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I did try placing my finger on the isolation table while making an exposure. (I may be completely mistaken, but you or someone else mentioned something like this -- sorry if I have you confused with another holographer.) The motion I introduced was probably huge -- maybe a few millimeters. (Another...

Yes, no and possibly irrelevant. Speckle is caused by the rms of a surface, a figure giving the non-uniformity of an apparently flat surface. So, if you have two nearby points on a surface where the variation in height is > λ/2 (~ 300nm), then you get interference due to the extreme coherence of the...

Hi Jody It's from today's (9/28) New York Times Business/Technology Section. It's too large for me to scan all of it, but here ( https://www.nytimes.com/2023/09/27/technology/personaltech/meta-quest-3-vr-headset.html ) the full article. You'll need a Times subscription to read all of it. Basically, ...

From the article: "Imagine reading a holographic recipe in the corner of your eye, while cooking." Also: "After a two hour session playing with Quest 3, I removed the goggles and asked Meta employees the $10 billion question (that's the amount the company invests annually in VR techno...

Still, I get some gems that arrive in my inbox. Here is one from today I felt compelled to share. I particularly like the "I think you have a 7+ figure business" part. I had no idea we were so valuable. The heck with 7 figures! We're over 9 figures! Somewhere between 3 and 10 billion - ht...

The jig to hold your laser pointer and the plate holder seem to be on carpet. You need a solid surface - a metal plate, for example - that must be secured so it doesn't rock, ie it sits solidly. The plate holder doesn't seem to have anything securing the plate. The object seems to be sitting on the ...

Yes, true. Consider a set of Bragg planes. If the planes are all parallel from two perfectly collimated and perfectly monochromatic, sources (physically impossible), then all the Bragg planes would be at a specific angle and a specific spacing and reconstruction only happens when the reconstruction ...

The HUD market is now reaching upward of $100 million. They've come a long way from when I was making them in 1986!

https://www.insightmedia.info/automotiv ... -investor/

I agree it's not easy to set up your own holographic studio. It's rather specialised and expensive. Basically, you first need an environment which is largely vibration free, such as a basement with a concrete floor or a garage (there are people who'll tell you they've made holograms on a wooden floo...

Joe, I’m not sure if you mentioned what laser you were using as I read through. But I find the PL 530 laser has a hotspot more so than other lasers do. What that means if you need to throw more light away on the edges and use that central version like you had to with, other typical Diode Lasers , i...