Konica Corporation

Konica-Minolta Holdings, Inc.

Konica Minolta Opto, Inc.

Mazda Motor Corporation

Konica Minolta, Inc.

Toshiyuki Kojima

Norikazu Arai

Kohei Ota

Shinichiro Saito

Toshihiko Kiriki

Junji Hashimura

Tohru Kimura

Teruhiko Itoh

Akira Sawagami

Hiroyuki Yamazaki

Akihiro Nakamura

Yuichi Atarashi

Keiji Maruyama

Norihide Yamada

Eiji Nomura

Takayuki Yamaguchi

Koji Honda

Kazuhiro Sugawara

Yuji Matsuo

Kentaro Takaki

Hiroyuki Jinno

Osamu Tannai

A head-up display apparatusincludes: a projection optical systemthat projects a virtual image; an environment monitor portionas an object detection part that detects an object present in a detection region and detects a distance from the projection optical systemto the object as a target distance; an arrangement change apparatusas a projection distance change part that periodically changes a projection distance of a virtual image from the projection optical system; and a main control apparatusand a display control portionas an image addition part that adds a related-information image as a virtual image by the projection optical systemto the detected object at timing when the target distance substantially matches the projection distance.

Head-up display apparatus

An engine includes a variable valve mechanism capable of switching a valve characteristic to a first valve characteristic according to which at least one of an operation of pre-opening an intake valve during an exhaust stroke prior to a valve opening time in an intake stroke and an operation of re-opening an exhaust valve during the intake stroke subsequently to the opening/closing thereof during the exhaust stroke is performed, and to a second valve characteristic according to which neither the pre-opening of the intake valve nor the re-opening of the exhaust valve is performed. In the engine, when the valve characteristic is the first valve characteristic, if the presence of a request for switching to the second valve characteristic resulting from an increase in engine load is detected, a pressure reducing operation for reducing the pressure in an exhaust passage of the engine is performed.

Engine with variable valve mechanism

An objective lens system for an optical pickup apparatus, includes in order from an object side: a first lens group having negative paraxial power P(mm); and a second lens group having positive paraxial power P(mm) for converging a light flux emitted from the first lens group on an information recording surface of an optical information recording medium.

Condenser lens for an objective lens system

An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelength; a second light source for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system having an optical axis and a diffractive portion, and a photo detector; wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.

Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method

Objective optical system for optical pickup apparatus, optical pickup apparatus, driving apparatus for optical information recording medium, condenser lens and optical path compounding element

Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element and information recording/reproducing method

A molded lens used in an optical pickup device provided with a plane of incidence having a first optical surface and a plane of emergence having a second optical surface, and a form of an outer circumference of the molded lens is formed by a first straight line portion which is in parallel substantially with a plane including an optical axis, a second straight line portion which is in parallel with the first straight line portion and is symmetric with the first straight line portion about the plane and by two circular arcs each connecting end portions of the first and second straight line portions. A part of a fringe of each of the first and second optical surfaces is substantially in a form of a circle whose center is on the optical axis is cut off by each of the first and second straight line portions.

Molded lens having an outer circumference and first and second optical surfaces with cut off peripheral portions, and molding die for the molded lens

Growing community of inventors

Hachioji, Japan

Toshiyuki Kojima