Sony Corporation

Sony Semiconductor Solutions Corporation

Koji Sekiguchi

Kimihiro Saito

Tetsuji Yamaguchi

Kenichi Murata

Hideaki Togashi

Masahiro Joei

Shintarou Hirata

Yuta Hasegawa

Toshihiro Horigome

Nobuhiro Kawai

Kotaro Kurokawa

Yoshito Nagashima

Kenji Yamamoto

Kazuhiko Fujiie

Takahiro Miura

Ariyoshi Nakaoki

Naoto Kojima

Yoshinori Suzuki

Osamu Kawakubo

Kazuhiko Fujie

A highly functional photoelectric conversion element is provided. The photoelectric conversion element includes: a first photoelectric converter that detects light in a first wavelength range and photoelectrically converts the light; a second photoelectric converter that detects light in a second wavelength range and photoelectrically converts the light to obtain distance information of a subject; and an optical filter that is disposed between the first photoelectric converter and the second photoelectric converter, and allows the light in the second wavelength range to pass therethrough more easily than the light in the first wavelength range. The first photoelectric converter includes a stacked structure and an electric charge accumulation electrode. The stacked structure includes a first electrode, a first photoelectric conversion layer, and a second electrode that are stacked in order, and the electric charge accumulation electrode is disposed to be separated from the first electrode and be opposed to the first photoelectric conversion layer with an insulating layer interposed therebetween.

Photoelectric conversion element, photodetector, photodetection system, electronic apparatus, and mobile body

A reproduction apparatus dividing a cross section of superposed light into a plurality of regions in a tangential and/or radial direction includes: an optical system configured to generate each of a first set of signal light and reference light having a phase difference of approximately 0&#xb0;, a second set of signal light and reference light having a phase difference of approximately 180&#xb0;, a third set of signal light and reference light having a phase difference of approximately 90&#xb0;, and a fourth set of signal light and reference light having a phase difference of approximately 270&#xb0;, using a plurality of superposed light beams corresponding to the divided regions; an optical receiver configured to output signals corresponding to the sets of the signal light and the reference light; and a circuit configured to compute signals as differences between the signals, and obtain a reproduction signal by computation from the computed signals.

Reproduction apparatus and reproduction method

Provided is a reproducing apparatus including: a reproduction signal generating circuit that calculates a first difference signal which is a difference between a first light receiving signal obtained by the first light receiving element and a second light receiving signal obtained by the second light receiving element, and a second difference signal which is a difference between a third light receiving signal obtained by the third light receiving element and a fourth light receiving signal obtained by the fourth light receiving element, and uses the first difference signal, the second difference signal, a phase difference between a crosstalk component and an average phase of the signal light beam, and an optical path length difference between the signal light beam and the reference light beam to obtain a reproduction signal; and a phase extraction circuit that obtains a successive change amount and updates with a successive variation.

Reproducing apparatus and reproducing method

A set of first signal light and reference light with a phase difference of almost 0 degree, a set of second signal light and reference light with a phase difference of almost 180 degrees, a set of third signal light and reference light with a phase difference of almost 90 degrees, and a set of fourth signal light and reference light with a phase difference of almost 270 degrees are generated. A first differential signal as a difference between a first light-receiving signal obtained by a first light-receiving element and a second light-receiving signal obtained by a second light-receiving element is calculated, and a second differential signal as a difference between a third light-receiving signal obtained by a third light-receiving element and a fourth light-receiving signal obtained by a fourth light-receiving element is calculated. The first differential signal and the second differential signal are supplied to respective FIR filters. An equalization error is formed from output signals from the FIR filters. Tap coefficients for the FIR filters are controlled to minimize the equalization error.

Playing apparatus and playing method

Provided is a reproducing apparatus including: an optical system that obtains a signal light by radiating light emitted from a light source and generates a reference light from the light emitted from the light source, with respect to a recording medium, and that generates first to fourth groups of the signal light beams and the reference light beams, with respect to the superposed light in which the signal light and the reference light are superposed onto each other; a light receiving unit that receives light beams of the first to fourth groups of the signal light beams and the reference light beams respectively through first to fourth light receiving elements; and a reproduction signal generation circuit that calculates a first differential signal and a second differential signal, and that generates a reproduction signal by performing an arithmetic operation using the first and second differential signals.

A reproducing device includes a light generation and emission unit that obtains signal light as reflection light, which reflects recording signals of a land and a groove, by irradiating an optical recording medium with light and generates reference light so as to emit the signal light and the reference light in a superposed manner, a detection optical system that generates a first combination of signal light and reference light, a second combination of signal light and reference light, a third combination of signal light and reference light, and a fourth combination of signal light and reference light respectively, a light receiving unit in which the first to fourth combinations of signal light and reference light are respectively received by first to fourth light receiving elements, and a reproduction unit that reproduces the recording signals of the land and the groove on the basis of first to fourth light receiving signals.

Reproducing device and reproducing method

Provided is an optical recording medium, including a recording target track that is a track on which small record carriers are arranged and on which information recording is performed by modulating the small record carriers through light irradiation; and a wobbling track on which the small record carriers are arranged in a wobbling manner, wherein a single wobbling track is formed to run parallel to a set of a plurality of recording target tracks.

Optical recording medium, recording/reproducing apparatus, recording/reproducing method

A signal detecting device includes: a semiconductor substrate; a near-field light generating section that is provided on the semiconductor substrate and generates near-field light near an interface with the semiconductor substrate; a light source that outputs light having wavelength corresponding to photon energy about a half as large as band-gap energy of a material of the semiconductor substrate; and a current detecting unit that detects a photocurrent generated in the semiconductor substrate when the near-field light is generated.

Growing community of inventors

Kanagawa, Japan

Koji Sekiguchi