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Posts Tagged ‘Lee Filter’

Red Red Wine Plexiglass 2423

December 14th, 2011 5 comments

I have tested a Mini VAT resin with a 3mm thick sample ( 2423 ) red transparent
acrylic plexiglass piece provided by a local company and the results are only
mediocre.

It seems to block some, but not all of the UV and Near Visible.
Comparing to a Lee Filter sampler “Bloody Red”, the 2423 allowed a 0.5mm resin
slice to polymerize in 2~5 minute exposure, while when it was placed over the Lee Filter it did not
exhibit any polymerization for 20 min.

 

This is what it looked like in the mini VAT. A tribute to the RepRap crowd for inspiration and information.

I would assume (have to confirm) it will be safe if used with an incandescent or florescent bulb. Do not expect the red 2423 to stop the UV from sunlight or other sources from ruining a VAT full of resin and the print.

…Ever have an Eurika! moment?

September 27th, 2011 5 comments

As the previous post shows my waste of time on  something trivial, this one is exhilarating! Eurika! I yell…

Cut a piece of 70mm sewer pipe that is 22mm high. Slid it over the lens assembly and fired up the projector…

 

In case you are wondering where I have gotten the Lee Filters from http://www.leefilters.com/lighting/contact/ and request a sample pack. The filters are fantastic for other uses!

WARNING! You should not look into the projected image – temporary or permanent blindness may occur.

Always consult and follow  your manufacturers user manual. If  you decide to disregard the manufacturers safety instructions…well, you are on your own. You have been warned. I take no responsibility nor am I liable for the stupidity of others!

I managed to get the image down to 30mm X 40mm WOOWWWW!

If you are not convinced look at the caliper…

You can see the Lee Filter information “(HT) * 027 MEDIUM RED” as to the wavelength the filter applies to.

If you are wondering how was I able to focus the image on such a small area, I had this little gem in my “Ebay” box. I remember buying one as a gift for someone, but cannot remember who. I was able to use it to photograph my fingerprints-see below:

 

I looked though the microscope and filter, and adjusted the focus until the little letters under the “DELL” logo are clear or focused, as far as my vision can tell.

UNDER NO CIRCUMSTANCES SHOULD YOU LOOK THROUGH THE MICROSCOPE AT THE IMAGE THE PROJECTOR CREATES WITHOUT PROTECTING YOUR EYES FIRST! This blog is for informational purposes only.

Hope you have a great build day too!

E U R E K A !

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