JPS6424529A - Spatial optical transmitter - Google Patents
Spatial optical transmitterInfo
- Publication number
- JPS6424529A JPS6424529A JP62180561A JP18056187A JPS6424529A JP S6424529 A JPS6424529 A JP S6424529A JP 62180561 A JP62180561 A JP 62180561A JP 18056187 A JP18056187 A JP 18056187A JP S6424529 A JPS6424529 A JP S6424529A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- light
- projectors
- communication area
- moving
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title 1
- 239000000969 carrier Substances 0.000 abstract 1
- 239000000284 extract Substances 0.000 abstract 1
Abstract
PURPOSE:To make a two-way communication in a wide communication area without any trouble by sending a pulse data signal which is generated by imposing pulse modulation on a carrier of specific frequency with data pulses to plural fixed light projectors and extracting it by a moving signal receiver which moves in the communication area. CONSTITUTION:The pulse data signal generated by imposing pulse modulation on the carrier of specific frequency with the data pulses is sent out of a fixed signal output part 14 to plural fixed light projectors 23, which project pulse light in the entire communication area. The moving photodetector 40 on a moving body 50 which moves in the communication area photodetects the pulse light and a moving signal reception part extracts the pulse data signal from the pulse light. Thus, the plural projectors 23 are arranged so as to project the pulse light over the entire communication area and the same carriers and in-phase pulse data signals are sent out of the fixed signal output part 14 to the respective projectors 23. Consequently, the moving signal reception part can receives the excellent pulse data even in an area where light beams projected by fixed projectors overlap with each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62180561A JPS6424529A (en) | 1987-07-20 | 1987-07-20 | Spatial optical transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62180561A JPS6424529A (en) | 1987-07-20 | 1987-07-20 | Spatial optical transmitter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6424529A true JPS6424529A (en) | 1989-01-26 |
JPH0434338B2 JPH0434338B2 (en) | 1992-06-05 |
Family
ID=16085432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62180561A Granted JPS6424529A (en) | 1987-07-20 | 1987-07-20 | Spatial optical transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6424529A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0719218U (en) * | 1993-09-06 | 1995-04-07 | 村田機械株式会社 | Stacker crane communication device |
WO1996024990A1 (en) * | 1995-02-08 | 1996-08-15 | Lee Communications Limited | Fixed station to vehicle optical communications system |
WO2001045981A3 (en) * | 1999-12-22 | 2002-06-13 | Quantumbeam Ltd | Optical free space signalling system |
KR100622800B1 (en) * | 2003-03-28 | 2006-09-14 | 인터내셔널 비지네스 머신즈 코포레이션 | Single request data transfer regardless of size and alignment |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60259028A (en) * | 1984-06-05 | 1985-12-21 | Toshiba Corp | Optical communication system for self-running track |
JPS619044A (en) * | 1984-06-25 | 1986-01-16 | Toshiba Corp | Opticl transmission system |
JPS62120151A (en) * | 1985-11-20 | 1987-06-01 | Canon Inc | Cordless optical telephone system |
-
1987
- 1987-07-20 JP JP62180561A patent/JPS6424529A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60259028A (en) * | 1984-06-05 | 1985-12-21 | Toshiba Corp | Optical communication system for self-running track |
JPS619044A (en) * | 1984-06-25 | 1986-01-16 | Toshiba Corp | Opticl transmission system |
JPS62120151A (en) * | 1985-11-20 | 1987-06-01 | Canon Inc | Cordless optical telephone system |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0719218U (en) * | 1993-09-06 | 1995-04-07 | 村田機械株式会社 | Stacker crane communication device |
WO1996024990A1 (en) * | 1995-02-08 | 1996-08-15 | Lee Communications Limited | Fixed station to vehicle optical communications system |
WO2001045981A3 (en) * | 1999-12-22 | 2002-06-13 | Quantumbeam Ltd | Optical free space signalling system |
KR100622800B1 (en) * | 2003-03-28 | 2006-09-14 | 인터내셔널 비지네스 머신즈 코포레이션 | Single request data transfer regardless of size and alignment |
Also Published As
Publication number | Publication date |
---|---|
JPH0434338B2 (en) | 1992-06-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |