JPH0334162U - - Google Patents
Info
- Publication number
- JPH0334162U JPH0334162U JP9474789U JP9474789U JPH0334162U JP H0334162 U JPH0334162 U JP H0334162U JP 9474789 U JP9474789 U JP 9474789U JP 9474789 U JP9474789 U JP 9474789U JP H0334162 U JPH0334162 U JP H0334162U
- Authority
- JP
- Japan
- Prior art keywords
- light
- information medium
- emitting element
- irradiation
- spot
- 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
Description
第１図は本考案の実施例を示す光学読取装置の
断面図、第２図は同じく第１図におけるＡ−Ａ断
面図、第３図ａ，ｂ，ｃは光学読取装置と読取情
報媒体間の距離に対する照射スポツトと検知スポ
ツトとの関係を示す図、第４図は本考案の他の実
施例を示す光学読取装置の断面図、第５図は第４
図におけるＢ−Ｂ断面図、第６図は従来の光学読
取装置の断面図、第７図ａ，ｂ，ｃは光学読取装
置と読取情報媒体間の距離に対するその照射スポ
ツトと検知スポツトとの関係を示す図である。
１２……読取情報媒体、１３……発光素子、１
４……受光素子、１５……照射スポツト、１６…
…検知スポツト、１７……集光レンズ、１８……
反射体、１９……側壁。
Fig. 1 is a sectional view of an optical reading device showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 a, b, and c are views between the optical reading device and the information medium to be read. 4 is a sectional view of an optical reading device showing another embodiment of the present invention, and FIG. 5 is a sectional view of an optical reading device showing another embodiment of the present invention.
6 is a sectional view of a conventional optical reading device, and FIG. 7 a, b, and c are relationships between the irradiation spot and the detection spot with respect to the distance between the optical reading device and the information medium to be read. FIG. 12...Reading information medium, 13...Light emitting element, 1
4... Light receiving element, 15... Irradiation spot, 16...
...Detection spot, 17... Condensing lens, 18...
Reflector, 19...side wall.
Claims (1)
と、読取情報媒体からの反射光を受光する受光素
子と、前記発光素子からの照射光を読取情報媒体
に集光して照射スポツトを形成し読取情報媒体の
検知スポツトからの反射光を受光素子に集光する
集光レンズとを備え、前記発光素子の周囲に、照
射スポツトが検知スポツトよりも大となるようが
形成され、かつ受光素子が発光素子からの照射光
を直接受光するのを防止する反射体が設けられた
ことを特徴とする光学読取装置。 A light-emitting element that emits irradiation light to a reading information medium, a light-receiving element that receives reflected light from the reading information medium, and a light-emitting element that focuses the irradiation light from the light-emitting element onto the reading information medium to form an irradiation spot for reading. and a condensing lens that focuses reflected light from a detection spot on the information medium onto a light receiving element, the irradiation spot is formed around the light emitting element so as to be larger than the detection spot, and the light receiving element emits light. An optical reading device characterized by being provided with a reflector that prevents direct reception of irradiated light from an element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9474789U JPH0334162U (en) | 1989-08-11 | 1989-08-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9474789U JPH0334162U (en) | 1989-08-11 | 1989-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0334162U true JPH0334162U (en) | 1991-04-03 |
Family
ID=31644061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9474789U Pending JPH0334162U (en) | 1989-08-11 | 1989-08-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0334162U (en) |
-
1989
- 1989-08-11 JP JP9474789U patent/JPH0334162U/ja active Pending