Olympus Corporation

Olympus Imaging Corporation

Keigo Matsuo

Hisashi Goto

Kanato Adachi

Shinichi Mihara

Koji Matsumoto

Keisuke Ichikawa

Kazuaki Murayama

Yasunobu Iga

Hideki Nagata

Takayuki Mimura

Shingo Kato

Kazumi Ito

Toshio Takahashi

Toshiyuki Noguchi

Ayami Imamura

Hiroshi Takase

Satoru Ito

Ryuhi Okubo

Daichi Murakami

Yoshikazu Ichikawa

An imaging system includes: an imaging optical system; an imaging element having a two-dimensional pixel array; a drive unit that drives at least one of a focus lens and the imaging element; an IPSF selection unit that selects an IPSF that is used for image generation from among a plurality of IPSFs stored in an IPSF storage unit; and an image generator that generates an image using the selected IPSF.

Imaging system adapted to perform focal sweep imaging, processing apparatus, and endoscope

An illumination unit emits an illumination light to a specimen. An image sensor includes multiple pixels arranged in a two-dimensional manner. The image sensor captures an image of the intensity distribution of an interference pattern formed due to the illumination light that has interacted with the specimen, and outputs image data. A defect information acquisition unit acquires defect position information that indicates the positions of defective pixels of the image sensor. A processing unit reconstructs a subject image that represents the specimen based on the image data and the defect position information.

Digital holographic imaging apparatus

A digital holographic image-taking apparatus includes an illumination portion having a light emission surface for emitting illumination light toward an object, the illumination light having a specific wavelength in a coherent plane waveform; and an image sensor having an pixel array including two-dimensionally arranged pixels, the image sensor capturing an interference pattern generated based on the illumination light having acted on the object, in which the following conditional expression is satisfied: 0.0000001&#x3c;Z/S&#x3c;16, where S represents the area of the light emission surface, and Z represents the distance from the light emission surface to the pixel array.

Digital holographic image-taking apparatus

A focus adjustment device comprises an image sensor having imaging pixels and focus detection pixels, which subjects light flux that is passed through a photographing lens to photoelectric conversion and outputs an image signal, a first memory which stores information relating to incident angle range of light flux that is incident towards the image sensor, a second memory which stores information relating to characteristics of the image sensor, and a calculation section which calculates information for focus adjustment based on output of the first memory and output of the second memory.

Focus adjustment device, imaging device and focus adjustment method

A photographing apparatus has a body portion to which a lens portion is mountable and to which an image forming luminous flux is conducted from the lens portion, and the photographing apparatus includes an image pickup device having pixels for image pickup and pixels for focus detection, a storage section that retains information of sensitivity characteristics of the pixels for focus detection, and a control amount calculation section that obtains information about an incident angle and an angular range of the image forming luminous flux from the lens portion and calculates information for focus control based on the obtained information and information read from the storage section. The focus control of high precision is enabled with simple configuration, irrespective of a lens system.

Photographic apparatus, camera system and methods for calculating focus control information based on a distance between centers of gravity distributions of light receiving sensitivities

Provided are a variable power optical system in which the value of the entire length with respect to the image height is reduced and the aberration is well corrected, and an image pickup device comprising the same. Specifically provided is a variable power optical system comprising, in order from the object side, at least a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power, wherein the variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element, the second lens element has a convex shape on the object side, and the final lens group comprises a positive lens, the variable power optical system satisfying the following conditional expression:10&#x2266;&#x2266;45&#x2212;1.0&#x3c;(22)/(22)&#x3c;1.0where VdLg is the Abbe number of the positive lens of the final lens group with respect to the d line, Ris the curvature radius of the object-side surface of the second lens element, and Ris the curvature radius of the image-side surface of the third lens element.

Variable power optical system and image pickup apparatus having the same

An image pickup apparatus of the invention includes: an optical imaging system; an image pickup device; a defocus quantity calculation section for calculating a defocus quantity based on a phase difference between signals for focus detection obtained from pixels for focus detection; a high-frequency component quantity detection section for detecting a quantity of high-frequency component contained in a pixel signal outputted from a pixel other than the pixels for focus detection; a region determination section for determining in accordance with which of the defocus quantity and the high-frequency component quantity the optical imaging system is to be driven, according to a detection result of detecting in which of a plurality of divided blocks of the image pickup device an object of interest is present; and a focusing section for driving the optical imaging system in accordance with a determination result of the region determination section.

Image pickup apparatus

Provided are a variable power optical system in which the value of the entire length with respect to the image height is reduced and the aberration is well corrected, and an image pickup device comprising the same. Specifically provided is a variable power optical system comprising, in order from the object side, at least a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power, wherein the variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element, the second lens element has a convex shape on the object side, and the final lens group comprises a positive lens, the variable power optical system satisfying the following conditional expression:10&#x2266;&#x2266;45&#x2212;1.0&#x3c;(22)/(22)&#x3c;1.0where VdLg is the Abbe number of the positive lens of the final lens group with respect to the d line, R2a is the curvature radius of the object-side surface of the second lens element, and R2b is the curvature radius of the image-side surface of the third lens element.

An image pickup apparatus, includes a computing section which computes a defocus amount which has been estimated, a calculating section which calculates an accuracy of defocus detection, a setting section which sets a correction value from a result of the calculating section, a correcting section which corrects the correction value obtained from the result of the setting section, to reduce an absolute value of the defocus amount which has been estimated, a lens-drive amount calculating section which calculates a lens-drive amount based on a result from the correcting section, and a control section which, at the time of video photography, carries out focusing successively by using the defocus amount and the lens drive amount obtained from the computing section, the calculating section, the setting section, and the correcting section.

The image pickup apparatus of the present invention includes: an optical imaging system for forming an object image; an image pickup device including a plurality of pixels that photoelectrically converts the object image; a defocus quantity calculation section for calculating a defocus quantity based on a phase difference between a plurality of signals for focus detection obtained from a plurality of pixels for focus detection that respectively receive a light flux that passes through a different pupil region of the optical imaging system; a focusing section for driving the optical imaging system so as to achieve an in-focus state, in accordance with the defocus quantity calculated at the defocus quantity calculation section; an addition practicability determination section for determining a practicability of performing inter-frame addition on a plurality of signals for focus detection before calculating the defocus quantity, based on an analysis result of a signal component of the object image; and an inter-frame addition processing section for performing inter-frame addition based on a determination result of the addition practicability determination section.

Image pickup apparatus with inter-frame addition components

An image pickup apparatus includes: an image pickup device that includes a pixel used for focus detection, a plurality of the pixels being arranged in a matrix; a correction memory that stores correction information used for correcting a difference in amounts of received light that depend on pixel positions of the pixels used for focus detection; a correcting section that reads the correction information to correct a pixel value of the pixel used for focus detection; and a focus detecting section that detects a focal point by using the pixel value corrected by the correcting section. Focus accuracy is increased by correcting the pixel value for an AF pixel depending on the pixel position.

Image pickup apparatus and image pickup device for performing auto-focusing

An image pickup apparatus includes: an optical imaging system; an image pickup device; a defocus quantity calculation circuit for calculating a defocus quantity based on a phase difference between a plurality of signals for focus detection obtained from a plurality of pixels for focus detection that respectively receive a light flux that has passed through a different pupil region of the optical imaging system; a focusing section for driving the optical imaging system so as to achieve an in-focus state in accordance with the calculated defocus quantity; and a thinning-out circuit for thinning out a plurality of signals for focus detection that are not used for calculating the defocus quantity, based on an analysis result of a signal component of an object image.

Image pickup apparatus with thinning-out section

An image pickup apparatus in which, a taking lens is installable or fixed, includes The pixels include focal-point detection pixels which are arranged to restrict a direction of incidence of a light beam which is incident, and image-pickup pixels which are arranged such that, the direction of incidence of the light beam which is incident is not restricted more than the direction of incidence restricted by the focal-point detection pixel. The focal-point detection pixel outputs at least a signal for ranging, and the image-pickup pixel outputs at least a signal for an image. The image pickup apparatus includes an overflow judging section which judges whether or not the photoelectric conversion portion has overflowed, and a calculating section which calculates an amount of defocus based on a judgment result of the overflow judging section and the signal for ranging.

A variable power optical system includes, in order from the object side, a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power. The variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element. The second lens element has a convex shape on the object side. The final lens group includes a positive lens. The variable power optical system satisfies the following conditions:10&#x2266;&#x2266;45&#x2212;1.0&#x3c;(22)/(22)&#x3c;1.0where VdLg is the Abbe number of the positive lens of the final lens group with respect to the d line, Ris the curvature radius of the object-side surface of the second lens element, and Ris the curvature radius of the image-side surface of the third lens element.

A zoom optical system comprising, in order from the object side, a first lens unit with negative power, a second lens unit with positive power, a third lens unit with positive power, and a fourth lens unit, wherein spacing between the first lens unit and the fourth lens unit is fixed to an image surface, and the second lens unit and the third lens unit are moved on an optical axis so as to change spacings between the respective lens units when the magnification of the zoom optical system is changed. The third lens unit comprises lens elements more than three, including an aperture stop, at least a lens element with positive power and at least a lens element with negative power, and the most image-side lens element of the third lens unit is a meniscus lens element with a concave surface facing the image side.

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Akiruno, Japan

Keigo Matsuo