And not just pass along but also to be kept. My contribution to this effort is a potpourri of simple but elegant holograms and Holographic Optical Elements. They were recorded on the much maligned Agfa Holotest 10E75 emulsion on a polyester film base with anti-halation backing. This film is left over from my days working at Fermi National Accelerator Laboratory.
There are only eight copies of the in-line Gabor Hologram (entitled Denny's Dice) and one zone plate, so everyone should get only one of these two. (I am almost out of them, sorry! And not sure when I will get back to making more of them.)
You can be a bit more liberal cutting off Skull holograms and HOE's, as I have a nice stash of them back at the ranch, so let me know if they run out, and I will send out some more to add to the pass along.
And for those of you who did not participate this year, look at what you are missing! Being a good guy, if you contact me in care of the Holography Forum, I will send you an address so you can send me a self-addressed stamped envelope to I can send you some copies of the items below.
HOLOGRAPHIC ZONE PLATE
Almost every holographic tome name-checks the Fresnel zone plate, but I had not ever seen one in the flesh until I finally made my own! It is one of the hardest holographic set ups that I had ever attempted, if you want to make perfect ones!
The great-granddaddy of them all! Not many holograms are made in this configuration, because of two major flaws which will become obvious as you observe the reconstruction of this hologram’s image: one, you are looking directly into the reconstructing light source, and secondly, there is the pesky secondary, real image.
WHITE LIGHT TRANSMISSION IMAGE PLANE HOLOGRAM (PSEUDO-ACHROMAT)
Here is a Skull hologram, and you can identify it as mine by the twinkle in its eyes. Both this copy hologram and the master hologram were made with single beam techniques!
18 Degree DISPERSING GRATINGS
These gratings are made in the usual way, with two spatially filtered beams meeting up at the film transport with an angle between them of 18 degrees, both beams symmetrically 9 degrees from the normal.
ULTRA LOW SPATIAL FREQUENCY GRATINGS
(aka Christmas Gratings, as I sent them out to my friends this Xmas to look at their trees with.)
This is, surprisingly, a single beam geometry!
And it almost has to be, considering how large spatial filters are, especailly if you want to have about 1 degree between the two beams to generate lots of orders.
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