JPH01176815U - - Google Patents
Info
- Publication number
- JPH01176815U JPH01176815U JP7245788U JP7245788U JPH01176815U JP H01176815 U JPH01176815 U JP H01176815U JP 7245788 U JP7245788 U JP 7245788U JP 7245788 U JP7245788 U JP 7245788U JP H01176815 U JPH01176815 U JP H01176815U
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving surface
- focused
- read
- reading
- 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
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Mechanical Optical Scanning Systems (AREA)
Description
第１図は本考案の一実施例である信号読取装置
の全体構成を示す概側面図、第２図は太陽光が読
取面に入射した状態を示す斜視図、第３図は従来
例を示す概側面図、第４図及び第５図は光の進行
経路を示す説明図である。
１……半導体レーザ、４……ミラー、７……ホ
ログラムデイスク、１０……読取面、１３……受
光面。
Fig. 1 is a schematic side view showing the overall configuration of a signal reading device that is an embodiment of the present invention, Fig. 2 is a perspective view showing a state in which sunlight is incident on the reading surface, and Fig. 3 shows a conventional example. The schematic side view, FIGS. 4 and 5 are explanatory diagrams showing the traveling path of light. 1... Semiconductor laser, 4... Mirror, 7... Hologram disk, 10... Reading surface, 13... Light receiving surface.
Claims (1)
ホログラムデイスクに入射させ、その回折光を読
取面に集光して読取り、この読取られ散乱された
光を前記ホログラムデイスクを介してミラーによ
り反射し、この反射された光を前記読取面と共役
関係にある受光面に集光させることにより前記読
取面の情報を読取る信号読取装置において、前記
受光面に集光される光のスポツト径が最小となる
位置にそのスポツト径と同一面積をもつ前記受光
面を配設したことを特徴とする信号読取装置。 Light emitted from a semiconductor laser is made incident on a hologram disk that rotates at high speed, and its diffracted light is focused on a reading surface and read, and this read and scattered light is reflected by a mirror via the hologram disk. In a signal reading device that reads information on the reading surface by focusing reflected light on a light receiving surface that is in a conjugate relationship with the reading surface, a position where the spot diameter of the light focused on the light receiving surface is minimum. A signal reading device characterized in that the light-receiving surface having the same area as the spot diameter is disposed on the spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7245788U JPH01176815U (en) | 1988-05-31 | 1988-05-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7245788U JPH01176815U (en) | 1988-05-31 | 1988-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01176815U true JPH01176815U (en) | 1989-12-18 |
Family
ID=31297625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7245788U Pending JPH01176815U (en) | 1988-05-31 | 1988-05-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01176815U (en) |
-
1988
- 1988-05-31 JP JP7245788U patent/JPH01176815U/ja active Pending