JPS56111827A - Synchronizing signal generating method of optical scanner - Google Patents
Synchronizing signal generating method of optical scannerInfo
- Publication number
- JPS56111827A JPS56111827A JP1435480A JP1435480A JPS56111827A JP S56111827 A JPS56111827 A JP S56111827A JP 1435480 A JP1435480 A JP 1435480A JP 1435480 A JP1435480 A JP 1435480A JP S56111827 A JPS56111827 A JP S56111827A
- Authority
- JP
- Japan
- Prior art keywords
- photodetectors
- noises
- irradiated
- mirror
- light
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/047—Detection, control or error compensation of scanning velocity or position
- H04N1/053—Detection, control or error compensation of scanning velocity or position in main scanning direction, e.g. synchronisation of line start or picture elements in a line
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Synchronizing For Television (AREA)
Abstract
PURPOSE:To obtain an accurate synchronizing signal by preventing erroneous operation due to noises, etc., by detecting reflected light from a mirror provided at the end part of a photoreceptor by two photodetectors and then by setting and resetting FF on the basis of the detection outputs. CONSTITUTION:At the scanning-start-side end part of electrophotographic photoreceptor 1, mirror 6 is arranged and with reflected beams from mirror 6, photodetectors 7a and 7b are irradiated continuously. Outputs of photodetectors 7a and 7b are binary-coded through comparators 8a and 8b and then sent to FF9 to set and reset FF. A picture signal, when FF9 is set, is sent to a laser synchronizing with the leading edge of the signal. In this case, if noises appear at elements 7a and 7b and a transmission system for their output signals, FF9 after element 7a is irradiated with the light is held reset until element 7b is irradiated with the light, so that its output Q will not be influenced by the noises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1435480A JPS56111827A (en) | 1980-02-08 | 1980-02-08 | Synchronizing signal generating method of optical scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1435480A JPS56111827A (en) | 1980-02-08 | 1980-02-08 | Synchronizing signal generating method of optical scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56111827A true JPS56111827A (en) | 1981-09-03 |
Family
ID=11858724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1435480A Pending JPS56111827A (en) | 1980-02-08 | 1980-02-08 | Synchronizing signal generating method of optical scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56111827A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986003086A1 (en) * | 1984-11-05 | 1986-05-22 | Eastman Kodak Company | Clock signal producing apparatus |
| JPH02214807A (en) * | 1989-02-16 | 1990-08-27 | Nec Corp | Noise removing circuit for laser scanning light detection signal |
| WO2010058462A1 (en) * | 2008-11-20 | 2010-05-27 | Hoya株式会社 | Scanning type projector |
-
1980
- 1980-02-08 JP JP1435480A patent/JPS56111827A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986003086A1 (en) * | 1984-11-05 | 1986-05-22 | Eastman Kodak Company | Clock signal producing apparatus |
| JPH02214807A (en) * | 1989-02-16 | 1990-08-27 | Nec Corp | Noise removing circuit for laser scanning light detection signal |
| WO2010058462A1 (en) * | 2008-11-20 | 2010-05-27 | Hoya株式会社 | Scanning type projector |
| JP5226081B2 (en) * | 2008-11-20 | 2013-07-03 | プリズム インク | Scanning projector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS54126023A (en) | Optical device | |
| JPS57128810A (en) | Distance measuring device | |
| JPS5576312A (en) | Focus detecting system of image | |
| JPS53110823A (en) | Optical information processor | |
| JPS56111827A (en) | Synchronizing signal generating method of optical scanner | |
| EP0216571A3 (en) | Star scanner | |
| JPS5639555A (en) | Original discrimination method | |
| JPS55106421A (en) | Focusing detector | |
| JPS5797267A (en) | Optical scanning device | |
| JPS57192978A (en) | Toner density detector for copying machine or the like | |
| JPS5574403A (en) | Light position detector | |
| JPS56603A (en) | Position detecting unit | |
| JPS54140558A (en) | Beam position detecting device for recorder | |
| JPS5639518A (en) | Image detecting method | |
| JPS57190246A (en) | Detector for lens defect | |
| JPS57124755A (en) | Failure detector | |
| JPS55528A (en) | Focus detecting method | |
| JPS53148314A (en) | Control method of feeding solid state image sensor | |
| JPS55106431A (en) | Automatic focusing camera | |
| JPS55106419A (en) | Focusing detector | |
| JPS6484119A (en) | Object state detector | |
| JPS56105687A (en) | Compensator for laser output | |
| JPS5511606A (en) | Photoelectric conversion device | |
| JPS5576967A (en) | Range detector | |
| JPS57116310A (en) | Focus detecting system |