JPH03106529U - - Google Patents

Info

Publication number
JPH03106529U
JPH03106529U JP1990015110U JP1511090U JPH03106529U JP H03106529 U JPH03106529 U JP H03106529U JP 1990015110 U JP1990015110 U JP 1990015110U JP 1511090 U JP1511090 U JP 1511090U JP H03106529 U JPH03106529 U JP H03106529U
Authority
JP
Japan
Prior art keywords
optical
head section
optical disk
optical head
light beam
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
JP1990015110U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP1990015110U priority Critical patent/JPH03106529U/ja
Priority to DE4104779A priority patent/DE4104779A1/en
Priority to FR9101784A priority patent/FR2659479A1/en
Priority to CA002036412A priority patent/CA2036412A1/en
Publication of JPH03106529U publication Critical patent/JPH03106529U/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1359—Single prisms

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す概略側面図
、第２図は第１図の要部を示す詳細図、第３図は
さらに作用を説明する光路図、第４図は従来の装
置を示す概略側面図、第５図は従来装置の問題点
を説明する詳細図である。 図において、１……光デイスク、２……光デイ
スクの半径方向となる基線、３……固定光学ヘツ
ド部、４……可動光学ヘツド部、４Ａ……反射光
学素子、４０１，４０２……二つの反射面、４ｂ
……対物レンズを示す。なお、図中同一符号は同
一又は相当部分を示す。 Fig. 1 is a schematic side view showing an embodiment of this invention, Fig. 2 is a detailed view showing the main parts of Fig. 1, Fig. 3 is an optical path diagram further explaining the operation, and Fig. 4 is a conventional device. FIG. 5 is a detailed diagram illustrating the problems of the conventional device. In the figure, 1... Optical disk, 2... Base line in the radial direction of the optical disk, 3... Fixed optical head section, 4... Movable optical head section, 4A... Reflective optical element, 401, 402... 2... two reflective surfaces, 4b
...indicates an objective lens. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

【実用新案登録請求の範囲】 レーザ光源と光検出系を有しかつ光デイスクの
半径方向となる基線と平行な光束を発する固定光
学ヘツド部、および前記光束を前記光デイスク面
に対して垂直な光束に変換する反射光学素子と前
記光束を前記光デイスク面上に集束させる対物レ
ンズとを有しかつ前記基線と平行に移動可能な可
動光学ヘツド部を備えた分離型光学ヘツドにおい
て、 前記可動光学ヘツド部に設けられた反射光学素
子を互いに４５°の角度をなす二つの反射面を有
するプリズムとし、この可動光学ヘツド部が前記
光デイスクの半径方向に傾いても前記光デイスク
面に入射する光束は常に垂直に保たれるように構
成したことを特徴とする分離型光学ヘツド。[Claims for Utility Model Registration] A fixed optical head section that includes a laser light source and a photodetection system and emits a light beam parallel to a base line that is the radial direction of the optical disk, and a fixed optical head section that emits a light beam that is perpendicular to the surface of the optical disk. A separate type optical head comprising a reflective optical element for converting into a light beam and an objective lens for focusing the light beam onto the optical disk surface, and a movable optical head section movable in parallel to the base line, comprising: The reflective optical element provided in the head section is a prism having two reflective surfaces forming an angle of 45 degrees to each other, and even if the movable optical head section is tilted in the radial direction of the optical disk, the light flux that is incident on the optical disk surface is A separate optical head characterized in that it is configured so that it is always kept vertical.
JP1990015110U 1990-02-16 1990-02-16 Pending JPH03106529U (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1990015110U JPH03106529U (en) 1990-02-16 1990-02-16
DE4104779A DE4104779A1 (en) 1990-02-16 1991-02-13 Special design optical head assembly - uses internal reflection properties of prism to ensure accurate deflection of light beam
FR9101784A FR2659479A1 (en) 1990-02-16 1991-02-14 OPTICAL RECORDING / REPRODUCING HEAD FOR OPTICAL DISC.
CA002036412A CA2036412A1 (en) 1990-02-16 1991-02-15 Optical head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990015110U JPH03106529U (en) 1990-02-16 1990-02-16

Publications (1)

Publication Number Publication Date
JPH03106529U true JPH03106529U (en) 1991-11-05

Family

ID=11879693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990015110U Pending JPH03106529U (en) 1990-02-16 1990-02-16

Country Status (4)

Country Link
JP (1) JPH03106529U (en)
CA (1) CA2036412A1 (en)
DE (1) DE4104779A1 (en)
FR (1) FR2659479A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5311496A (en) * 1992-11-13 1994-05-10 Hyundai Electronics America Achromatic expansion prism for magneto-optical drive

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015828A (en) * 1983-07-08 1985-01-26 Canon Inc Pickup of optical recording device
JPS60124035A (en) * 1983-12-07 1985-07-02 Canon Inc Optical head device
JPS6448248A (en) * 1987-08-17 1989-02-22 Ricoh Kk Optical pick-up device

Also Published As

Publication number Publication date
FR2659479A1 (en) 1991-09-13
DE4104779A1 (en) 1991-08-29
CA2036412A1 (en) 1991-08-17

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