JPH042322U - - Google Patents
Info
- Publication number
- JPH042322U JPH042322U JP4079390U JP4079390U JPH042322U JP H042322 U JPH042322 U JP H042322U JP 4079390 U JP4079390 U JP 4079390U JP 4079390 U JP4079390 U JP 4079390U JP H042322 U JPH042322 U JP H042322U
- Authority
- JP
- Japan
- Prior art keywords
- reflective surface
- light
- tilt sensor
- lens
- onto
- 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 3
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図ａはこの考案の実施例であるチルトセン
サーを示す断面図、第１図ｂは同チルトセンサー
を示す平面図、第２図は実施例に用いられるフレ
ンネルレンズの変形例を示す断面図、第３図は従
来のチルトセンサーの例を示す正面図、第４図ａ
およびｂは従来のチルトセンサーの他の例を示す
断面図である。
１……発光ダイオード、２……２分割受光素子
、３……フレンネルレンズ、４……遮蔽壁、５…
…ベース、６……ハウジング、７……光デイスク
、８……凸レンズ。
Fig. 1a is a cross-sectional view showing a tilt sensor that is an embodiment of this invention, Fig. 1b is a plan view showing the same tilt sensor, and Fig. 2 is a cross-sectional view showing a modified example of the Fresnel lens used in the embodiment. Figure 3 is a front view showing an example of a conventional tilt sensor, and Figure 4a is a front view showing an example of a conventional tilt sensor.
and b are cross-sectional views showing other examples of conventional tilt sensors. 1... Light emitting diode, 2... 2-split light receiving element, 3... Fresnel lens, 4... Shielding wall, 5...
...Base, 6...Housing, 7...Optical disk, 8...Convex lens.
Claims (1)
集め、この反射面から反射される光を受光素子に
結像するレンズとしてフレンネルレンズを用いた
ことを特徴とする光ピツクアツプのチルトセンサ
ー。 A tilt sensor for an optical pickup characterized by using a Fresnel lens as a lens that collects light emitted from a light source onto a reflective surface of an optical disk and forms an image of the light reflected from this reflective surface onto a light receiving element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4079390U JPH042322U (en) | 1990-04-17 | 1990-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4079390U JPH042322U (en) | 1990-04-17 | 1990-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH042322U true JPH042322U (en) | 1992-01-09 |
Family
ID=31550891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4079390U Pending JPH042322U (en) | 1990-04-17 | 1990-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042322U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6437731A (en) * | 1987-07-31 | 1989-02-08 | Ricoh Kk | Optical information recording and reproducing device |
| JPH0223546A (en) * | 1988-07-12 | 1990-01-25 | Matsushita Electric Ind Co Ltd | Optical head device |
| JPH02192040A (en) * | 1989-01-20 | 1990-07-27 | Ricoh Co Ltd | Optical pickup device |
-
1990
- 1990-04-17 JP JP4079390U patent/JPH042322U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6437731A (en) * | 1987-07-31 | 1989-02-08 | Ricoh Kk | Optical information recording and reproducing device |
| JPH0223546A (en) * | 1988-07-12 | 1990-01-25 | Matsushita Electric Ind Co Ltd | Optical head device |
| JPH02192040A (en) * | 1989-01-20 | 1990-07-27 | Ricoh Co Ltd | Optical pickup device |
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