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Thanks to both of you for the references. changing wavelength was the Gabor's original idea behing the holography. Looked up Gabor's original paper . Sure enough, he mentions these concepts there. Maybe that's where I should have started huh? :) Here is the end of the paper: If the principle is appl...

MT= dXi/dxo= 1/(1 +/-zo/mu*zc–zo/zr)(Meyer; paraxial) MT= (cos(alpha)o/cos(alpha)i){1/(1 +/-zo/muzc–zo/zr)} (Champagne; non-paraxial) The longitudinal magnification is: ML= dZi/dzo= -(1/mu){1/(1-zo[(1/muzc) + (1/zr)}2 = -(1/mu)M If I'm fixing typos correctly we have: MT = dxi/dxo = 1/(1 ± (1/mu)*zo...

lobaz wrote: ↑Sun Jun 30, 2019 1:23 pm You can make a holographic stereogram.

This hadn't even occured to me. Seems like by far the best way.

Thanks lobaz that is extremely helpful, not just the result but how you derived it. reconstruction wavelength is equal to mu/m * recording wavelength, So the bottom line is you can only get perfect magnification by stretching the holographic pattern, and even then you need to use either a higher dif...

Here's another idea - what about a multi-stage scenario? Say we magnify the object with a lens so that the image is now magnified 2x but due to the axial distortion it is 4x in depth. Then use a second lens to magnify it along a new axis so that height and depth are magnified 2x and width is 4x. Fin...

Also wondering about solutions using unconventional optics. One way I can imagine is to record the hologram digitally, alter the pattern somehow (is it a simple algorithm?), and render as a CGH. Also, how about an HOE? Is there a fundamental reason it can't be designed to do undistorted magnificatio...

I was afraid of that. How about during playback of a hologram? I've heard you can make an image look deeper by illuminating the hologram using a diverging beam instead of a collimating beam (might have it backward). Can you correct for a lot of longitudinal distortion using that method? Or does it h...

Is there a way to make a hologram of something that is magnified in size? You can use a lens to magnify an object but as I understand it that will also distort the longitudinal scaling. Is there a way around that to make an undistorted hologram of a magnified object?

Found some better info on the Slavich website https://www.slavich.com/holo_ufg-panchromatic. They quote 3mJ/cm² for green and red and 2mJ/cm² for blue. Here are the correct plots. holo-ufg-panchromatic-fig1-3.gif Found some other useful info while researching this. Here is an optical density plot fr...

What is the best exposure to use for PFG-03C plates at 532nm? The website says 3µJ/cm² for "exposure peak sensitivity", it looks like 4mJ/cm² in the first plot below, and in the second plot it looks like -2 log(cm²/µJ) = 0.01 cm²/µJ = 100 µJ/cm²? Am I interpreting these right? Got any advi...