JPS628848B2 - - Google Patents

Info

Publication number
JPS628848B2
JPS628848B2 JP8800078A JP8800078A JPS628848B2 JP S628848 B2 JPS628848 B2 JP S628848B2 JP 8800078 A JP8800078 A JP 8800078A JP 8800078 A JP8800078 A JP 8800078A JP S628848 B2 JPS628848 B2 JP S628848B2
Authority
JP
Japan
Prior art keywords
signal
focus
output
level
focus lens
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
Application number
JP8800078A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5567945A (en
Inventor
Toshihiko Hosaka
Hiroaki Tsuboi
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.)
PAIONIA BIDEO KK
PAIONIA KK
Original Assignee
PAIONIA BIDEO KK
PAIONIA KK
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 PAIONIA BIDEO KK, PAIONIA KK filed Critical PAIONIA BIDEO KK
Priority to JP8800078A priority Critical patent/JPS5567945A/ja
Priority to GB7924345A priority patent/GB2027881B/en
Priority to DE19792929049 priority patent/DE2929049A1/de
Priority to US06/058,647 priority patent/US4286147A/en
Publication of JPS5567945A publication Critical patent/JPS5567945A/ja
Publication of JPS628848B2 publication Critical patent/JPS628848B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Control Of Position Or Direction (AREA)
JP8800078A 1978-07-19 1978-07-19 In-focus detector Granted JPS5567945A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8800078A JPS5567945A (en) 1978-07-19 1978-07-19 In-focus detector
GB7924345A GB2027881B (en) 1978-07-19 1979-07-12 In-focus detecting device
DE19792929049 DE2929049A1 (de) 1978-07-19 1979-07-18 Einrichtung zum feststellen der scharfeinstellung
US06/058,647 US4286147A (en) 1978-07-19 1979-07-19 In-focus detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8800078A JPS5567945A (en) 1978-07-19 1978-07-19 In-focus detector

Publications (2)

Publication Number Publication Date
JPS5567945A JPS5567945A (en) 1980-05-22
JPS628848B2 true JPS628848B2 (cs) 1987-02-25

Family

ID=13930509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8800078A Granted JPS5567945A (en) 1978-07-19 1978-07-19 In-focus detector

Country Status (1)

Country Link
JP (1) JPS5567945A (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS586531A (ja) * 1981-07-01 1983-01-14 Teac Co 記録又は再生装置

Also Published As

Publication number Publication date
JPS5567945A (en) 1980-05-22

Similar Documents

Publication Publication Date Title
JPS6331217Y2 (cs)
JPS58143472A (ja) 記録情報再生装置のトラツキングサ−ボ制御装置
US4286147A (en) In-focus detecting device
JPS628848B2 (cs)
JPS6313261B2 (cs)
JPS6227454B2 (cs)
JP2611536B2 (ja) 光ディスク装置のフォーカスサーチ方式及び光ディスク装置
JPH0440783B2 (cs)
JPH071549B2 (ja) フオ−カスサ−チ回路
KR870000697Y1 (ko) 광 재생 장치의 포커스 서보회로
JPH0433545Y2 (cs)
JPH0341287Y2 (cs)
KR890003586Y1 (ko) 촛점 입력구동신호 발생기
KR100594809B1 (ko) 포커스 인입 장치 및 방법
JPH077512B2 (ja) フォーカスサーボ装置
JPS6232354Y2 (cs)
JPH05159327A (ja) 光学式ディスクプレーヤにおけるフォーカスサーチ回路
JP3462890B2 (ja) フォーカスサーボ引き込み回路及び方法
JPH0520815B2 (cs)
JPS6218972B2 (cs)
JPS63100621A (ja) 光デイスク再生装置のフオ−カスサ−ボ回路
JPH04177618A (ja) 光ディスク装置のフォーカスサーチ回路
JPS59149229U (ja) フオ−カスサ−ボ回路
JPH0785490A (ja) 光ディスクプレーヤーのサーボ補償回路
JPS60136038A (ja) 光情報読取装置用フオ−カスレンズの制御装置