Fujitsu Corporation

Fujitsu Frontech Limited

Fujitu Limited

Isao Iwaguchi

Mitsuo Watanabe

Hiroaki Kawai

Kozo Yamazaki

Motohiko Itoh

Shinichi Sato

Ichiro Shinoda

Hideo Miyazawa

Masanori Ohkawa

Shinichi Satoh

Mitsuharu Ishii

Munenori Ohtsuki

Hiroyuki Tanaka

Takahiro Aoki

Takashi Kaku

Soichi Hama

Takashi Yoshida

Yoshio Yoshizu

Kouichi Matsuo

Akihiro Nakamura

Toshimitsu Kumagai

Hiroyasu Murata

Toshitaka Aoki

Satoshi Fukui

Shuji Kimura

Tomoyuki Kashiwazaki

Koichi Matsuo

Tomohiko Fukawa

Yuki Hasegawa

Shinich Sato

An illumination optical system includes a plurality of light sources arranged in an annular shape, and a prism plate that is formed in an annular shape about an optical axis of illumination light from the light sources. The prism plate includes a prism surface, upon which the illumination light falls incident and on which prism a plurality of prisms arranged in an annular shape along a circumferential direction of the prism plate, are formed, a flat section upon which the illumination light falls incident and which is formed in an annular shape along the circumferential direction of the prism plate, and an emission plane that emits the illumination light. The prism surface is formed on an outer peripheral side outward from a radius of the prism plate that is centered on the optical axis, and the flat section is formed on an inner peripheral side inward from the radius.

Illumination optical system for imaging device

An optical element includes: a first transmissive sectionthat causes light emitted from a light source to be incident on the optical element; a first reflection sectionwhich is located at a facing section facing the first transmissive section and from which light incident from the first transmissive section is reflected; a second reflection sectionwhich is located around the first transmissive section and from which the light reflected from the first reflection section is reflected; and a second transmissive sectionthat causes the light reflected from the second reflection section to be emitted out of the optical element in an optical axis direction of the light source.

Beam generation optical system and image capturing apparatus provided with the same

An imaging device includes: an image sensor that images an object to be imaged through polarizing plates arranged to have a different polarization direction for each pixel in a pixel group that includes a plurality of pixels corresponding to each of points of the object to be imaged; a pixel selecting unit that selects a pixel having a lowest brightness for each of the pixel group corresponding to each of the points; and an image output unit that outputs a captured image of the object to be imaged that is generated from pixels selected by the pixel selecting unit.

Imaging device and imaging method selecting a pixel having a lowest brightness

A biometric image capturing apparatus includes an irradiating unit configured to irradiate a subject with light, a camera configured to capture an image of the subject, a polarizing unit which is disposed on an optical path between the irradiating unit and the camera, and configured to allow passage of light in a first polarization direction and light in a second polarization direction, a processor configured to perform computation using a first image captured by the camera according to the light in the first polarization direction that has passed through the polarizing unit and a second image captured by the camera according to the light in the second polarization direction that has passed through the polarizing unit, and to determine whether the subject is a biological body according to a result of the computation performed by the computing unit.

Biometric image capturing apparatus and biometric image capturing method

A device includes an illumination device that casts light of a prescribed polarization direction on a scattering body, a camera that picks up images of the scattering body at a plurality of different polarization angles, and a processor that executes a process of generating and outputting an inner layer image, of an inner layer of an inside of the scattering body, in response to a depth from a surface of the scattering body on the basis of the images of the scattering body picked up at the plurality of different polarization angles.

Image pickup device

An illumination optical system for an image pickup apparatus includes a plurality of light sources arranged in a circular loop pattern and a prism plate shaped like a circular loop. the prism plate includes a prism surface at which illumination light from the light sources enters and on which a plurality of prism columns arranged in a circular loop pattern in a circumference direction of the prism plate are formed and an outgoing surface from which the illumination light is emitted. the prism surface includes a flat portion on at least one of a peak formed by each of the plurality of prism columns and a trough formed between the plurality of prism columns. the flat portion is substantially parallel to a tangential direction of the prism plate.

Illumination optical system for image pickup apparatus

A liquid crystal panel includes an iris unit for limiting the incident range of light from an object to be shot, and a filter unit for assigning a exposure energy distribution varying with the position to incident light whose incident range is limited by the iris unit. The control unit controls the ON time and the OFF time of each pixel of the liquid crystal panel, and then a low pass filter operation on the captured image as an image processing can be optically replaced.

Imaging apparatus for reading information

A position Z of an image sensor is moved to an initial position A (image forming position) in a Z axis direction. An exposing operation is performed at a position A, and it is determined whether or not an exposing time counted by a timer has reached ta. If the exposing time has reached ta, an image sensoris moved to a position B. The exposing operation is performed at the position, and it is determined whether or not a total exposing time has reached ta+tb. If the total exposing time t has reached ta+tb, the image sensor is moved to a position C, and the exposing operation is performed at the position. Thus, the output distribution of the image sensor can be assigned a desired low pass filter characteristic.

The optical path of the light having spread at each point of an object to be shot is limited by an iris unit of a density filter. Since the density filter unit has a desired transmittance characteristic, the amount of the light passing through the density filter unit continuously changes from the center of the luminous flux toward the periphery. After the luminous flux forms an image on the image forming surface, it spreads toward the light-receptive surface of an image sensor, and becomes an image spreading on the light-receptive surface in a predetermined range.

An image capturing apparatus illuminates an object and captures an image of the object using the reflected light from the object. The image capturing apparatus includes an image sensor for capturing an image of the object by receiving reflected light, distance-measuring light-emitting devices for irradiating the object with spot light, and a control circuit for driving the distance-measuring light-emitting devices, detecting the spot light positions of the distance-measuring light-emitting devices from an image captured by the image sensor, and obtaining the distance to the object. The image sensor provided for capturing an image of the object can be used as a photodetector device for distance measurement. With this, it becomes unnecessary to separately provide a photodetector device for distance measurement, which enables miniaturization of the image capturing apparatus, as well as cost reduction.

Image capturing apparatus having distance measurement function

This invention relates to an image capturing apparatus for illuminating and capturing an image of an object using reflected light therefrom, and is objective to a miniaturized construction and simplified assembly. A plurality of light-emitting devices is mounted around an image sensor, and a light guide member guides the light of the light-emitting devices to an image capturing region for illumination. The image capturing apparatus having the closely disposed image capturing system and illumination system, the miniaturized image capturing apparatus is assembled by pressing a projection of the light guide member to the lower end of the hood for cutting outside lights from the image capturing range and by pressing the upper end of the hood to the filter. Thus, it becomes possible to assemble with less adhesion points and improve working ability of assemble of the image capturing apparatus to make defect ratios of productions low and improve production efficiency.

Image capturing apparatus having an image capturing system disposed close to an illumination system

An image capturing apparatus illuminate and captures an image of an object using reflected light from the object. In the apparatus, a plurality of light-emitting devices are mounted in the periphery of an image sensor, and the light of the plurality of light-emitting devices is guided to an image capturing region by a light guide member for illumination. On the image capturing apparatus having the image capturing system disposed close to the illumination system, a hood is provided for optically intercepting the image capturing system from the illumination system, with a flange disposed thereon. The light reflected on the upper face of a filter can be intercepted from being incident on an image capturing system unit. Accordingly, output light not irradiating the object and causing an image capturing noise can be intercepted, which is effective for a clear photographed image.

Image capturing for capturing an image of an object by illuminating the object and receiving light from the object

A plurality of bar-code candidate areas are calculated from scan data that is acquired by scanning a bar code. Feature data, which represents a specific feature, is calculated for each of the bar-code candidate areas. The bar-code candidate areas are evaluated based on their feature data to thereby determine a bar-code candidate area that has the highest probability of being a bar code. The specific feature includes any one or more of length of a differential waveform, average energy, and number of peaks in the differential waveform.

Bar-code reader and method of reading bar code

A bar code reader includes a first circuit board on which a photodiode, which receives light reflected from a bar code, is installed and a second circuit board on which a processing unit that processes a signal output from the photodiode. The position at which the first circuit board is placed can be decided irrespective of the position at which the second circuit board is placed. The first circuit board is placed at a position that is most suitable for receiving light reflected from the bar code.

Bar code reader and method of reading of bar code

A time for replacement of a laser diode is decided based on a value of operating current of the laser diode and a value of intensity of laser light output from the laser diode.

Growing community of inventors

Inagi, Japan

Isao Iwaguchi