JPS55166773A - Optical reader - Google Patents
Optical readerInfo
- Publication number
- JPS55166773A JPS55166773A JP7530079A JP7530079A JPS55166773A JP S55166773 A JPS55166773 A JP S55166773A JP 7530079 A JP7530079 A JP 7530079A JP 7530079 A JP7530079 A JP 7530079A JP S55166773 A JPS55166773 A JP S55166773A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- detecting
- rotary mirror
- accurately
- 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
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Character Input (AREA)
Abstract
PURPOSE:To keep the quantity of light from a light source constant at any time by accurately detecting the quantity of the light by exercising control over the quantity of the light while detecting the quantity of the light from the light source, by detecting the quantity of reflected light from a rotary mirror directly in an optical reader which reads core information. CONSTITUTION:Light from light source 1 reaches code information appended to article 7 placed on scanning window 6 by way of reflecting plate 2, rotary mirror 4, and fixed mirrors 5a-5n arranged on a semicircle track centering on rotary mirror 4, and the information is read. Light-quantity detecting method 12, arranged among fixed mirrors 5a-5n, detects the quantity of light arriving via rotary mirror 4 and its detection signal is input to light-quantity control method 14 via sample holding and feedback circuit 13 to control the quantity of the light of light source 1. Consequently, the quantity of the light can accurately be detected without any loss of the arrival light and the quantity of the light of the light source can be kept constant at any time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7530079A JPS55166773A (en) | 1979-06-14 | 1979-06-14 | Optical reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7530079A JPS55166773A (en) | 1979-06-14 | 1979-06-14 | Optical reader |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55166773A true JPS55166773A (en) | 1980-12-26 |
Family
ID=13572250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7530079A Pending JPS55166773A (en) | 1979-06-14 | 1979-06-14 | Optical reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55166773A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5870377A (en) * | 1981-10-21 | 1983-04-26 | Sumitomo Electric Ind Ltd | Light quantity controlling system of optical character reader |
-
1979
- 1979-06-14 JP JP7530079A patent/JPS55166773A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5870377A (en) * | 1981-10-21 | 1983-04-26 | Sumitomo Electric Ind Ltd | Light quantity controlling system of optical character reader |
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