JPH02144124U - - Google Patents
Info
- Publication number
- JPH02144124U JPH02144124U JP5222789U JP5222789U JPH02144124U JP H02144124 U JPH02144124 U JP H02144124U JP 5222789 U JP5222789 U JP 5222789U JP 5222789 U JP5222789 U JP 5222789U JP H02144124 U JPH02144124 U JP H02144124U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- light
- optical disc
- optical
- amount
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Manufacturing Optical Record Carriers (AREA)
Description
第１図は本考案の一実施例における光デイスク
原盤露光装置の要部を表わした構成説明図、第２
図は異常検出回路における出力変動を表わした線
図、第３図は従来における光デイスク原盤露光装
置の要部を表わした構成説明図である。
１１……ガラス原盤、１２……アクチユエータ
ーユニツト、１３……対物レンズ可動部、１６…
…半導体レーザー光源、１８……検査光、１９…
…光量検出センサー、２１……光電変換回路、２
２……比較回路。
FIG. 1 is a configuration explanatory diagram showing the main parts of an optical disk master exposure device in an embodiment of the present invention, and FIG.
The figure is a diagram showing output fluctuations in the abnormality detection circuit, and FIG. 3 is a configuration explanatory diagram showing the main parts of a conventional optical disk master exposure apparatus. DESCRIPTION OF SYMBOLS 11...Glass master disk, 12...Actuator unit, 13...Objective lens movable part, 16...
...Semiconductor laser light source, 18...Inspection light, 19...
...Light amount detection sensor, 21...Photoelectric conversion circuit, 2
2... Comparison circuit.
Claims (1)
光を照射・露光し、情報の書き込みを行なうよう
にした光デイスクの原盤露光装置において、 上記光デイスク原盤と対物レンズとの間部分で
対物レンズの光軸に直交する光軸を有する検査光
を照射する光源と、 前記対物レンズ側による上記検査光の遮蔽量を
検出するように検査光の光量を検出する光量検出
センサーと、 上記光量検出センサーからの出力を基準値と比
較して光デイスク原盤に対する対物レンズの異常
接近を検出する異常検出回路と、 を備えていることを特徴とする光デイスクの原
盤露光装置。[Scope of Claim for Utility Model Registration] In an optical disc master exposure device that writes information by irradiating and exposing the optical disc master through an objective lens with information light, the space between the optical disc master and the objective lens. a light source that emits inspection light having an optical axis perpendicular to the optical axis of the objective lens at a portion; a light amount detection sensor that detects the amount of the inspection light so as to detect the amount of shielding of the inspection light by the objective lens side; An optical disk master exposure device comprising: an abnormality detection circuit that compares the output from the light amount detection sensor with a reference value to detect abnormal approach of the objective lens to the optical disk master.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5222789U JPH02144124U (en) | 1989-05-02 | 1989-05-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5222789U JPH02144124U (en) | 1989-05-02 | 1989-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02144124U true JPH02144124U (en) | 1990-12-06 |
Family
ID=31572356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5222789U Pending JPH02144124U (en) | 1989-05-02 | 1989-05-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02144124U (en) |
-
1989
- 1989-05-02 JP JP5222789U patent/JPH02144124U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0477118U (en) | ||
| JPH0296618U (en) | ||
| JPH02144124U (en) | ||
| JPS62173650A (en) | Optical information reproducing device | |
| JPH0221618U (en) | ||
| JPS6218831U (en) | ||
| JPH03130018U (en) | ||
| JPS64821U (en) | ||
| JPH0548097Y2 (en) | ||
| JPH01151428U (en) | ||
| JPS58114061U (en) | light beam generator | |
| JPH042317U (en) | ||
| JPS5889853U (en) | Shiba external beam irradiation device | |
| JPS6384934U (en) | ||
| JPS6163390U (en) | ||
| JPS5874108U (en) | Fine pattern measuring device | |
| JPH0197333U (en) | ||
| JPS6222726U (en) | ||
| JPS58138010U (en) | Dimension measuring device | |
| JPH03121525U (en) | ||
| JPS63155055U (en) | ||
| JPH01146207U (en) | ||
| JPS6187342U (en) | ||
| JPH0337610U (en) | ||
| JPH01104507U (en) |