آموزش جامع فاصله یاب های لیزری how laser distance meters work?
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Laser Distance Meters
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- - - - :Time Of Flight- :Phase Detection- :Triangulation- -Stand off/Range-sensitivity -Resolution- - Polarizer-Reflector
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2 :1- ()2- (Ultra Sonic)
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. :1- .2- .3- .4- . 15 200 .
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:A- .
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B- .
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Light Amplification by Stimulated Emission of Radiation . . . . 3 : .
4 :
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- (He-Ne ) (Co2 ) : (Nd:YAG) . . : - - - - - - - X
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:
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Gas Lasers
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Chemical Lasers
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Dye Lasers
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Metal Vapor Lasers
Solid State Semiconductor .
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ANSI Z136 IEC 60825.
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:Class 1,Calss 1M,Class 2,Calss 2M,Class 3R,Class 3M,Class4
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2 :
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1- (Time-of-flight measurements)2- (Phase-Shift Method)3- (Triangulation)
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Time Of Flight Measurement . .C t . .
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TOF1- . . passively Q-switched microchip Er:Yb:glass 10 10 . .2- . . .
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3- 2 . . .4- Start Stop .5- .
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Q-SwitchingQ-Switching Giant Pulse . . ( ). Mode-Locking Q-Switching . .
Q-switching Q-Switch 0 Q Factor . Q factor .
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. . TOF . .
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Range : . Phase Detector +2n . 1 300 150 . Mid Range .
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Triangular Method . : (Base Line) .
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L :
. . Single Spot Triangulation .
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Single Spot1- .2- .3- .4- .
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Image Plane P X P1 P2 O Path of Laser Optical Axis .
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O m c C.:
Y1,Y2 :
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(f) Y1,Y2( ) .uP :
:
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(3) X :
N,K,d : X1,X2,u1,u2 . . X . .
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1- . Stand Off . . ( )
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. . 2 :1-CMOS,CCD: .2-PSD: .CCD PSD .
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. .
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Stand Off/RangeStand Off .Range . Range Stand Off .
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Sensitivity . . . A B
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Resolutionresolution . .
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(Specular) (Diffused) .
90 ( ).
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. Base Line .
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. .
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. . .
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. .
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Polaroid Filters Polarizer . .
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( ) Reflector . .
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RetroReflectorRetro reflector . Field .
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http://elmi.akairan.com/elmi/maghalat-bargh/11899.htmlhttp://www.rp-photonics.com/distance_measurements_with_lasers.htmlhttp://en.wikipedia.org/wiki/List_of_laser_typeshttp://en.wikipedia.org/wiki/Laserhttp://en.wikipedia.org/wiki/Triangulationhttp://www.rp-photonics.com/triangulation.htmlhttp://www.mtiinstruments.com/products/lasertriangulation.aspxhttp://en.wikipedia.org/wiki/Laser_safetyAnd Some Attached Files
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