JPH0337554U - - Google Patents
Info
- Publication number
- JPH0337554U JPH0337554U JP9733789U JP9733789U JPH0337554U JP H0337554 U JPH0337554 U JP H0337554U JP 9733789 U JP9733789 U JP 9733789U JP 9733789 U JP9733789 U JP 9733789U JP H0337554 U JPH0337554 U JP H0337554U
- Authority
- JP
- Japan
- Prior art keywords
- barcode
- optical device
- spatial filter
- label
- shape
- 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 10
- 238000003384 imaging method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Description
第１図はこの考案に係るバーコードリーダの光
学装置の要部を示す概略斜視図、第２図はこの考
案に係るバーコードリーダの光学装置における空
間フイルタのスリツト孔の形状を示す平面図、第
３図はこの考案に係るバーコードリーダの光学装
置における空間フイルタ変形例を示す平面図、第
４図は従来のバーコードリーダの光学装置の光路
を示す光路図、第５図は第４図に示す従来のバー
コードリーダの光学装置を示す概略斜視図、第６
図は従来のバーコードリーダの光学装置における
衝立の形状を示す平面図である。
３…（光源）半導体レーザ、１，８…空間フイ
ルタ、５…凹レンズ（結像レンズ）、６…凸レン
ズ（結像レンズ）、２，７…スリツト孔。
FIG. 1 is a schematic perspective view showing the main parts of the optical device of the barcode reader according to this invention, and FIG. 2 is a plan view showing the shape of the slit hole of the spatial filter in the optical device of the barcode reader according to this invention. FIG. 3 is a plan view showing a modified example of the spatial filter in the optical device of the barcode reader according to this invention, FIG. 4 is an optical path diagram showing the optical path of the conventional barcode reader optical device, and FIG. 6 is a schematic perspective view showing the optical device of the conventional barcode reader shown in FIG.
The figure is a plan view showing the shape of a screen in an optical device of a conventional barcode reader. 3... (light source) semiconductor laser, 1, 8... spatial filter, 5... concave lens (imaging lens), 6... convex lens (imaging lens), 2, 7... slit hole.
Claims (1)
状を有するビーム光を、空間フイルタにより絞り
込み所定の結像レンズによりバーコードラベル上
に投光・結像し、そのバーコードラベルに記載し
たバーコードを光学的に読取るバーコードリーダ
の光学装置において、 前記ビーム光の波面長手方向に対しこれに平行
の方向での寸法と、それに直交する方向での寸法
とが異なるような形状に前記空間フイルタのスリ
ツト孔を形成したことを特徴とするバーコードリ
ーダの光学装置。[Claims for Utility Model Registration] A beam of light emitted from a light source and having a shape with a wavefront biased in a specific direction is narrowed down by a spatial filter, projected and imaged onto a barcode label by a predetermined imaging lens, and the barcode label is In an optical device of a barcode reader that optically reads a barcode written on a code label, a dimension in a direction parallel to the longitudinal direction of the wavefront of the beam light is different from a dimension in a direction orthogonal to the longitudinal direction. 1. An optical device for a barcode reader, characterized in that the slit hole of the spatial filter is formed in a shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9733789U JPH0337554U (en) | 1989-08-21 | 1989-08-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9733789U JPH0337554U (en) | 1989-08-21 | 1989-08-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0337554U true JPH0337554U (en) | 1991-04-11 |
Family
ID=31646483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9733789U Pending JPH0337554U (en) | 1989-08-21 | 1989-08-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0337554U (en) |
-
1989
- 1989-08-21 JP JP9733789U patent/JPH0337554U/ja active Pending
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