JPS6412220U - - Google Patents

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Publication number
JPS6412220U
JPS6412220U JP10535087U JP10535087U JPS6412220U JP S6412220 U JPS6412220 U JP S6412220U JP 10535087 U JP10535087 U JP 10535087U JP 10535087 U JP10535087 U JP 10535087U JP S6412220 U JPS6412220 U JP S6412220U
Authority
JP
Japan
Prior art keywords
photodetector
light receiving
showing
view
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
JP10535087U
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 JP10535087U priority Critical patent/JPS6412220U/ja
Publication of JPS6412220U publication Critical patent/JPS6412220U/ja
Pending legal-status Critical Current

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Description

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

第1図は本考案の一実施例における光検出器の
構成を示す概略斜視図であり、第2図は上記光検
出器が適用される光学ピツクアツプ装置の構成を
説明する模式図であり、第3図は上記光検出器を
光学ピツクアツプ装置のフオーカスエラー信号検
出手段に適用した場合の全受光面上における光ビ
ームの位置を示す模式図であり、第4図は上記光
検出器を第3図に示したと同様に適用した場合の
光デイスクが傾いた場合の全受光面上における光
ビームの位置を示す模式図である。第5図は本考
案の他の実施例における光検出器の構成を示す概
略斜視図である。第6図は本考案のさらに他の実
施例における光検出器の構成を示す概略斜視図で
ある。第7図は従来の光検出器を用いて構成され
た光学ピツクアツプ装置におけるフオーカスエラ
ー検出手段の構成を示す模式的斜視図であり、第
8図は従来の光検出器の構成を示す概略斜視図で
あり、第9図及び第10図は光学ピツクアツプ装
置におけるフオーカスエラー検出手段に適用され
た従来の光検出器の全受光面上におけるフオーカ
スエラーが発生している場合の光ビームの形状を
示す模式的平面図であり、第11図は光学ピツク
アツプ装置において対物レンズに対して光デイス
ク面が傾いた場合の戻り光ビームの移動を説明す
る模式図であり、第12図は第9図及び第10図
に示したと同様に適用された従来の光検出器の全
受光面上におけるフオーカスエラーがない場合の
光ビームの形状を示す模式的平面図であり、第1
3図は第12図に示したと同様に適用された従来
の光検出器の全受光面上におけるフオーカスエラ
ーがなく光デイスクが傾いた場合の光ビームの状
態を示す模式的平面図であり、第14図は光学ピ
ツクアツプ装置における戻り光ビームの光エネル
ギーの分布を説明する模式図である。 1a,1b,1c,1d……第1乃至第4の受
光素子、2……基台、3a,3b,3c,3d…
…第1乃至第4の受光面、4……段差部。
FIG. 1 is a schematic perspective view showing the configuration of a photodetector in an embodiment of the present invention, and FIG. 2 is a schematic diagram illustrating the configuration of an optical pickup device to which the photodetector is applied. FIG. 3 is a schematic diagram showing the position of the light beam on the entire light receiving surface when the above photodetector is applied to the focus error signal detection means of an optical pickup device, and FIG. 4 is a schematic diagram showing the position of the light beam on the entire light receiving surface. FIG. 6 is a schematic diagram showing the position of the light beam on the entire light receiving surface when the optical disk is tilted when applied in the same manner as shown in the figure. FIG. 5 is a schematic perspective view showing the configuration of a photodetector in another embodiment of the present invention. FIG. 6 is a schematic perspective view showing the configuration of a photodetector in still another embodiment of the present invention. FIG. 7 is a schematic perspective view showing the configuration of a focus error detection means in an optical pickup device configured using a conventional photodetector, and FIG. 8 is a schematic perspective view showing the configuration of a conventional photodetector. 9 and 10 show the shape of a light beam when a focus error occurs on the entire light receiving surface of a conventional photodetector applied to a focus error detection means in an optical pickup device. FIG. 11 is a schematic plan view illustrating the movement of the returned light beam when the optical disk surface is tilted with respect to the objective lens in an optical pickup device, and FIG. 10 is a schematic plan view showing the shape of a light beam when there is no focus error on the entire light-receiving surface of a conventional photodetector applied in the same manner as shown in FIG.
FIG. 3 is a schematic plan view showing the state of the light beam when there is no focus error on the entire light-receiving surface of a conventional photodetector applied in the same manner as shown in FIG. 12 and the optical disk is tilted. FIG. 14 is a schematic diagram illustrating the distribution of optical energy of the returned light beam in the optical pickup device. 1a, 1b, 1c, 1d...first to fourth light receiving elements, 2...base, 3a, 3b, 3c, 3d...
...First to fourth light-receiving surfaces, 4... Step portion.

Claims (1)

【実用新案登録請求の範囲】 複数の受光素子を備えてなる光記録媒体再生装
置の光検出器において、 上記複数の受光素子の各受光面は、互いに平行
であつて、且つ、隣接する受光素子の受光面に対
して段差を有してなる光検出器。
[Claims for Utility Model Registration] In a photodetector for an optical recording medium reproducing device comprising a plurality of light receiving elements, each of the light receiving surfaces of the plurality of light receiving elements is parallel to each other, and adjacent light receiving elements A photodetector having a step with respect to a light-receiving surface.
JP10535087U 1987-07-10 1987-07-10 Pending JPS6412220U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10535087U JPS6412220U (en) 1987-07-10 1987-07-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10535087U JPS6412220U (en) 1987-07-10 1987-07-10

Publications (1)

Publication Number Publication Date
JPS6412220U true JPS6412220U (en) 1989-01-23

Family

ID=31337886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10535087U Pending JPS6412220U (en) 1987-07-10 1987-07-10

Country Status (1)

Country Link
JP (1) JPS6412220U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5274218A (en) * 1975-12-17 1977-06-22 Mansei Kogyo Kk Device for controlling focal point of optical information reader
JPS6192445A (en) * 1985-10-04 1986-05-10 Matsushita Electric Ind Co Ltd Photodetector for optical disc device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5274218A (en) * 1975-12-17 1977-06-22 Mansei Kogyo Kk Device for controlling focal point of optical information reader
JPS6192445A (en) * 1985-10-04 1986-05-10 Matsushita Electric Ind Co Ltd Photodetector for optical disc device

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