JPH01138220U - - Google Patents
Info
- Publication number
- JPH01138220U JPH01138220U JP3351188U JP3351188U JPH01138220U JP H01138220 U JPH01138220 U JP H01138220U JP 3351188 U JP3351188 U JP 3351188U JP 3351188 U JP3351188 U JP 3351188U JP H01138220 U JPH01138220 U JP H01138220U
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- optical recording
- respect
- beam spot
- intersection
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 2
- 238000002834 transmittance Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Optical Head (AREA)
Description
第１図は本考案の光記録媒体としての原盤の一
実施例を示す平面図、第２図は本考案の光記録装
置の一実施例を示す光学系の模式図と検出系の系
統図、第３図は本考案のナイフエツジ法の動作説
明図、第４図は本考案のビームスポツト強度分布
曲線図、第５図はナイフエツジ法を説明する模式
図、第６図はナイフエツジ法のビームスポツト透
過出力曲線図と強度分布曲線図、第７図は従来の
光記録装置の概念図、第８図は従来のビームスポ
ツトをモニタする方法を説明する光学系の概念図
である。
１はレーザ光源、２は光変調器、３は対物レン
ズ、４は原盤、１８，１８ａ，１８ｂは光検出器
、１９ａ，１９ｂは光学フイルタである。
FIG. 1 is a plan view showing an embodiment of a master disc as an optical recording medium of the present invention; FIG. 2 is a schematic diagram of an optical system and a system diagram of a detection system showing an embodiment of an optical recording device of the present invention; Fig. 3 is a diagram explaining the operation of the knife edge method of the present invention, Fig. 4 is a beam spot intensity distribution curve diagram of the present invention, Fig. 5 is a schematic diagram explaining the knife edge method, and Fig. 6 is a beam spot transmission diagram of the knife edge method. An output curve diagram and an intensity distribution curve diagram, FIG. 7 is a conceptual diagram of a conventional optical recording device, and FIG. 8 is a conceptual diagram of an optical system for explaining a conventional method of monitoring a beam spot. 1 is a laser light source, 2 is an optical modulator, 3 is an objective lens, 4 is a master disc, 18, 18a, 18b are photodetectors, and 19a, 19b are optical filters.
Claims (1)
ポツトに対し、透過率の異なる交差部分を光記録
媒体の外周接線方向に対して略４５度の相反する
角度に設けて成ることを特徴とする光記録媒体。 ２ 円盤状の記録媒体面に照射されるビームスポ
ツトに対し、透過率の異なる交差部分を光記録媒
体の外周接線方向に対して略４５度の相反する角
度に設けた光記録媒体と、 該光記録媒体の交差部分を透過又は反射した光
量を検出する検出手段と、 該検出手段の検出出力を計測す計測手段とを有
し、 上記光記録媒体面に集束されたビームスポツト
の光強度分布を上記計測手段により２次元方向で
計測する様に成したことを特徴とする光記録装置
。[Claims for Utility Model Registration] 1. With respect to the beam spot irradiated onto the surface of a disk-shaped optical recording medium, the intersection parts with different transmittances are set at opposite angles of approximately 45 degrees with respect to the tangential direction of the outer circumference of the optical recording medium. An optical recording medium characterized by comprising: 2. An optical recording medium in which intersection parts with different transmittances are provided at opposite angles of approximately 45 degrees with respect to the tangential direction of the outer circumference of the optical recording medium with respect to the beam spot irradiated onto the surface of the disc-shaped recording medium; It has a detection means for detecting the amount of light transmitted or reflected by the intersection of the recording medium, and a measurement means for measuring the detection output of the detection means, and measures the light intensity distribution of the beam spot focused on the surface of the optical recording medium. An optical recording device characterized in that the measurement means is configured to measure in a two-dimensional direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3351188U JP2506910Y2 (en) | 1988-03-14 | 1988-03-14 | Optical recording medium and optical recording apparatus for performing optical recording on the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3351188U JP2506910Y2 (en) | 1988-03-14 | 1988-03-14 | Optical recording medium and optical recording apparatus for performing optical recording on the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01138220U true JPH01138220U (en) | 1989-09-21 |
| JP2506910Y2 JP2506910Y2 (en) | 1996-08-14 |
Family
ID=31260195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3351188U Expired - Lifetime JP2506910Y2 (en) | 1988-03-14 | 1988-03-14 | Optical recording medium and optical recording apparatus for performing optical recording on the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2506910Y2 (en) |
-
1988
- 1988-03-14 JP JP3351188U patent/JP2506910Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2506910Y2 (en) | 1996-08-14 |
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