Patent EP0532175A1 successfully refreshed from Google Patents.
EP0532175A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical device utilizing superresolution effect
Assignee: Sharp Corp
•
Filing: 1992-08-10
•
Granted: —
•
Expires: 2012-08-10
Abstract
Abstract An optical device which is miniaturized by allowing light to operate in a confined space. Such optical devices are particularly suitable for optical pick-up devices, laser printers, and sensors, which require little space and light weight, wherein the optical device includes an integrated type and a substrate type. The device comprises a system of optical components including a light source, lens, beamsplitter, mirror and optical detector and is such that one of the components blocks or otherwise diminisher the intensity of such a central portion of the beam in order to reduce the spot size via the superresolution effect.
Inventors
- 👤 Toshihiko Yoshida
- 👤 Osamu Yamamoto
- 👤 Saburo Yamamoto
- 👤 Shohichi Kato
- 👤 Masumi Nakamichi
- 👤 Toshimasa Hamada
- 👤 Sadayoshi Matsui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:46
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/12; G11B7/135; G11B7/1372; G11B7/1374; G02; G02B; G02B27/00; G02B27/58; G11B7/123; G11B7/1381
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
An optical device comprising an optical system of optical components including a light source, a lens, a beam splitter, a reflecting mirror, and an optical detector, the optical system being disposed in the path of light, wherein one of the optical components allows a light beam from the light source to pass or reflect on and comprises a central portion where the light beam is not passed or reflected, respectively.
Claim 2
Dependent Claim
86 words
An optical device comprising an optical system of optical components including a light source, a lens, a beam splitter, a reflecting mirror, and an optical detector, the optical system being disposed in the path of light, wherein one of the optical components allows a light beam from the light source to pass or reflect on and comprises a central portion which differentiates the optical characteristics of a light beam passing through said central portion from those of a light beam passing through the peripheral portion thereof.
Claim 3
Dependent Claim
73 words
An optical device comprising a light transmissive substrate, an optical system of optical components including a light source, a lens, a beam splitter, a reflecting mirror, and an optical detector disposed in the path of light on the substrate, wherein one of the optical components allows a light beam from the light source to pass or reflect on and comprises a central portion where the light beam is not passed or reflected, respectively.
Claim 4
Dependent Claim
79 words
An optical device comprising a light transmissive substrate, an optical system of optical components including a light source, a lens, a beam splitter, a reflecting mirror, and an optical detector disposed in the path of light on the substrate, which allows a light beam from the light source to pass or reflect on and comprises a central portion which differentiates the optical characteristics of a light beam from those of a light beam passing through the peripheral portion thereof.
Claim 5
Dependent Claim
68 words
An optical device comprising a light transmissive substrate, an optical system of optical components including a lens, a beam splitter, a reflecting mirror, and an optical detector disposed in the path of light on the substrate, wherein one of the optical components allows a light beam from outside to pass or reflect on and comprises a central portion where the light beam is not passed or reflected, respectively.
Claim 6
Dependent Claim
84 words
An optical device comprising a light transmissive substrate, an optical system of optical components including a lens, a beam splitter, a reflecting mirror, and an optical detector disposed in the path of light on the substrate, wherein one of the optical components allows a light beam from outside to pass or reflect on and comprises a central portion which differentiates the optical characteristics of a light beam passing through said central portion from those of a light beam passing through the peripheral portion thereof.
References Cited (Backward Citations)
US5025438A
Cited
EP0411525A2
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.