FR2259376A1 - Laser sound detector system with source generating light beam - has reflecting means at distance from source - Google Patents
Laser sound detector system with source generating light beam - has reflecting means at distance from sourceInfo
- Publication number
- FR2259376A1 FR2259376A1 FR7502966A FR7502966A FR2259376A1 FR 2259376 A1 FR2259376 A1 FR 2259376A1 FR 7502966 A FR7502966 A FR 7502966A FR 7502966 A FR7502966 A FR 7502966A FR 2259376 A1 FR2259376 A1 FR 2259376A1
- Authority
- FR
- France
- Prior art keywords
- source
- light beam
- light
- distance
- sound
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2/00—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Optical Communication System (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US43850074A | 1974-01-30 | 1974-01-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2259376A1 true FR2259376A1 (en) | 1975-08-22 |
FR2259376B3 FR2259376B3 (fr) | 1977-10-21 |
Family
ID=23740882
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7502966A Granted FR2259376A1 (en) | 1974-01-30 | 1975-01-30 | Laser sound detector system with source generating light beam - has reflecting means at distance from source |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS50132802A (fr) |
DE (1) | DE2503633A1 (fr) |
FR (1) | FR2259376A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3932056A1 (de) * | 1989-09-26 | 1991-04-04 | Eduard Dr Rer Nat Preuss | Optoelektronische oberflaechenschwingungs-messanordnung mit einer reflexionslichtschranke |
DE19535488A1 (de) * | 1995-07-26 | 1997-01-30 | Wolfgang Koop | Verfahren und Vorrichtung zur optoelektronischen Messung des Verschiebeweges eines Objekts |
DE19728653A1 (de) * | 1997-07-04 | 1999-01-07 | Micas Elektronik Gmbh U Co Kg | Verfahren zur Bestimmung der Oberflächenschwingungen von Körpern |
US9928705B2 (en) | 2015-06-16 | 2018-03-27 | Utc Fire & Security Corporation | Threat detection system |
-
1975
- 1975-01-29 DE DE19752503633 patent/DE2503633A1/de active Pending
- 1975-01-30 JP JP50011967A patent/JPS50132802A/ja active Pending
- 1975-01-30 FR FR7502966A patent/FR2259376A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2259376B3 (fr) | 1977-10-21 |
JPS50132802A (fr) | 1975-10-21 |
DE2503633A1 (de) | 1975-08-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |