Canon Kabushiki Kaisha

Hidefumi Notagashira

Toshimi Iizuka

Akiyasu Sumi

Akira Hiramatsu

Hiroyasu Murakami

Makoto Katsuma

Kazuhiko Miyahara

Hiroyoshi Inaba

Hiroshi Yamamoto

Akihiro Fujiwara

Tohru Kawai

Masaaki Ishihara

Toru Shinano

Shigeru Kamata

Masaharu Eguchi

Masato Hasegawa

Tsuyoshi Morofuji

Toru Ohara

Yoshiki Kino

Hidekage Sato

Yasuhiro Tamekuni

Katsumi Azusawa

Sinichi Tsujimoto

Tsuyoshi Akutsu

At least one exemplary embodiment is directed to an image pickup apparatus configured to switch between a color and a black & white photographing modes, which includes an image pickup optical system, an image pickup element that receives a light through the image pickup optical system and opto-electronically converts the received light, a first luminance detecting unit that detects a luminance of a photographed object based on a signal from the image pickup element, a second luminance detecting unit that detects the luminance of the photographed object by receiving a light without intervention of the image pickup optical system, and a filter converting mechanism for interposing any one of a infrared cutoff filter and an optical element in an optical path of the image pickup optical system.

Image pickup apparatus and image pickup system

A projector apparatus includes a color separation optical system which separates illumination light into color light components, image forming panels illuminated with the color light components, respectively, a color synthesis optical system which synthesizes the light components from the illuminated image forming panels, and a projecting optical system which projects light from the color synthesis optical system. Transparent substrates are arranged on at least one of incident and exit surface side of the image forming panels. Each of the transparent substrates holds a polarizer. A surface area of at least one of the transparent substrates is larger than those of the remaining transparent substrates.

Projector apparatus for preventing degradation in image quality due to heat

Disclosed is a projector apparatus including a color separation optical system which separates illumination light into a plurality of color light components, a plurality of image forming panels illuminated with the plurality of color light components, respectively, a color synthesis optical system which synthesizes the light components from the plurality of image forming panels illuminated, a projecting optical system which projects light from the color synthesis optical system, and transparent substrates each arranged on at least one of incident and exit surface sides of the plurality of image forming panels, each of the transparent substrates holding a polarizer, wherein a surface area of at least one of the plurality of transparent substrates is larger than those of the remaining transparent substrates.

Color projector apparatus having means for preventing degradation in image quality due to heat

A coordinate input apparatus detects the accurate position of the diffuse light emitted by the light emitting unit of a pointer. The diffuse light emitted from the pointer is collected by a condenser lens, the amount of the diffuse light is detected by a control-signal detecting sensor with a high sensitivity, its output is detected by a frequency detecting unit, and a control-signal detecting unit detects a control signal. The diffuse light emitted from the pointer also passes through a visible-light-cut filter to remove disturbance light, and is received by linear sensors for detecting the direction in which the light comes. The linear sensors are controlled by a sensor control unit. The output signals of the linear sensors are converted by an A-D conversion unit provided for the sensor control unit, sent to a coordinate calculation unit, and the output coordinates on the sensors are calculated.

Coordinate input apparatus, coordinate input system, coordinate input method, and pointer

The object of the present invention is to miniaturize an optical unit and an image display device. The optical unit of the present invention keeps an optical system so as to form an optical path inside a housing. The optical unit has at least one reflecting optical element, and the at least one reflecting optical element is formed in one body with the housing.

Optical unit, image display apparatus, and illumination adjustment method in an image display optical unit the same

Binoculars have a pair of objective units for forming an image separated with a fixed spacing, a pair of erecting prism units for transforming the image received from the pair of objective units to an erect image, and a pair of eyepiece units. Each of the pair of erecting prism units has a Pechan roof prism having a roof face, a disparity existing between luminous flux center incident on each of said pair of erecting prisms and an optical axis along which light exits from each of said pairs of erecting prisms. Each one of the pair of prisms rotates around an optical axis of a corresponding one of the pair of objective units. The eyepiece units receive the erect image from the erecting prism units, respectively, with each of the pair of eyepiece units being rotatable around an optical axis of a corresponding one of the pair of objective units.

Binoculars having objectives spaced apart at a fixed distance and adjustable eyepieces

Binoculars includes a pair of objective optical units, a pair of eyepiece lens units for observing an image formed by the pair of the objective optical units, a pair of corrective optical units, respectively arranged in optical paths of the pair of the objective optical units, for correcting image blurring by changing the optical paths, a lock member that is shifted between a locked position in which an operation for changing the optical path of each of the corrective optical units is locked and an unlocked position in which the operation for changing the optical path is unlocked, a driver for driving the lock member to one of the locked position and the unlocked position, and a control member for activating the drive operation by the driver.

Binoculars

An optical apparatus or a control device to be used for a light flux deflecting apparatus is arranged to include at least two light flux deflecting portions and a control portion which control the driving actions of the at least two light flux deflecting portions in such a manner that, with the light flux deflecting portions applied as image shake preventing mechanisms to an optical apparatus using a plurality of light fluxes, such as a binocular, the arrangement effectively prevents such inconveniences as the necessity of using a plurality of control portions in controlling each of the light flux deflecting portions and giving a disagreeable feeling to the user due to a discrepancy arising in the amount of deflection between two light fluxes.

Optical apparatus having image shake preventing function

A lens barrel comprises a lens, a lens holding member holding the lens and movably supported, and cam arrangement for moving the lens holding member. The cam arrangement has a cam portion projectedly formed on a movable cam member, and a cam follower contacting with the cam portion. The cam follower has a plurality of contact surfaces for sandwiching the cam portion therebetween by surface contact. The plurality of contact surfaces are disposed while being deviated along the direction of extension of the cam portion.

Lens barrel

Optical apparatus comprises an optical element and a moving mechanism having two members arranged to move the optical element in the direction of an optical axis thereof by moving one of the two members in the direction of the optical axis relative to the other while rotating said two members relative to each other. The two members include a male helicoid member having a male helicoid screw and a female helicoid member having a female helicoid screw arrangement in screw engagement with the male helicoid screw, the female helicoid screw arrangement providing only a single screw thread peripherally interiorly of the female helicoid member along an axis parallel to the optical axis.

Optical apparatus

A magnifying power varying device comprises an operation member which is arranged to permit selection between a power varying operation in a telephoto direction and a power varying operation in a wide-angle direction, a transmission mechanism for driving the power varying mechanism, a driving mechanism which generates a driving force, and a change-over mechanism which is arranged to connect the driving mechanism to the transmission mechanism when the power varying operation is performed in the telephoto direction or in the wide-angle direction by means of the operation member and to forcibly disconnect the driving mechanism from the transmission mechanism when the operation of the operation member is canceled.

Growing community of inventors

Kanagawa, Japan

Hidefumi Notagashira