JP4634627B2 - 光ピックアップ装置 - Google Patents

光ピックアップ装置 Download PDF

Info

Publication number
JP4634627B2
JP4634627B2 JP2001048359A JP2001048359A JP4634627B2 JP 4634627 B2 JP4634627 B2 JP 4634627B2 JP 2001048359 A JP2001048359 A JP 2001048359A JP 2001048359 A JP2001048359 A JP 2001048359A JP 4634627 B2 JP4634627 B2 JP 4634627B2
Authority
JP
Japan
Prior art keywords
laser light
light
diffracted
laser
optical
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP2001048359A
Other languages
English (en)
Japanese (ja)
Other versions
JP2002251775A (ja
JP2002251775A5 (enExample
Inventor
秀明 平井
育夫 前田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2001048359A priority Critical patent/JP4634627B2/ja
Publication of JP2002251775A publication Critical patent/JP2002251775A/ja
Publication of JP2002251775A5 publication Critical patent/JP2002251775A5/ja
Application granted granted Critical
Publication of JP4634627B2 publication Critical patent/JP4634627B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Optical Head (AREA)
JP2001048359A 2001-02-23 2001-02-23 光ピックアップ装置 Expired - Fee Related JP4634627B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001048359A JP4634627B2 (ja) 2001-02-23 2001-02-23 光ピックアップ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001048359A JP4634627B2 (ja) 2001-02-23 2001-02-23 光ピックアップ装置

Publications (3)

Publication Number Publication Date
JP2002251775A JP2002251775A (ja) 2002-09-06
JP2002251775A5 JP2002251775A5 (enExample) 2005-09-02
JP4634627B2 true JP4634627B2 (ja) 2011-02-16

Family

ID=18909640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001048359A Expired - Fee Related JP4634627B2 (ja) 2001-02-23 2001-02-23 光ピックアップ装置

Country Status (1)

Country Link
JP (1) JP4634627B2 (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3909025B2 (ja) 2002-03-20 2007-04-25 シャープ株式会社 光ピックアップ装置およびその製造方法

Also Published As

Publication number Publication date
JP2002251775A (ja) 2002-09-06

Similar Documents

Publication Publication Date Title
US5717674A (en) Three-beam generating diffraction grating, transmission type holographic optical element and optical pickup apparatus using the same
US6512608B2 (en) Optical device
US6778475B2 (en) Optical detector, optical pickup and optical information reproducing apparatus using optical pickup for detecting at least three light beams separated from one or more light sources
JPH0758559B2 (ja) 光ピックアップ装置
US5608695A (en) Optical pick-up apparatus with tracking error detection by detection of amount of light in fan field
US5436876A (en) Optical head and optical memory device
US5648946A (en) Optical pick-up apparatus with holographic optical element to diffract both forward and return light beams
CN101086872B (zh) 光拾取器和光盘装置
JP3631446B2 (ja) 光ピックアップ装置
WO2004042714A1 (ja) 光学ヘッドおよび光学ヘッドを備えた光ディスク装置
US6167017A (en) Optical head assembly having means for detecting tracking errors based on astigmatisms generated by returning beams
JP2877044B2 (ja) 光ヘッド装置
JP4634627B2 (ja) 光ピックアップ装置
US7075879B2 (en) Optical pickup device and a method to control an angle between a pit and a major axis of a laser beam
US5691970A (en) Optical pickup for high-density recording/reproducing
JPH0675300B2 (ja) 光学式ヘッド装置
KR100408019B1 (ko) 씨디/디브이디겸용광픽업장치
JPH083908B2 (ja) フォトディテクタの位置合わせ方法および光ピックアップヘッド装置
JP3903001B2 (ja) 光検出器および光学的情報再生装置
JP4216105B2 (ja) 光ディスク装置
JPH1049884A (ja) 光ピックアップ装置
JP3163184B2 (ja) 半導体レーザ装置
JP2000357342A (ja) 光ピックアップ装置
JP2634221B2 (ja) 光記録再生装置
JP2001209964A (ja) 光ヘッド装置

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050225

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050225

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20070209

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070417

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070613

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20071106

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20071226

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20080124

A912 Re-examination (zenchi) completed and case transferred to appeal board

Free format text: JAPANESE INTERMEDIATE CODE: A912

Effective date: 20081003

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100913

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101022

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101119

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131126

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees