Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Yoshiharu Yamamoto

Motonobu Yoshikawa

Yasuo Nakajima

Kazutake Boku

Michihiro Yamagata

Daizaburo Matsuki

Yasuhiro Tanaka

Yoshitomi Nagaoka

Hiroshi Yamaguchi

Yoshito Miyatake

Masanori Yoshikawa

Shusuke Ono

Hironori Nakashima

Keiki Yoshitsugu

Hiroaki Okayama

Kenichi Ikeda

Hajime Yamamoto

Akinobu Okuda

Syunsuke Kimura

Masayuki Takahashi

Yuichi Kimura

Syusuke Ono

Akinori Yusa

Katsuhiko Hayashi

Yoshihiro Tomita

Ryoichi Takayama

Katsu Yamada

Masaru Fujita

Yoshiki Hayashida

Hideo Hirose

Toshihiro Yoshioka

Tsugio Murao

Toshihiko Shibita

Akio Nakasuji

Ken Morishima

Daizaburou Matsuki

An antireflection structure that can be formed in a desired shape, and a method for manufacturing the same are provided. An antireflection structureincludes a resin layerformed in a desired shape, and inorganic material fine particlesdispersed inside the resin layer. A plurality of fine concaveshaving an average inner diameter shorter than or equal to the minimum wavelength of light whose reflection should be suppressed are formed at the surface of the antireflection structure, thereby reducing the equivalent refractive index at the surface of the resin layer. The fine concavesare formed by, after forming a composite material in which the nanosized inorganic material fine particlesare dispersed in the resin layer, dissolving the inorganic material fine particlesdispersed at the surface of the resin layer, using a solvent that dissolves only the inorganic material fine particles

Antireflection structure, lens barrel including antireflection structure, method for manufacturing antireflection structure

A light-absorbing member has a substrate () made of a material capable of absorbing light of which reflection is to be prevented, and an antireflection structure () having structural elements arranged on the surface of the curve in an array form at a period smaller than the wavelength of the light. The substrate having the shape of a curve viewed from a macroscopic viewpoint. The structural elements have a shape protruding or being recessed from a reference face corresponding to the curve of the substrate, and are arranged so that the straight lines connecting the reference face to the tips of the respective structural elements are nearly parallel to one another.

Light-absorbing member

A reflection of unnecessary light, which should be prevented, can be suppressed, and occurrence of stray light can be reduced using a member having an antireflection structure, comprising a plate-like portion, and an aperture portionformed in the plate-like portion, wherein the antireflection structure having an aspect ratio ofor more and comprising structural elements arranged in an array form at a period smaller than the shortest wavelength of light, the reflection of which should be prevented, is formed on an inner wallof the aperture portion

Member having antireflection structure

An illumination optical system includes a light source for emitting a plurality of different colors of light, a plurality of rotating optical scanners, and a plurality of scanning lenses. Each of the optical scanners has a reflecting surface that is formed helically around a cylindrical body. The different colors of light enter the respective reflecting surfaces in the direction parallel to the rotation axis, are reflected therefrom, and pass through the scanning lenses, so that each color of light is magnified and then scans the region to be illuminated sequentially. This makes it possible to provide an illumination optical system that can improve scanning linearity, lower noise because of its reduced wind resistance, and achieve reduction in the cost and power consumption.

Illumination optical system, projection video system using the same, and integral-type video display

A light quantity distribution control element includes a substrate of 20 mm&#xd7;20 mm&#xd7;3 mm made of a material that transmits light, such as optical glass or acryl, and a antireflective structure provided on a surface of the substrate. As the antireflective structure, a conical antireflective structure of a pitch of 0.15 &#x3bc;m (periodic structure having conical convexities) is formed. This corresponds to a antireflective structure having a pitch of a wavelength or less in the ultraviolet band (150 nm to 400 nm) at the time when ultraviolet light is used as incident light.

Light quantity distribution control element and optical apparatus using the same

In a lens barrel for holding an imaging optical system that forms an optical image of an object, the imaging optical system comprises an object side lens unitonto which light ray from the object is incident and a reflective optical elementhaving a reflecting surfacefor bending the light ray exiting from the object side lens unit, and in an imaging state, the object side lens unitis held in a manner movable in a direction of the light ray from the object, and while in an accommodated state, the reflective optical elementis escaped to an escape position different from a position located in the imaging state.

Lens barrel, imaging device and camera

A wide-angle imaging optical system includes a refractive optical system (), a reflective optical system, and an image-forming optical system (). The reflective optical system includes a first reflection surface () that directly reflects rays of light from an object, and a second reflection surface () that reflects rays of light from the first reflection surface (). An open portion is provided between the first reflection surface () and the second reflection surface (), and rays of light from the object enter the open portion. A light-transmitting portion () is provided in the second reflection surface () and transmits rays of light that have entered the refractive optical system (). An aperture () is provided in the first reflection surface () and allows rays of light from the second reflection surface () and the refractive optical system () to enter the image-forming optical system ().

Wide-angle imaging optical system and wide-angle imaging apparatus surveillance imaging apparatus vehicle-mounted imaging apparatus and projection apparatus using the wide-angle imaging optical system

The present invention includes three or more lens groups. These are arranged in the order of a first lens group () that has positive refractive power and a second lens group () that has negative refractive power, as seen from the side having the longer conjugate distance, wherein a first lens () of the lenses of the second lens group (), as seen from the side having the longer conjugate distance, has positive refractive power. Thus, it is possible to suppress distortion aberration to a small value.

Zoom lens, video enlarging/projecting system, video projector, rear projector, and multivision system

A low-cost contact detection sensor and contact detection method for easily detecting a contact by a third party is provided. A contact detection sensor comprises an antireflection structure including structure elements having a predetermined shape which are put in an array periodically at a pitch smaller than a wavelength of visible spectrum; and a substrate including the antireflection structure in at least a part of a surface portion thereof. The antireflection structure distinguishes whether the detection target is contacted by a human body or not based on a change in reflectance which occurs to an area of the detection target contacted by the human body when the detection target is contacted by the human body.

Contact detection sensor and contact detection method

A distance-measuring optical apparatus for measuring a distance to an object as a target comprises an imaging optical system; an image sensor; a driving section for moving at least the imaging optical system substantially perpendicular to an optical axis; an image sensor control section for outputting a periodical timing signal for designating a timing at which the image sensor takes an object image; and a driving control section for controlling the driving section to reciprocate the imaging optical system. The timing signal is periodically output when the imaging optical system is located near two positions away from each other in a direction substantially perpendicular to the optical axis. The distance-measuring optical apparatus further comprises an image processing operation section for finding, through an operation, a distance from the imaging optical system to the object using the image signal when the imaging optical system is at each of the two positions.

Distance-measuring optical apparatus, distance-measuring method, distance-measuring system, in-vehicle imager, and in-vehicle driving support apparatus

The over-field type optical scanner includes a first imaging optical system disposed between a light source and a rotating polygon mirror for forming, on one surface of the rotating polygon mirror, a linear image with a width larger than a width along a main scanning direction of the one surface of the rotating polygon mirror; and a second imaging optical system composed of a curved mirror for focusing, on a scan surface, a light beam having been reflected by the rotating polygon mirror. The first imaging optical system includes a first conversion optical system for converting the light beam emitted from the light source into a divergent light beam with respect to the main scanning direction and into a convergent light beam with respect to the sub scanning direction; and a second conversion optical system having a refracting power in the main scanning direction.

Optical scanner and image forming apparatus

A single lens element used for converting a divergent pencil of rays, radiated from a light source, into a predetermined convergent state, wherein

Single lens element, light source device and scanning optical device

An optical scan apparatus includes an optical deflection unit (), an image formation optical system (), and curved surface mirrors (to). Light fluxes from the image formation optical system () come onto the deflection surface () of die optical deflection unit () in an oblique direction. Light fluxes from the optical deflection unit () come onto the curved surface mirrors (to) in an oblique direction. When a boundary is a plane () including a normal at the center of the deflection surface () and parallel to the main scan direction, the curved surface mirrors (to) are arranged in the same space divided by the boundary and the scan speeds of fluxes scanning the surfaces to be scanned (to) are almost identical. Thus, it is possible to obtain identical drive frequencies of the light sources (to), thereby simplifying the circuit.

Growing community of inventors

Toyonaka, Japan

Yoshiharu Yamamoto