JPH01107018U - - Google Patents
Info
- Publication number
- JPH01107018U JPH01107018U JP191388U JP191388U JPH01107018U JP H01107018 U JPH01107018 U JP H01107018U JP 191388 U JP191388 U JP 191388U JP 191388 U JP191388 U JP 191388U JP H01107018 U JPH01107018 U JP H01107018U
- Authority
- JP
- Japan
- Prior art keywords
- prism
- degrees
- reflective
- optical path
- optical
- 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
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 6
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Optical Head (AREA)
Description
第１図は本考案の一実施例を示す要部の斜視図
、第２図は要部の平面図、第３図は角度誤差測定
器の視野図、第４図は従来の一例を示す平面図、
第５図はその側面図である。
１…発光部、４…受光部、７…透過プリズム、
８…反射プリズム、９…プリズム、１０…境界面
、１１…反射面、１２…対物レンズ、１７…レー
ザビーム、２２…反射膜、２３…面。
Fig. 1 is a perspective view of the main part showing an embodiment of the present invention, Fig. 2 is a plan view of the main part, Fig. 3 is a field view of the angular error measuring device, and Fig. 4 is a plan view showing an example of the conventional method. figure,
FIG. 5 is a side view thereof. 1... Light emitting section, 4... Light receiving section, 7... Transmission prism,
8... Reflection prism, 9... Prism, 10... Boundary surface, 11... Reflection surface, 12... Objective lens, 17... Laser beam, 22... Reflection film, 23... Surface.
Claims (1)
して４５度の角度で交わる境界面を持つ透過プリ
ズムと前記光軸に対して４５度の角度で交わり前
記境界面に対して前記光軸を軸に９０度ねじれた
配置となる反射面を持つ反射プリズムとが一体に
結合されたプリズムを有し、このプリズムの前記
反射面により９０度曲折した光路上に対物レンズ
が配され、前記境界面により９０度曲折した光路
上に受光部が設けられた光学ヘツドにおいて、前
記受光部を含む前記光軸に直交し光路に不要な面
に反射膜を形成したことを特徴とする光学ヘツド
。 a transmission prism having a boundary surface that intersects at an angle of 45 degrees with the optical axis of the laser beam emitted from the light emitting part; A reflective prism having a reflective surface twisted by 90 degrees is integrated into the prism, and an objective lens is disposed on an optical path bent by 90 degrees by the reflective surface of this prism, and the boundary surface 1. An optical head having a light receiving section provided on an optical path bent at 90 degrees, characterized in that a reflective film is formed on a surface that is perpendicular to the optical axis including the light receiving section and is unnecessary to the optical path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP191388U JPH01107018U (en) | 1988-01-11 | 1988-01-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP191388U JPH01107018U (en) | 1988-01-11 | 1988-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01107018U true JPH01107018U (en) | 1989-07-19 |
Family
ID=31202215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP191388U Pending JPH01107018U (en) | 1988-01-11 | 1988-01-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01107018U (en) |
-
1988
- 1988-01-11 JP JP191388U patent/JPH01107018U/ja active Pending
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