JPH0223762U - - Google Patents
Info
- Publication number
- JPH0223762U JPH0223762U JP9835988U JP9835988U JPH0223762U JP H0223762 U JPH0223762 U JP H0223762U JP 9835988 U JP9835988 U JP 9835988U JP 9835988 U JP9835988 U JP 9835988U JP H0223762 U JPH0223762 U JP H0223762U
- Authority
- JP
- Japan
- Prior art keywords
- light
- hologram
- reading device
- incident
- hologram disk
- 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
- 230000004907 flux Effects 0.000 claims description 2
- 230000001427 coherent effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は、本考案の一実施例の構成図、第２図
は、同実施例の絞り装置の詳細図、第３図は、ホ
ログラムデイスクへ入射する光束径とバーコード
ラベル上を走査する光束径の関係を示す図、第４
図は、ボイド及びスポツトがあるバーコードを高
分解能と低分解能で読み取る場合の読取情報の比
較図である。
１…レーザ光源、２…ホログラムデイスク、３
…絞り装置、４…アクチユエータ、６…読取窓領
域、８…光検知素子。
Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a detailed view of the aperture device of the same embodiment, and Fig. 3 shows the diameter of the light beam incident on the hologram disk and the scanning on the barcode label. Diagram showing the relationship between luminous flux diameter, 4th
The figure is a comparison diagram of read information when barcodes with voids and spots are read with high resolution and low resolution. 1... Laser light source, 2... Hologram disk, 3
...Aperture device, 4...Actuator, 6...Reading window area, 8...Photodetection element.
Claims (1)
射し、ホログラムにより回折された光をバーコー
ドラベル上に収束、走査させてその反射光を光検
知素子で検知するバーコード読取装置において、
前記ホログラムデイスクに入射する光束の径を調
節する手段を設けたことを特徴とするバーコード
読取装置。 In a barcode reading device, a coherent light flux is incident on a hologram disk, the light diffracted by the hologram is focused and scanned on a barcode label, and the reflected light is detected by a photodetector element.
A barcode reading device comprising means for adjusting the diameter of a beam of light incident on the hologram disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9835988U JPH0223762U (en) | 1988-07-27 | 1988-07-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9835988U JPH0223762U (en) | 1988-07-27 | 1988-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0223762U true JPH0223762U (en) | 1990-02-16 |
Family
ID=31324552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9835988U Pending JPH0223762U (en) | 1988-07-27 | 1988-07-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0223762U (en) |
-
1988
- 1988-07-27 JP JP9835988U patent/JPH0223762U/ja active Pending
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