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03-05-2016, 04:26 AM #17
 Class 3B Laser Join Date: Jan 2014 Location: Baghdad, Iraq Posts: 4,243 Rep Power: 2080
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Re: Tom Campbell - Mechanics of Individual Worldviews

Cyp. I didn't ignore the question, I'm having a personal crisis right now to deal with, not in a frame of mind to get into too much heavy conversation right now. Besides I think the task of trying to put the infinite into limited word is futile, destined to fail.

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http://www.lexellaser.com/techinfo_wavelengths.htm

Laser Safety:
http://www.laserpointersafety.com/index.html

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

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Last edited by Alaskan; 03-05-2016 at 04:30 AM.

03-05-2016, 05:16 AM #18
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RedCowboy
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Re: Tom Campbell - Mechanics of Individual Worldviews

Hang in there pal, you can overcome most anything, remember to never give up! But you can sometimes take a break and solve a problem fresh after working on something else for a moment.

Hope can be good, we can always have hope and if it eases the mind then it has value.
Sometimes simply having hope can allow someone to find the truth without the bearing the extra weight from abandoning it.
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You can not put freedom in a bag.
It is in fact an abstract concept.
Yet it is the single most valuable thing anyone has ever had.

Last edited by RedCowboy; 03-05-2016 at 05:29 AM.

03-05-2016, 06:00 PM #19
 Class 2 Laser Join Date: Jun 2010 Location: New Hampshire Posts: 276 Rep Power: 210
planters
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Re: Tom Campbell - Mechanics of Individual Worldviews

Quote:
 I'm having a personal crisis right now to deal with, not in a frame of mind to get into too much heavy conversation right now.
OK, fair enough. Lighten it up with what IS going well.

I have heard there is a display, green fiber laser in Europe that is putting out over 300W. And, when you are talking fiber laser and not fiber pigtail-ed then diffraction limited divergence is typical.

The days are getting noticeably longer and the sun is on the return.

LIGO has detected gravitational waves! Certainty, to the 1% level with a measurement of 1/100 the diameter of a proton has detected the accelerating frequency of merging black holes. This is with the world's largest laser interferemeter; the most sensitive measurement device yet created by man. An upgrade has already been proposed.

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