JPS61230636A - Optical pickup - Google Patents

Optical pickup

Info

Publication number
JPS61230636A
JPS61230636A JP60072893A JP7289385A JPS61230636A JP S61230636 A JPS61230636 A JP S61230636A JP 60072893 A JP60072893 A JP 60072893A JP 7289385 A JP7289385 A JP 7289385A JP S61230636 A JPS61230636 A JP S61230636A
Authority
JP
Japan
Prior art keywords
splitter
faces
beams
light
prism
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.)
Granted
Application number
JP60072893A
Other languages
Japanese (ja)
Inventor
Naoki Kuwata
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP60072893A priority Critical patent/JPS61230636A/en
Publication of JPS61230636A publication Critical patent/JPS61230636A/en
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To increase a focus draw-in range by unifying a beam splitter, a beam section form converting optical system and a split prism into a body.
CONSTITUTION: A collimator lens 2 which turns the light radiated from a light source 1 into parallel beams is provided together with a converting optical system 15 which changes the section forms of said parallel beams, a beam splitter having faces (h) and (i) through which the light radiated from the system 15 travels straight, a 1/4 wavelength plate 5, an objective lens 7 which stops down the incident light onto a recording medium 9, and a split prism 15 which splits in terms of space the reflected light obtained by giving the change of optical path to the reflected light given from the medium 9 by the beam splitter having faces (i) and (j) into two beams and leads one both split beams to a photodetector 14 for focus and the other beam to a photodetector 13 for tracking respectively. Then the beam splitter having faces (h), (i) and (j), a beam section form converting optical system 3 and the prism 15 are unified into a body.
COPYRIGHT: (C)1986,JPO&Japio
JP60072893A 1985-04-05 1985-04-05 Optical pickup Granted JPS61230636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60072893A JPS61230636A (en) 1985-04-05 1985-04-05 Optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60072893A JPS61230636A (en) 1985-04-05 1985-04-05 Optical pickup

Publications (1)

Publication Number Publication Date
JPS61230636A true JPS61230636A (en) 1986-10-14

Family

ID=13502486

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60072893A Granted JPS61230636A (en) 1985-04-05 1985-04-05 Optical pickup

Country Status (1)

Country Link
JP (1) JPS61230636A (en)

Similar Documents

Publication Publication Date Title
JPS6028044A (en) Optical information reader
JPS5880139A (en) Optical head
JPS61230636A (en) Optical pickup
JPS61214146A (en) Optical head
JPH01253843A (en) Hologram head
JPS58200440A (en) Optical reading device
JPS62200543A (en) Optical pickup
JPS6413246A (en) Optical head for magneto-optical storage
JPS62102433A (en) Optical head
JPS61206947A (en) Pickup for photomagnetic recording and reproducing device of simultaneous erasing and recording type
JPS59144055A (en) Optical head
JPS6050632A (en) Optical head
JPS62248139A (en) Focus detector
JPS6363137A (en) Optical head
JPS61242350A (en) Optical information recording and reproducing device
JPS5856238A (en) Magneto-optical recording and reproducing head
JPS573234A (en) Optical recorder and reproducer
JPS6038738A (en) Optical head
JPS6032132A (en) Optical head device
JPS58146034A (en) Optical system information recording and reading device
JPS59221841A (en) Optical pickup device
JPS57100632A (en) Optical system reproducer
JPS5916149A (en) Tracking method
JPS61233433A (en) Focus detector for optical head
JPH0242644A (en) Optical head structure