JPS5583030A - Photo exchanging device - Google Patents
Photo exchanging deviceInfo
- Publication number
- JPS5583030A JPS5583030A JP15790978A JP15790978A JPS5583030A JP S5583030 A JPS5583030 A JP S5583030A JP 15790978 A JP15790978 A JP 15790978A JP 15790978 A JP15790978 A JP 15790978A JP S5583030 A JPS5583030 A JP S5583030A
- Authority
- JP
- Japan
- Prior art keywords
- diffracted light
- light
- primary diffracted
- intensity modulation
- acousto
- 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
Abstract
PURPOSE: To obtain the exit light having always constant dynamic range by adjusting the ultrasonic power in the acousto-optic element until the detection level of the primary diffracted light in the medium and a set reference value coincide thereby performing light intensity modulation.
CONSTITUTION: When the code signal of a photo exchanging command is entered to an acousto-optic element AO, the zero order diffracted light thereof is applied to the element AO via sensor PS1, code converter 5', VCO6 and the amplitude modulator 12 of a light intensity modulation control system B, the diffraction angle θ of the primary diffracted light whereof is then adjusted and is selectively emitted to arbitrary optical fibers F1 thru F3. In this case, the primary diffracted light is detected through a half mirror HM and sensor PS2 and the detection level V2 thereof is compared with a set reference voltage value VS. The output of the modulator 12 is then increased until V2 and Vs coincide, whereby the light intensity modulation of the element AO is accomplished. As a result of this, the primary diffracted light of the element AO may be maintained at the specified intensity level.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15790978A JPS5583030A (en) | 1978-12-18 | 1978-12-18 | Photo exchanging device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15790978A JPS5583030A (en) | 1978-12-18 | 1978-12-18 | Photo exchanging device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5583030A true JPS5583030A (en) | 1980-06-23 |
Family
ID=15660089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15790978A Pending JPS5583030A (en) | 1978-12-18 | 1978-12-18 | Photo exchanging device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5583030A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5862630A (en) * | 1981-10-08 | 1983-04-14 | Sony Corp | Optical modulating device |
US4938554A (en) * | 1989-04-03 | 1990-07-03 | Unisys Corporation | Temperature compensated fiber optic bypass switch |
JPH03114020A (en) * | 1990-08-15 | 1991-05-15 | Sony Corp | Optical recorder |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50104943A (en) * | 1974-01-22 | 1975-08-19 |
-
1978
- 1978-12-18 JP JP15790978A patent/JPS5583030A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50104943A (en) * | 1974-01-22 | 1975-08-19 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5862630A (en) * | 1981-10-08 | 1983-04-14 | Sony Corp | Optical modulating device |
JPH0463380B2 (en) * | 1981-10-08 | 1992-10-09 | Sony Corp | |
US4938554A (en) * | 1989-04-03 | 1990-07-03 | Unisys Corporation | Temperature compensated fiber optic bypass switch |
JPH03114020A (en) * | 1990-08-15 | 1991-05-15 | Sony Corp | Optical recorder |
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