JPS63832A - Optical recording and reproducing device - Google Patents

Optical recording and reproducing device

Info

Publication number
JPS63832A
JPS63832A JP61142754A JP14275486A JPS63832A JP S63832 A JPS63832 A JP S63832A JP 61142754 A JP61142754 A JP 61142754A JP 14275486 A JP14275486 A JP 14275486A JP S63832 A JPS63832 A JP S63832A
Authority
JP
Japan
Prior art keywords
light flux
plane
reflected
changed
splitter
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
JP61142754A
Other languages
Japanese (ja)
Inventor
Michihiro Tadokoro
Hitoshi Imai
Ryuichiro Arai
Kimiyuki Koyanagi
Kazuo Okada
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP61142754A priority Critical patent/JPS63832A/en
Publication of JPS63832A publication Critical patent/JPS63832A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent unnecessary light flux from being returned to a light source, by inclining a plane not used as the incident plane, or the emitting plane of almost a rectangular parallelopiped polarizing beam splitter, or a half prism.
CONSTITUTION: A plane 12b not used as the incident plane, or the emitting plane of almost a rectangular parallelopiped polarizing beam splitter 12, is inclined and formed against incident light flux 4a. The light flux 4a is changed to light flux 4c through the splitter 12, and a 1/4 wavelength plate 11, and is condensed on an information carrier. At this time, a part of the light flux 4a is changed to unnecessary light flux 18a being reflected on the reflecting plane 12a of the splitter 12, and is reflected on the plane 12b, then being changed to light flux 18b, however, even when the light flux 18b is reflected on the plane 12a, its optical axis does not coincide with that of the light flux 4a. Therefore, it is possible to suppress interference noise due to the return of the unnecessary light flux to the light source, and the overlapping of an interference wave on a reproducing signal. Also, the same result can be obtained in case of using the half prism.
COPYRIGHT: (C)1988,JPO&Japio
JP61142754A 1986-06-20 1986-06-20 Optical recording and reproducing device Pending JPS63832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61142754A JPS63832A (en) 1986-06-20 1986-06-20 Optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61142754A JPS63832A (en) 1986-06-20 1986-06-20 Optical recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS63832A true JPS63832A (en) 1988-01-05

Family

ID=15322799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61142754A Pending JPS63832A (en) 1986-06-20 1986-06-20 Optical recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS63832A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0294035A (en) * 1988-09-30 1990-04-04 Canon Inc Optical head
JPH04205929A (en) * 1990-11-30 1992-07-28 Nec Corp Prism and optical head for optical disk device using the prism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0294035A (en) * 1988-09-30 1990-04-04 Canon Inc Optical head
JP2728211B2 (en) * 1988-09-30 1998-03-18 キヤノン株式会社 Light head
JPH04205929A (en) * 1990-11-30 1992-07-28 Nec Corp Prism and optical head for optical disk device using the prism

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