JP2000173075A5 - - Google Patents

Download PDF

Info

Publication number
JP2000173075A5
JP2000173075A5 JP1998347700A JP34770098A JP2000173075A5 JP 2000173075 A5 JP2000173075 A5 JP 2000173075A5 JP 1998347700 A JP1998347700 A JP 1998347700A JP 34770098 A JP34770098 A JP 34770098A JP 2000173075 A5 JP2000173075 A5 JP 2000173075A5
Authority
JP
Japan
Prior art keywords
diffraction
diffraction element
light source
grating pattern
light
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.)
Pending
Application number
JP1998347700A
Other languages
English (en)
Japanese (ja)
Other versions
JP2000173075A (ja
Filing date
Publication date
Application filed filed Critical
Priority to JP10347700A priority Critical patent/JP2000173075A/ja
Priority claimed from JP10347700A external-priority patent/JP2000173075A/ja
Priority to CNB991258592A priority patent/CN1167064C/zh
Priority to US09/449,905 priority patent/US6438075B1/en
Publication of JP2000173075A publication Critical patent/JP2000173075A/ja
Publication of JP2000173075A5 publication Critical patent/JP2000173075A5/ja
Pending legal-status Critical Current

Links

JP10347700A 1998-12-03 1998-12-08 光ピックアップ装置および光源ユニット Pending JP2000173075A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10347700A JP2000173075A (ja) 1998-12-08 1998-12-08 光ピックアップ装置および光源ユニット
CNB991258592A CN1167064C (zh) 1998-12-03 1999-11-30 激光头装置及光源单元
US09/449,905 US6438075B1 (en) 1998-12-03 1999-12-02 Light-pick-up device and light source unit incorporated in the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10347700A JP2000173075A (ja) 1998-12-08 1998-12-08 光ピックアップ装置および光源ユニット

Publications (2)

Publication Number Publication Date
JP2000173075A JP2000173075A (ja) 2000-06-23
JP2000173075A5 true JP2000173075A5 (https=) 2004-09-02

Family

ID=18391995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10347700A Pending JP2000173075A (ja) 1998-12-03 1998-12-08 光ピックアップ装置および光源ユニット

Country Status (1)

Country Link
JP (1) JP2000173075A (https=)

Similar Documents

Publication Publication Date Title
US6567355B2 (en) Optical detector, optical pickup and optical information reproducing apparatus using optical pickup
JP2651419B2 (ja) 半導体レーザの光学ヘッド組立体
EP0311463A2 (en) An optical information reproducing apparatus
KR100536361B1 (ko) 광 픽업장치
US5856961A (en) Laser detector grating unit (LDGU) for producing focus error, a push-pull tracking error, and differential phase tracking error signals
JP2000173075A5 (https=)
JP2594445B2 (ja) ホログラム光ヘッド
JP3109877B2 (ja) 光学式情報再生装置
JPH07105059B2 (ja) 光学式ピックアップ装置
JPH0675300B2 (ja) 光学式ヘッド装置
EP0628955B1 (en) Optical head
JPH0963111A (ja) 光ピックアップ装置
JP2001076371A5 (https=)
KR100343159B1 (ko) 광픽업에서회절격자를이용한에러신호검출장치
KR950003175B1 (ko) 광 픽업 장치
JPH02123722U (https=)
KR100224896B1 (ko) 광이용 효율을 높인 광 픽업 장치
JPH04339330A (ja) 光ヘッド
JP2003223736A5 (https=)
JP2552202Y2 (ja) ホログラム光ヘッド
KR200172921Y1 (ko) 홀로그램소자를 채용한 광픽업 장치
JPH05307760A (ja) 光ピックアップ
JP2912305B2 (ja) 光ピックアップ
JPH04372729A (ja) 集積型光学素子および集積型光ピックアップ
JPH0792929B2 (ja) 光学式ピックアップ装置