Holographyforum.org / holowiki.org

I have finally gotten around to updating the for-sale policy. The For Sale / Trade forum now has a "Forum Rules" banner that reads as follows: Finding new homes for holography-related items is encouraged. Even commercial enterprises with goods to offer are welcome as long as it is in the s...

I took it as 12cm x 12cm. 12 cm square vs 12 square cm.

Sergio's recent post offering for sale photopolymer film reminded me that we should revisit the whole "selling policy" for this forum. Just so we are clear, too, I have no problem with Sergio's post. My general thoughts are that the buy/sell/trade section is a great benefit for the forum m...

PFG-01 plates, right? Two or three seconds exposure seems short. With the smallest 63mm x 63mm plates, and modest beam spread I'd expect you to be in the 5 - 10 second range.

During development, do the plates darken significantly...to the point you can see the safe-light only dimly through them?

The classic pyrochrome bleach is 4 g potassium dichromate to 4mL sulfuric acid (or 12 g sodium bisulfate) to 1 l water. Your formula is 2.5 times stronger, so, yeah that might explain things. The excess KDC could account for the yellow, too.

Very long, and not the most dynamic speaker, but well worth watching.

Thank you for sharing that link.

Richard Ralliston had a lot to say about DCG formulations. Rallison claimed that water content influenced both thickness and bandwidth and dichromate content had an effect on not only sensitivity but also color shift. There is an unlinked page on the holo-wiki that summaries Rallison's findings: htt...

IRC = "Internet Relay Chat". It started out as a simple chat-room sort of thing back in the infancy of the Internet. It has fallen well out of favor with all the new-fangled things we have these days. mIRC is something of the standard implementation for an IRC client. There are lots of cus...

The first and last are current limited below your requirement. Not sure about the middle one, though. By the way, one AA battery might yield about 2,000 mAh. Four of them x 1.5V x 2,000 mAh nets you 12,000 mWh of energy. Let's estimate your conversion to 9V efficiency at 67%, so you are at 8,000 mWh...

Is this of any use: http://www.electroschematics.com/6788/3 ... converter/