Sony Corporation

Hiroaki Yukawa

Kensaku Maeda

Satoshi Imai

Yasushi Maruyama

Satoshi Nakano

Tomohiko Baba

Taizo Takachi

Katsutoshi Sato

Midori Kanaya

A solid-state imaging device includes: a light-receiving element; and a multilayer film which is disposed on a side of a light-receiving surface of the light-receiving element and is formed by laminating a plurality of layers made of materials having different refractive indices, in which a defect layer is included in at least one of the laminated layers, wherein in the defect layer, a plurality of kinds of materials having different refractive indices coexist in a surface parallel to the light-receiving surface.

Solid-state imaging device and electronic apparatus

An imaging device includes: an optical sensor including a light receiving unit capable of forming an object image; a seal material for protecting the light receiving unit of the optical sensor; an intermediate layer formed at least between the light receiving unit and an opposite surface of the seal material facing the light receiving unit; and a control film arranged between the intermediate layer and the opposite surface of the seal material, wherein, in the control film, a cutoff wavelength is shifted to a shortwave side in accordance with an incident angle of light which is obliquely incident on the film.

Imaging device and camera module

A solid state imaging device includes: a sensor unit that has a semiconductor substrate in which pixels including photoelectric conversion parts are disposed in an array on a light receiving surface; a lens module which has a plurality of optical members including a lens and which is disposed such that light including information on an image to be imaged is incident on the light receiving surface of the sensor unit; and a phase shift mask in which regions for dividing all light beams into a plurality of groups are set and which makes a different phase shift occur in each of the regions for the light.

Solid state imaging device and electronic apparatus

The present invention provides an optical pickup in which the transmission diffraction efficiency of plural recording and/or reproducing light beams of different wavelengths, radiated from plural light sources, may be prevented from being lowered, and in which the transmission diffraction efficiency and the angle of diffraction are both optimized. The optical pickup includes an imaging unit composed of an objective lens and a set of diffraction section and adapted for condensing light beams from first to third light sources on optical recording mediums, and the set of diffraction section includes a first diffraction section which gives the transmission diffraction efficiency for order-one diffracted light or order-minus-one diffracted light higher than that for light of the other orders in case light beams of first, second and third wavelengths are transmitted therethrough, and a second diffraction section which gives the transmission diffraction efficiency for order-zero diffracted light higher than that for light of the other orders in case the light beam of the shortest wavelength and the light beam of the longest wavelength out of the first, second and third wavelengths are transmitted therethrough, and the transmission diffraction efficiency for order-one diffracted light or order-minus-one diffracted light higher than that for diffracted light of the other orders in case the remaining light beam is transmitted therethrough.

Optical pickup including plural light sources and recording and/or reproducing apparatus for an optical recording medium

An optical pickup includes a diffracting element having a plurality of regions for dividing the laser light emitted from the light-emitting element into a main beam and pairs of first, second, third, and fourth sub-beams. When the first to fourth sub-beams form first to fourth sub-spots, respectively, in that order along a radial direction on a recording surface of an arbitrary kind of disc-shaped recording medium which does not have the largest track pitch, n is a natural number, and the track pitch is Pa, the distance Dabetween the first and second sub-spots is approximately (2n&#x2212;1)&#xd7;Pa/2, the distance Dabetween the third and fourth sub-spots is approximately (2n&#x2212;1)&#xd7;Pa/2, the distance Dabetween the first and third sub-spots is approximately (2n&#x2212;1)&#xd7;Pa, and the distance Dabetween the second and fourth sub-spots is approximately (2n&#x2212;1)&#xd7;Pa.

Optical pickup and disc drive apparatus

An optical pickup device is adapted to read information signals from optical recording media of two different types such as a 'DVD' and a 'CD' for which two light beams with different wavelengths are used and comprises a photodetector having a single light receiving section that can be shared by optical recording media of two different types. Both the light beam reflected from the signal recording surface of the &#x201c;DVD&#x201d;and the light beam reflected from the signal recording surface of the &#x201c;CD&#x201d;are diffracted by the diffraction elementand focused to a same spot on the light receiving surface of the photodiode of a photodetector

Optical pickup device and optical disk device having a diffraction element so that a first light beam and a second light beam comport with each other

An optical head includes a light emitter/detector to emit a laser light towards an optical disc and to detect a return light from the optical disc, a diffraction grating to split the laser light into three beams, and a light converging optical system to focus the laser light on a recording surface of the optical disc. The diffraction grating has formed therein a plurality of slits formed whose depth is selected so that the efficiency of diffraction of first-order light when a first light beam is incident upon the diffraction grating is higher than that when a second light beam having a longer wavelength than the first light beam is incident upon the diffraction grating.

Optical head, optical recording and/or reproducing apparatus and integrated optical module

An optical pickup device is adapted to read information signals from optical recording media of two different types such as a 'DVD' and a 'CD' for which two light beams with different wavelengths are used and comprises a photodetector having a single light receiving section that can be shared by optical recording media of two different types. Both the light beam reflected from the signal recording surface of the &#x201c;DVD&#x201d;and the light beam reflected from the signal recording surface of the &#x201c;CD&#x201d;are diffracted by the diffraction elementand focussed to a same spot on the light receiving surface of the photodiode of a photodetector

Diffractive optical element with a pair of opposite surfaces projecting light on a photodetector

Optical pickup device and optical disk device having a diffraction grating

The disclosed invention relates to an optical integrated device, an optical pickup, and an optical disk apparatus, and is applicable to an optical disk apparatus for playing back a compact disk (CD) and a DVD (Digital Video Disk), thereby to access a plurality of types of optical disks with a simple arrangement. For dividing feedback light with a hologram A and detecting the divided feedback light with a light-detecting element , laser sources A, B having different wavelengths are spaced a predetermined distance D from each other in order to compensate for the difference between the diffraction angles &thgr;A , &thgr;B of the hologram A.

Growing community of inventors

Kanagawa, Japan

Hiroaki Yukawa