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In this video, I’ll be showing as a proof of concept how to make a real cheap, but, quite reliable light source using a 50 mw. LED pointer with a fixed wavelength in order to use with Optical Flats.
A Xenon or any laboratory type fixed wavelength is quite out of reach for any hobbyist or small shop owner, this option of using a LED with a known wavelength isn’t pretending to be as precise as a multi thousand of dollars instrument, but, will allow for reasonably accurate measurements in non-critical situations.
The fixed wavelength allows the Optical Flats to create a pattern by reflection and diffraction on a polished surface, the goal is to measure the flatness of that surface, and, knowing the wavelength we’re being able to quantify the amount of irregularity if there is any.
Please take note that I'm using the term laser for the light emitting diodes, in fact a real laser is a very different technology, it's a bad habit to call a LED a laser diode...
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DISCLAIMER:
All the tools referenced in this video were paid for by me, none were given or discounted more than any other regular purchaser…
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Here are the links to reach the tools demonstrated in the video
Be sure to look out for discount coupons or any special offer at different time of the year…
GOPHERT CPS-3205 0-32V 0-5A Portable Adjustable DC Power Supply 110V/220V CPS-3205II U
goo.gl/fwhz4S
532nm 50mW Thick Beam Green Laser Module Projector For Bar Stage Exhibition Stand Lighting
goo.gl/gWwfaz
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More event links.
15% off Home Hardware & Gadgets -- goo.gl/7am9x1
(coupon: a3c4a7)
15% off DIY Good Helper -- goo.gl/PPtBGc
(coupon: Fasteners)
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Philippe’s KZfaq Channel:
Phil’s Projects
/ phildesjardins1
Thank you for watching and I hope you like this type of video…
Thumbs up, a comment and even better a subscription is always a great way to say you appreciate the efforts I put in the making of those videos… 😉
Pierre Beaudry
wledpierre@gmail.com