Sony Corporation

Renesas Electronics Corporation

Mitsubishi Gas Chemical Company, Inc.

Mitsubishi Engineering-plastics Corporation

Masaki Tamura

Yasuhide Nihei

Daigo Katsuragi

Hiroshi Horikoshi

Hiroyuki Okada

Motoharu Takeuchi

Yuichi Yoshimura

Masanori Shimuta

Takahiro Matsui

Sota Miyatani

Yasushi Takahashi

Yoshito Iwasawa

Yuichi Machida

Ryoichi Kajiwara

Nobuya Koike

Akira Muto

Takeshi Hatakeyama

Keiichi Okawa

Fujio Kanai

Takuya Nakajo

Atsushi Fujiki

Kenichi Narita

Satoshi Kanayama

Atsushi Oohata

Kenshi Nabeta

Kazuki Sakae

Naohisa Akashi

Miki Sato

Shinya Kunimatsu

Sigehisa Motowaki

Hiroshi Hozouji

An imaging device of the disclosure includes an imaging lens; an imaging element that converts an optical image formed on an image forming surface by the imaging lens, into an electric signal; and a computing device that corrects distortion aberration of an image picked up by the imaging element. The imaging lens includes, in order from object side, a front-group lens system having positive refractive power, and a rear-group lens system having negative refractive power, a lens surface on a closest side to the image of the rear-group lens system being concave on an image side near an optical axis and convex on the image side around a periphery, and the following conditional expression is satisfied:5(%)&#x3c;&#x3c;20(%)&#x2003;&#x2003;(1)

Imaging device and imaging lens

An imaging unit of the disclosure includes an imaging lens including a first lens group and a second lens group that are disposed in order from object side toward image side, and an imaging device that converts an optical image formed by the imaging lens into an electric signal. The second lens group and the imaging device are rotationally moved integrally to allow the second lens group and the imaging device to be tilted with respect to an optical axis of the first lens group.

Imaging unit and imaging apparatus with rotatable lens group for optical vibration isolation

Provided is a thermoplastic resin composition a resin molded article of which has excellent mechanical strength. The thermoplastic resin composition comprising: a thermoplastic resin; relative to 100 parts by weight of the thermoplastic resin, 0.01 to 30 parts by weight of an additive having a Mohs hardness of 5.5 or larger; and 10 to 200 parts by weight of glass fiber, wherein the glass fiber comprises SiOand AlOin a proportion of 60 to 70% by weight of SiOand 20 to 30% by weight of AlO.

Thermoplastic resin composition and resin molded article

An image quality is improved although a medical stereomicroscope optical system and a medical observation apparatus are small and light. An objective optical system and a plurality of imaging optical systems are arranged in an order from an object side to an image side, and the imaging optical system has at least a single aspheric surface. Accordingly, a spherical aberration and a field curvature are improved, and the image quality is improved although the medical stereomicroscope optical system and a medical observation apparatus are small and light.

Medical stereomicroscope optical system and medical observation apparatus

An imaging lens according to the disclosure includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens includes a meniscus lens that has a convex surface facing object side and has positive refractive power near an optical axis. The second lens has a convex surface facing the object side and has negative refractive power near the optical axis. The third lens has positive refractive power near the optical axis. The fifth lens has positive refractive power near the optical axis. The sixth lens has negative refractive power near the optical axis and has an aspheric surface on the image plane side. The aspheric surface has an inflection point. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are disposed in order from the object side toward the image plane side. The imaging lens satisfies the following conditional expressions.5&#x3c;1&#x2003;&#x2003;(1)&#x2212;0.9&#x3c;(51+52)/(51&#x2212;52)&#x3c;4&#x2003;&#x2003;(2)2/6&#x3e;1&#x2003;&#x2003;(3)

Imaging lens and imaging unit

Conventional surface roughening plating technology cannot always improve the adhesion between a leadframe and a plating film and it depends on the material used for surface roughening plating. Conventional surface roughening technology by etching can only be used for leadframes made of limited materials. Improved adhesion cannot therefore be achieved between a metal member such as leadframe and a sealing resin. A manufacturing method of a semiconductor device according to one embodiment is to carry out resin sealing using a metal member such as leadframe which has been subjected to alloying treatment of a base material and Zn plated on the surface thereof.

Semiconductor device and method of manufacturing the same

A semiconductor chip in which a power MOSFET is placed above a semiconductor chip in which another power MOSFET is formed and they are sealed with an encapsulation resin. The semiconductor chips are so arranged that the upper semiconductor chip does not overlap with a gate pad electrode of the lower semiconductor chip in a plan view. The semiconductor chips are identical in size and the respective source pad electrodes and gate pad electrodes of the lower semiconductor chip and the upper semiconductor chip are identical in shape and arrangement. The lower semiconductor chip and the upper semiconductor chip are arranged with their respective centers displaced from each other. Accordingly, the size of a semiconductor device can be reduced.

Semiconductor device for a DC-DC converter

A zoom lens includes a first lens group having a positive refracting power and normally fixed in position, a second lens group having a negative refracting power and movable along an optical axis, and a third lens group having a positive refracting power and normally fixed in position, disposed in order from the object side to the image side. Two thirds or more of lenses of the first to third lens groups are formed from a resin material. The zoom lens satisfies the following conditional expressions (1) and (2):4.0&#x3c;&#x2003;&#x2003;(1)&#x2212;100.0&#x3c;1 to 3/&#x3c;&#x2212;6.4&#x2003;&#x2003;(2)where fw is a focal length of the entire lens system at the wide angle end, ft a focal length of the entire lens system at the telephoto end, and f1 to 3 a combined focal length of the first to third lens groups at all zoom positions.

Zoom lens and image pickup apparatus

An imaging lens including: in order from an object side thereof, a first lens having a positive refractive power; a second lens formed in a meniscus shape having a negative refractive power with a concave surface faced to an image side; a third lens formed in a biconvex shape having a positive refractive power near an optical axis; a fourth lens formed in a meniscus shape having a positive refractive power with a concave surface faced to the object side near the optical axis; and a fifth lens having a negative refractive power near the optical axis and a positive refractive power in a peripheral portion, the imaging lens satisfying the following conditional expression (a), 3.0&#x2266;f3/f4&#x2266;30.0 (a) where f3 is a focal length of the third lens, and f4 is a focal length of the fourth lens.

Imaging lens and imaging apparatus

An image capture lens includes, in following order from an object side, a first lens made of glass which has a meniscus shape with a convex surface facing the object side and has positive refractive power, an aperture stop, a second lens made of glass which has a meniscus shape with a convex surface facing an image side and has negative refractive power, and a third lens made of resin which has a convex surface facing the object side and has positive refractive power. The image capture lens satisfies following conditional formulae (1) and (2):2/&#x3c;&#x2212;3.5, and&#x2003;&#x2003;(1)3/&#x3e;3.5,&#x2003;&#x2003;(2)where

Image capture lens and image capture apparatus

Provided is a zoom lens including a first lens group, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, wherein conditional expressions f/fw&#x3e;2.0, f/fw&#x3c;&#x2212;2.0, &#x2212;2.0&#x2266;f/f&#x2266;&#x2212;0.5, and &#x3bd;d&#x2212;&#x3bd;d&#x3e;20 are satisfied, where fis a focal length of a single lens having a positive refractive power in the first lens group, fis a focal length of the second lens group, fw is a focal length of the total lens system at a wide angle end, &#x3bd;dis an Abbe number of the lens having a negative refractive power in the second lens group for the d-line, and &#x3bd;dis an Abbe number of the lens having a positive refractive power in the second lens group for the d-line.

This is addressed to provide a zoom lens which has a good optical performance for imaging device having a large number of pixels even with its simple construction, and which can also be small and thin in structure, and an imaging apparatus using the zoom lens. A zoom lensis composed by arranging, in the following order from an object side, a first lens group GRhaving a weak refractive power, a second lens group GRhaving a negative refractive power, a third lens group GRhaving a positive refractive power, and a fourth lens group GRhaving a positive refractive power, and is configured to perform zooming by moving the second lens group and the third lens group. The first lens group is composed by arranging, in the order from an object side, a single lens Ghaving a a negative refractive power, a prism Gfor folding an optical path, and a single lens Ghaving a a positive refractive power. The second lens group is composed of one single lens Ghaving a negative refractive power, and satisfies the following conditional formula (1):2/&#x3c;0.4&#x2003;&#x2003;(1)where trepresents the center thickness of the single lens having a negative refractive power constituting the second lens group, and fw represents the focal length of a whole lens system at a wide-angle position.

Zoom lens and imaging apparatus

An image capture lens includes, in following order from an object side, a first lens made of glass which has a meniscus shape with a convex surface facing the object side and has positive refractive power, an aperture stop, a second lens made of glass which has a meniscus shape with a convex surface facing an image side and has negative refractive power, and a third lens made of resin which has a convex surface facing the object side and has positive refractive power. The image capture lens satisfies following conditional formulae (1) and (2):2/&#x3c;&#x2212;3.5, and&#x2003;&#x2003;(1)3/f&#x3e;3.5,&#x2003;&#x2003;(2)where f: focal length of the entire lens system;

In the present invention, an episulfide compound having, in one molecule, at least one epithio structure represented by the following Formula 2: wherein Ris C1-C10 hydrocarbylene or single bond, R, Rand Rare each independently C1-C10 hydrocarbyl or hydrogen, Y is O, S, Se or Te, p is an integer from 1 to 5 and q is an integer from 0 to 5,is polymerized in the presence of a halide of a 13-16 group element of the long periodic table and/or a polymerization regulator represented by the following Formula 1: wherein R, Rand Rare each C1-C10 hydrocarbyl or hydrogen, Ris C1-C10 hydrocarbylene or single bond, X is F, Cl, Br, I, As, SH, OH, C1-C10 alkoxyl, C1-C10 alkylthio, or C1-C10 mercaptoalkylthio, and m is an integer from 1 to 5, to produce a cured resin suitable as an optical material. By using the polymerization regulator, the polymerization rate of the episulfide compound can be suitably regulated to obtain a cured resin with less defect. By using the halide, the increase in the viscosity of the starting composition during the storage or the casting operation can be prevented.

Polymerization regulator and composition for resin

A zoom lens with a reduced thickness and size in the depthwise direction consists of a plurality of lens groups (GRto GR), so that it varies in power in response to variation in intervals between the lens groups. The zoom lens also has a prism Gto bend the optical axis passing through the lens groups (GRto GR). The last lens group G(counted from the object side) is composed of a negative lens group and a positive lens group, with an air layer interposed between them (arranged sequentially from the object side). The present invention also provides an imaging device equipped with an imaging element to convert the optical images formed by said zoom lens into electrical signals.

Growing community of inventors

Kanagawa, Japan

Masaki Tamura