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Laser beam dispersions |
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sscoyote
Optics Journeyman Joined: October/05/2004 Status: Offline Points: 328 |
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Posted: April/18/2008 at 00:42 |
Does anybody know if the beam dispersion on the Swaro and Leicas are the same size as the aiming dot they use in their units?
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Steve
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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If im reading you right, your wondering the angle of subtension is increasing as the distance increases (like the angle increases thru the circle), but the laser isn't or it wouldn't be usable. swaros are at least as small as minute of handshake.
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sscoyote
Optics Journeyman Joined: October/05/2004 Status: Offline Points: 328 |
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So Dale, you're saying that the beam is not angular like a subtension and the diameter of the beam remains the same no matter what the distance? I thought i'd read that it did disperse as range increases. Did i read that wrong?
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Steve
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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dispersion is caused by non -coherent wavelenths, lasers are monochromatic , and the light composing the beam is all the same wavelength. thus very little dispersion. they can also be focused like regular light beams. the dispersion is Gaussian but the distances varies on scales of magnitude compared to incandescentlight. normal light could be used to measure distance in the same manner, however the magnitude of the illumination would have to be increased to tremendous levels depending on the distance.
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mike650
Optics God Joined: May/14/2006 Location: West of Rockies Status: Offline Points: 14569 |
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Swarovski: http://www.swarovskioptik.at/index.php?l=us&css=&c=produkte&nID=x434b76ddc92ac6.78789379&techInfo=1&detail=usen1129133568__ID434 http://www.swarovskioptik.at/index.php?l=us&css=&nID=x434dfbf1cc4631.86128120&c=kontakt Leica: http://en.leica-camera.com/nature_observation/rangemaster/crf_1200/ http://en.leica-camera.com/contact/us/hunting_optics/index.html |
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sscoyote
Optics Journeyman Joined: October/05/2004 Status: Offline Points: 328 |
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Thks guys--'preciate it. |
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Steve
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