[go: up one dir, main page]

TWI222061B - Optical component and optical sensor using same - Google Patents

Optical component and optical sensor using same Download PDF

Info

Publication number
TWI222061B
TWI222061B TW091100080A TW91100080A TWI222061B TW I222061 B TWI222061 B TW I222061B TW 091100080 A TW091100080 A TW 091100080A TW 91100080 A TW91100080 A TW 91100080A TW I222061 B TWI222061 B TW I222061B
Authority
TW
Taiwan
Prior art keywords
laser beam
incident
diffractive
plane
optical
Prior art date
Application number
TW091100080A
Other languages
Chinese (zh)
Inventor
Shoichi Kyotani
Original Assignee
Alps Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Application granted granted Critical
Publication of TWI222061B publication Critical patent/TWI222061B/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G11B7/1275—Two or more lasers having different wavelengths
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2545—CDs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

An optical component is disclosed, wherein laser beams 13a', 13b' with different oscillating wavelengths are incident with their optical axes mutually in parallel, it comprises: the incident plane 30a of each incident laser beam 13a', 13b'; exit plane 30b to exit each laser beam 13a', 13b' incident onto the incident plane 30a; it also comprises: the first diffractive grating 30f formed on the incident plane 30a, so that each laser beam 13a', 13b' transmits with different diffractive angles according to the oscillating wavelengths of each laser beam 13a', 13b'; the second diffractive grating 30g formed on the exit plane 30b, so as to diffract again the laser beam 13a', 13b' diffracted by the first diffractive grating 30f with the diffractive angles corresponding to the oscillating wavelengths. The optical axes of the diffractive light of each laser beam 13a', 13b' emitted from the exit plane 30b toward the exterior are coincident.

Description

經濟部智慧財產局員工消費合作社印製 上述各雷射的繞射光分別是在上述第1繞射光柵及上 述第2繞射光柵上被繞射的1次繞射光。 5 · —種光拾取器，使用申請專利範圍第1項或第2項 上述的光學構件，其特徵在於：包括： 具有分別射出上述各雷射光並使其光軸相互平行的2 個光源的2波長雷射二極體； 使從上述2波長雷射二極體射出的上述各雷射光入射 到上述入射面的上述第1繞射光柵上的上述光學構件； 使被上述第1繞射光柵繞射，又被上述光學構件的上 述第2繞射光柵繞射之後射出的光軸保持一致後的上述各 雷射光的繞射光聚束的物鏡； 聚束後的上述各雷射光的繞射光被DVD或CD光碟反射 ，使相對於該反射的各雷射光的各返回光透射上述物鏡、 上述光學構件後，入射到具有受光元件的受光構件上。 (請先閲讀背面之注意事項再填寫本頁) 紙 本 準 標 家 國Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The above-mentioned diffraction light of the laser is the first diffraction light that is diffracted on the first diffraction grating and the second diffraction grating. 5 · An optical pickup using the above-mentioned optical member of the first or second patent application range, characterized in that it includes: 2 having 2 light sources each emitting the above laser light and making their optical axes parallel to each other A wavelength laser diode; the optical member for allowing the laser light emitted from the two-wavelength laser diode to be incident on the first diffraction grating on the incident surface; and being wound by the first diffraction grating An objective lens that diffracts the diffracted light of each of the laser light after the optical axis that is diffracted by the second diffraction grating of the optical member is kept consistent; the diffracted light of each of the laser light after being focused is DVD Or the CD disc reflects, and each return light of each reflected laser light is transmitted through the objective lens and the optical member, and then incident on a light receiving member having a light receiving element. (Please read the notes on the back before filling out this page) Paper Standard Country

A4 V—/ S N 釐 9 2A4 V— / S N 0.19 2

TW091100080A 2001-02-26 2002-01-04 Optical component and optical sensor using same TWI222061B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001051223A JP2002250809A (en) 2001-02-26 2001-02-26 Optical member and light pickup using the same

Publications (1)

Publication Number Publication Date
TWI222061B true TWI222061B (en) 2004-10-11

Family

ID=18912051

Family Applications (1)

Application Number Title Priority Date Filing Date
TW091100080A TWI222061B (en) 2001-02-26 2002-01-04 Optical component and optical sensor using same

Country Status (4)

Country Link
JP (1) JP2002250809A (en)
KR (1) KR100427828B1 (en)
CN (1) CN1372259A (en)
TW (1) TWI222061B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI394152B (en) * 2007-07-30 2013-04-21 Sony Corp Objective lens, optical read / write head and optical disc device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002311221A (en) * 2001-04-18 2002-10-23 Alps Electric Co Ltd Optical member and optical device which uses the same
JP4148761B2 (en) * 2002-11-26 2008-09-10 アークレイ株式会社 Test tool detection mechanism and analyzer equipped with this detection mechanism

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597249B1 (en) * 1986-04-11 1988-06-17 Thomson Csf OPTICAL READING DEVICE FOR OPTICAL RECORDING MEDIUM
JPH0770065B2 (en) * 1988-04-20 1995-07-31 シャープ株式会社 Optical pickup device
JPH0391125A (en) * 1989-09-01 1991-04-16 Ricoh Co Ltd Optical pickup device using wavelength multiplexing recording method
KR100200848B1 (en) * 1995-06-26 1999-06-15 윤종용 Dual Focus Formation Method and Optical Pickup Using the Same
JP2001176110A (en) * 1999-12-13 2001-06-29 Alps Electric Co Ltd Optical pickup device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI394152B (en) * 2007-07-30 2013-04-21 Sony Corp Objective lens, optical read / write head and optical disc device

Also Published As

Publication number Publication date
KR100427828B1 (en) 2004-04-28
CN1372259A (en) 2002-10-02
KR20020069476A (en) 2002-09-04
JP2002250809A (en) 2002-09-06

Similar Documents

Publication Publication Date Title
EP1172808A3 (en) Optical pickup
EP0401764A3 (en) Semiconductor laser optical head assembly
EP1801798A4 (en) Diffraction optical element, objective lens module, optical pickup, and optical information recording/reproducing apparatus
JP2002116314A5 (en)
TW526339B (en) Compatible optical pickup
TWI222061B (en) Optical component and optical sensor using same
JPH02165684A (en) Semiconductor laser device
TW552433B (en) Grating member
TW417106B (en) Optical pickup device using hologram pattern and hologram pattern generation method
WO2008105265A1 (en) Diffraction optical element and optical pickup device
CN110543090B (en) Optical processing system and optical processing method
JP2001155375A (en) Optical head device
AU2003280751A1 (en) Double-wavelength light source unit and optical head device
KR970007871A (en) Optical pickup device
US7358470B2 (en) Optical pickup
ATE506675T1 (en) OPTICAL READING HEAD AND OPTICAL DEVICE
TWI358727B (en) Integrated optical read-write apparatus
TWI242191B (en) Optical pickup apparatus having beam splitter on which hologram is formed and method of compensating for deviation between optical axes using the optical pickup apparatus
US20060118704A1 (en) Optical pickup device and optical element
JP2005203004A5 (en)
JP3622777B2 (en) Image reading optical system and image reading optical apparatus
TW484132B (en) Composite optical member and method of inspecting the same
JP2002237082A (en) Optical pickup
JP4324523B2 (en) Optical element
JP2000123393A (en) Optical pickup device

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees