Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Photo & Lighting Co., Ltd.

Hirohiko Ina

Katsuji Ishikawa

Katsumi Horinishi

Katsunori Kawabata

Hajime Mitsui

Masatoshi Yamashita

Hisashi Ogura

Arata Sakamoto

Mitsuo Fuke

Takashi Umehara

Katsushi Sumisaki

Shohei Uno

Toshinori Maki

Naoyuki Furutsuka

Kazue Nakagawa

Takashi Kitamura

Takumi Iba

Nami Nagamori

Kazuhiro Hata

Kouichiro Matsuoka

Nobuo Yamashita

Masaki Tanabe

The present invention provides an image pickup lens with a large focal depth from the center to the outer part of an image plane formed on an image sensor and capable of maintaining its focal depth within a practical range and thus suppressing a decline in the resolution. An image pickup lensincludes, in order from the object side to the image plane side, an aperture stop, a first lensthat is a biconvex lens having positive power, a second lensthat is a meniscus lens having negative power and whose lens surface facing the object side is convex, a third lensthat is a meniscus lens having positive power and whose lens surface facing the object side is concave, and a fourth lensthat is a biconcave lens having negative power. The image pickup lensincludes a multifocal lens on the lens surface of the first lensfacing the object side. D and Ymax satisfy the following conditional expression ():0max&#x2266;0.1&#x2003;&#x2003;(1)where D is an absolute value of the distance between the multifocal lens surface and a surface of the aperture stop on the optical axis, and Ymax is the absolute value of the maximum image height on an image plane formed on the image sensor.

Image pickup lens, image pickup device using same, and portable apparatus equipped with the image pickup device

An image-capturing device includes a detector which detects that a resistance value of an actuator, made of shape memory alloy, is maintained within a predetermined range. The image-capturing device moves a lens step by step from a place corresponding to a first field in order to obtain image data from each one of the fields provided in a focus region. The image-capturing device also calculates a target place, where the lens should be finally positioned, by using the obtained image data, and then positions the lens at the calculated target place. The foregoing structure allows obtaining reliable and stable data.

Lens drive device, image-capturing device, and electronic apparatus with shape memory alloy actuator

The electronic flash unit disclosed comprises: a transformer () to vary voltages of a power supply; an accumulator () composed of a main capacitor () to charge an electric energy supplied from the transformer (); a lamp unit () provided with a flashlamp (), set inside of a reflector (), that flashes by discharging of energy storages in the main capacitor () upon applying a voltage on a trigger terminal (); and a trigger circuit () to generate the voltage to apply on the trigger terminal (), wherein at least the lamp unit () is coated with an insulation material.

Electronic flash unit and manufacturing method thereof

A lens unit including a first lens including a first lens section having a first optical axis along which light passes, and a second lens. The second lens includes a second lens section having a second optical axis along which light passes, and a flange provided at the outer circumferential part of the second lens section and having a surface opposed to the first lens, and a tubular section extending from the flange in the direction of the second optical axis and having an inner side face opposed to the second lens section. The first lens is fitted in the tubular section and in contact with the inner side face of the tubular section of the second lens. The tubular section of the second lens has a plurality of protrusions protruding in the direction of the second optical axis and a plurality of valleys provided between the protrusions.

Camera lens unit

An imaging apparatus includes of a lens holder arranged concentrically with an imaging element; a lens barrel having an imaging lens removably inserted from the leading end section side of the lens holder; a cover removably fitted at the leading end section of the lens holder; and a cam mechanism section arranged on the barrel, the lens holder and the cover so that the barrel turns around the optical axis to the imaging element and that the barrel moves in the optical axis direction. The cam mechanism section includes a first cam surface formed on the inner circumference surface of the lens holder; a cam protruding section formed on the outer circumference surface of the lens barrel; and a second cam surface formed on the inner surface of the cover. The cam mechanism section smoothly turns the barrel around the optical axis and moves the barrel in the optical axis direction.

Imaging apparatus

Growing community of inventors

Hyogo, Japan

Hirohiko Ina