reflection member configured to reflect light going out from the screen to the front windshield, and a rotation shaft configured to rotate the reflection member. The rotation shaft is tilted with respect to a pitch axis. The reflection member has notches formed thereon.

Display apparatus and equipment

An optical scanning device includes: a light source unit configured to emit a light beam; a light deflecting unit configured to two-dimensionally deflect the light beam in a main scanning direction and a sub-scanning direction orthogonal to the main scanning direction; and an image formation unit configured to form an image by two-dimensional scanning of the light beam performed by the light deflecting unit, in which a flat plate configured to transmit light incident on the light deflecting unit and deflected reflection light from the light deflecting unit is arranged in an optical path of the light beam between the light deflecting unit and the image formation unit, and the flat plate is inclined with respect to the image formation unit in a cross section in the sub-scanning direction.

Optical scanning device, image display device, and vehicle

A display device includes a screen to form an intermediate image with light; a concave mirror, and a first mirror disposed between the screen and the concave mirror. The first mirror includes a first reflective area to reflect the light emitted from the screen to the concave mirror; a second reflective area to reflect the light emitted from the concave mirror to an area where a virtual image is formed; and a common reflective area in which the first reflective area and the second reflective area at least partly overlap on each other.

Display device and including a screen concave mirror and flat mirror

An image display apparatus includes a light source device including a light source unit; a scanning optical system including an image forming unit on which an intermediate image is formed by light from the light source unit; and a virtual image optical system configured to guide light of the intermediate image by using a reflecting mirror and a curved transmissive reflection member. The scanning optical system includes an optical scanning unit configured to scan the light from the light source unit in a main scanning direction and a sub-scanning direction of the image forming unit. The image forming unit is a transmissive member curved with a convex surface toward the reflecting mirror.

Image display apparatus

An optical scanning apparatus includes a light source to emit light, a light deflector having a reflection face to deflect the light as a scan-use light to scan an image generation element by oscillating the reflection face, a light receiving element to receive a control-use light to generate a signal used for controlling a scanning condition of the scan-use light, and a control unit to control the scanning condition of the light deflector based on the generated signal.

Optical scanning apparatus and image display apparatus

An image display device includes an image forming unit configured to emit light forming an image; and a concave mirror configured to reflect the light emitted from the image forming unit toward a transparent reflecting member. The image forming unit includes a transparent member on which the image is formed or which forms the image, the transparent member being curved bulging toward the concave mirror.

Image display device and apparatus

An optical scanning device includes plural light sources, a light deflector including a deflecting-reflecting surface, and a scanning optical system including plural folding mirrors and plural scanning lenses, wherein the plural scanning lenses have the same shape, at least one of an optical surface at the incidence side and an optical surface at the emission side has an asymmetric shape with respect to a sub-scanning direction, and has an asymmetric shape in the sub-scanning direction with respect to the main scanning direction, and a difference in a number of folding mirrors disposed between the corresponding scanning lens and the light deflector between light incident on the light deflector from a direction inclined to one side relative to a virtual surface including a normal line of the deflecting-reflecting surface and light incident on the light deflector from a direction inclined to the other side is an odd number.

Optical scanning device and image forming apparatus

An optical scanning unit includes a rotatable multi-faceted mirror having a plurality of faces reflecting light flux emitted from a light source to scan a scanning area in a main scanning direction. A width of the light flux striking the rotatable multi-faceted mirror is smaller than a length of a face of the rotatable multi-faceted mirror. The entire of light flux striking the rotatable multi-faceted mirror is reflected at a first face when the light flux reflected by the rotatable multi-faceted mirror is directed to the center portion of the scanning area. A part of the light flux striking the rotatable multi-faceted mirror is reflected at the first face while the remaining of the light flux is reflected at a second face when the light flux reflected by the rotatable multi-faceted mirror is directed to a least one of the two end portions of the scanning area.

Optical scanning unit and image forming apparatus

An optical scanning device including a light source and a rotating polygon mirror having a plurality of reflective surfaces scans a scan area of a surface in a main scanning direction with the light flux emitted from the light source and reflected by the rotating polygon mirror. All the light flux is reflected by a first reflective surface when light flux deflected by the rotating polygon mirror is directed onto a center position of the scan area, and a part of the light flux incident to the rotating polygon mirror is reflected by a second reflective surface adjacent to the first reflective surface when light flux reflected by the rotating polygon mirror is directed onto at least one end of both ends of the scan area and the light flux obliquely enters a plane perpendicular to a rotation axis of the rotating polygon mirror.

Optical scanning device including a rotating polygon mirror and image forming apparatus incorporating same

An optical scanning device includes a plurality of light sources configured to emit a plurality of light beams, respectively; an optical deflector having a deflection-reflection surface that deflects and reflects the light beams, each of the light beams being incident on the deflection-reflection surface at an oblique incident angle, the oblique incident angles of the light beams being different from one another; and a flat glass arranged to be tilted at a tilt angle with respect to the deflection-reflection surface in a sub-scanning direction, the light beams being incident on the deflection-reflection surface via the flat glass, the tilt angle being smaller than a largest one of the oblique incident angles of the light beams. The light beams deflected and reflected by the deflection-reflection surface are incident on a plurality of scanned surfaces via the flat glass, respectively.

Optical scanning device, image forming apparatus and optical scanning method

Each scanning optical system includes a first scanning lens and a second scanning lens through which a light beam is incident onto the first scanning lens. The second scanning lens of each scanning optical system is disposed at the optically most downstream side in the scanning optical system and has an optical plane that has the strongest power in a sub-scanning corresponding direction. In addition, the optical plane of each second scanning lens, which has the strongest power in the sub-scanning corresponding direction, is located under the shaft bearings of neighboring polygon mirrors in the vertical direction.

Growing community of inventors

Kanagawa, Japan

Naoki Miyatake