JPH01112441U - - Google Patents
Info
- Publication number
- JPH01112441U JPH01112441U JP607088U JP607088U JPH01112441U JP H01112441 U JPH01112441 U JP H01112441U JP 607088 U JP607088 U JP 607088U JP 607088 U JP607088 U JP 607088U JP H01112441 U JPH01112441 U JP H01112441U
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- measurement head
- output signal
- correction
- measurement
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
第１図は本考案の光デイスク検査装置の一実施
例を示す構成図、第２図は本考案の光デイスク検
査装置の他の実施例を示す構成図、第３図は従来
の光デイスク検査装置の一例を示す構成図である
。
１……光デイスク、２……スピンドルモータ、
３……測定ヘツド、３１……レーザ光源、３２…
…集光レンズ、３３……ビームスプリツタ、３４
……受光素子、３５……アンプ、４……測定回路
、５……ホールド回路、６……補正演算回路、７
……検出手段、８……切換えスイツチ、９……ス
イツチ、１０……アナログ・デジタル変換器、１
１……信号処理回路、１２……メモリ。
Fig. 1 is a block diagram showing one embodiment of the optical disk inspection device of the present invention, Fig. 2 is a block diagram showing another embodiment of the optical disk inspection device of the present invention, and Fig. 3 is a block diagram showing a conventional optical disk inspection device. FIG. 1 is a configuration diagram showing an example of a device. 1... Optical disk, 2... Spindle motor,
3...Measuring head, 31...Laser light source, 32...
... Condensing lens, 33 ... Beam splitter, 34
... Light receiving element, 35 ... Amplifier, 4 ... Measurement circuit, 5 ... Hold circuit, 6 ... Correction calculation circuit, 7
...detection means, 8 ... changeover switch, 9 ... switch, 10 ... analog-to-digital converter, 1
1...Signal processing circuit, 12...Memory.
Claims (1)
もに反射光の強さに比例した出力信号を発生する
測定ヘツドを有しこの出力信号を利用して光デイ
スクの記録特性に関する各種の測定を行うように
した光デイスク検査装置において、前記測定ヘツ
ドからの出力信号を一時的に記憶するホールド回
路と、このホールド回路に記憶された信号を補正
信号として測定状態における前記測定ヘツドから
の出力信号の大きさを補正する補正演算回路と、
前記測定ヘツドの送り位置あるいは光デイスクの
有無などにより測定ヘツドにおける反射光の受光
状態を検出する検出手段と、この検出手段の出力
に応じて前記測定ヘツドから発生される出力信号
を前記ホールド回路または前記補正演算回路に選
択的に供給する切換えスイツチとを具備してなる
光デイスク検査装置。 It has a measurement head that irradiates the recording surface of an optical disk with a laser beam and generates an output signal proportional to the intensity of the reflected light, and uses this output signal to perform various measurements regarding the recording characteristics of the optical disk. The optical disk inspection apparatus includes a hold circuit that temporarily stores the output signal from the measurement head, and a correction signal that uses the signal stored in the hold circuit to determine the magnitude of the output signal from the measurement head in the measurement state. a correction calculation circuit for correction;
a detection means for detecting the state of reception of reflected light at the measurement head based on the feed position of the measurement head or the presence or absence of an optical disk; An optical disk inspection device comprising a changeover switch for selectively supplying power to the correction calculation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP607088U JPH01112441U (en) | 1988-01-21 | 1988-01-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP607088U JPH01112441U (en) | 1988-01-21 | 1988-01-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01112441U true JPH01112441U (en) | 1989-07-28 |
Family
ID=31209991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP607088U Pending JPH01112441U (en) | 1988-01-21 | 1988-01-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01112441U (en) |
-
1988
- 1988-01-21 JP JP607088U patent/JPH01112441U/ja active Pending
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