1/2 wave plate holder

There are times when you need an inexpensive way to rotate an optic and not too long ago I had just such a need.

I purchased a few half-wave plates off eBay some time ago and needed a way to rotate them without breaking the bank.

It was time to go to the hardware store and see what I could find.

Continue reading “1/2 wave plate holder”

Want a photopolymer that works?

Over the weekend I had the time to start testing the latest batch of photopolymer from Polygrama and I have to tell you that it was a pleasure to work with. But let me back up a bit and take you to the beginning of the testing session.

[first posted Tuesday, March 15. 2005]
[updated 3/30 with the latest round of results & consolidated into one post] Continue reading “Want a photopolymer that works?”

PCGG-II hand-off hologram

As others are aware, it took way too long to finish (partly because I was being over-ambitious in what I wanted to do and partly because it was an open-ended “artistic” endeavor) but the PCGG-II hand-off hologram is complete and in the Padiyar’s possession.

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Welcome our newest US citizen… Andres Ghisays

Today Andres Ghisays (who was born in Columbia) will become a US citizen. He’s off this morning to be sworn in and in honor of this occasion I’ve created a hologram just for him.

[model shot added on 4/2/2005] Continue reading “Welcome our newest US citizen… Andres Ghisays”

Building a holography table with Hexcel

As some already know, this paper took forever to finish but it’s done and ready for the world to read.

If you’ve got any comments or questions just let me know.

Here’s an excerpt from the the introduction:

This paper describes the methods used by myself and Andres Ghisays in building our latest tables as well as a set of recommendations for those considering doing the same.

Hexcel is a honeycomb material often used by the aerospace industry for making structural panels that are very light but extremely stiff or strong. They’re used in aircraft wings, walkways, satellites, Moon-bound spacecraft and can even be found in many cars.

Hexcel honeycomb (hereafter just referred to as "Hexcel") as discussed here is a flat panel made out of aluminum in the shape of a honeycomb.

Click here to download and read the PDF paper Continue reading “Building a holography table with Hexcel”