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Laser beam dispersions

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/18/2008 at 00:42
sscoyote View Drop Down
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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?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/18/2008 at 08:29
Dale Clifford View Drop Down
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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.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/19/2008 at 15:14
sscoyote View Drop Down
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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?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/19/2008 at 17:39
Dale Clifford View Drop Down
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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.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/19/2008 at 20:35
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Originally posted by sscoyote sscoyote wrote:

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?


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

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/20/2008 at 21:43
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Thks guys--'preciate it.

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