GB1008200A - A scanning device for scanning binary coded scales - Google Patents
A scanning device for scanning binary coded scalesInfo
- Publication number
- GB1008200A GB1008200A GB23109/62A GB2310962A GB1008200A GB 1008200 A GB1008200 A GB 1008200A GB 23109/62 A GB23109/62 A GB 23109/62A GB 2310962 A GB2310962 A GB 2310962A GB 1008200 A GB1008200 A GB 1008200A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photodiode
- scanning
- photodiodes
- binary coded
- negative
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1009—Calibration
Abstract
1,008,200. Selective " signalling " systems. LICENTIA PATENT - VERWALTUNGSG.m.b.H. June 15, 1962 [June 16, 1961], No. 23109/62. Heading G4H. In a shaft-position encoder, the least significant track of a binary coded scale is sensed by a photodiode 0<SP>1</SP>, Fig. 4, and the remaining tracks are sensed by lead and lag photodiodes 1a, 1b to 3a, 3b. Complementary signals A 0 , A 0 are obtained from photodiode 0<SP>1</SP> by means of a bi-stable circuit FF. The output from photodiodes 1a, 1b is controlled by the signals A 0 , #A 0 by means of the circuit shown in Fig. 3. One or other of photodiodes 1a 1b must be illuminated and the associated transistor 1 or 2 must be cut off. The application of a negative A 0 or #A 0 signal to the resistor 5 or 6 associated with the illuminated photodiode has no effect and a negative potential appears at A 1 ,_the complementary signal being supplied at A, by inverter N 1 . If the negative A 0 or A 0 signal is applied to the resistor 5 or 6 associated with the non- illuminated photodiode 1a or 1b the associated transistor 1 or 2 conducts and negative potential appears on A 1 .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL39285A DE1224777B (en) | 1961-06-16 | 1961-06-16 | Control device for code raster tracks in double or V-reading scanning signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1008200A true GB1008200A (en) | 1965-10-27 |
Family
ID=7268596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23109/62A Expired GB1008200A (en) | 1961-06-16 | 1962-06-15 | A scanning device for scanning binary coded scales |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH393759A (en) |
| DE (1) | DE1224777B (en) |
| GB (1) | GB1008200A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286666A (en) * | 1994-02-11 | 1995-08-23 | Stewart Hughes Ltd | An optical tracker system |
-
1961
- 1961-06-16 DE DEL39285A patent/DE1224777B/en active Pending
-
1962
- 1962-06-05 CH CH684962A patent/CH393759A/en unknown
- 1962-06-15 GB GB23109/62A patent/GB1008200A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286666A (en) * | 1994-02-11 | 1995-08-23 | Stewart Hughes Ltd | An optical tracker system |
| US5929431A (en) * | 1994-02-11 | 1999-07-27 | Stewart Hughes Limited | Optical tracker system for determining the position of a rotating body |
Also Published As
| Publication number | Publication date |
|---|---|
| CH393759A (en) | 1965-06-15 |
| DE1224777B (en) | 1966-09-15 |
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