Hand drawn holography software

[RaulBSP]

Hello

For those who want to experiment with hand drawn holography art,
here is a site http://3dalter.50megs.com/ with a program
for making scratch patterns from .3ds objects, and some suggestions too.

Raúl.

[JohnFP]

I alway thought it would be neat to make the scratches into a hologaphic film using a laers and and x-y table with stepper motors....

[Colin Kaminski]

I always wanted to use an old plotter. Hmmm....

[Colin Kaminski]

Hello

Here is a video clip of a monster's head hand-drawn hologram, made using 3dSilhouette program.
http://www.youtube.com/watch?v=A40e2PgHPCQ

[Tom B.]

I think the major problem with trying to make scratches digitally rather than by hand wih a compass is that for best signal to noise ratio, the scratch must be smooth and continuous and not a stairstep approximation. Each scratch is a curved mirror which reflects a point of light with apparent position depending on the radius and viewing angle and if it is not a smooth arc, the parts that deviate from the ideal arc will reflect light at the wrong angle, creating a noisy image. Maybe if the resolution was very very fine (microns?), the problem would diminish?

[Colin Kaminski]

Hi Raul,

Can you email me the software? colin at holographyforum dot org.

It looks like fun.

[Colin Kaminski]

For those whol do not know about the original work see here:

http://www.amasci.com/amateur/holo1.html

I made a few when I first found this page.

[glajciorz]

This one is great, Raul

What was the model ?
Did you use equal depth pages ?
Did you draw with compass or with machine ?
How long did it take you to draw scratches ?

greetings
Adam

[RaulBSP]

Thanks Adam

I used a 3d Head made with 3dMeNow program that generates 3d heads from profil and front photographies of a person.
With equal depth pages, 46 pages where generated (depth from 30 to 120), but printed only 23, I merged them by pairs
for saving paper.
Hologram was drawn with a compass on A4 transparency sheet, it took approximately 4 hours to completion.

Regards,

Raul.

[Colin Kaminski]

I have been playing with Raul's software and it is quite fun. I am excited about trying another Scratch-O-Gram. Raul kindly provided me with the information to make a wiki entry here:

http://www.holographyforum.org/HoloWiki ... tch-O-Gram

The software is stored on The Holography Forum server.

Thank you Raul!

[RaulBSP]

Hello

Thanks Colin! I appreciate much your interest in my work. 3dSilhouette still has some
little bugs, but I'm working to fix them. I will send to you further improvements of the
program in order to update it on the forum server.

saludos,

Raúl.

[AyT]

Dear Raul/all,

I downloaded your software and used it, I have not yet printed it out because I don't have a compass here.

What I noticed though is that your scratching image is not the same as what would be produced by using the line images.

My proceeding is as follows:

Horicontal lines: Put the (in my case virtual) compass on the rightmost point of the line. Expand it so the radius is equal to the line's length. Rotate the compass clockwise around 90 degrees. Use that point as an imaginary center and draw an arc from left to right or vv. within the Second and First quadrant.

Vertical lines: Put the (in my case virtual) compass on the lowermost point of the line. Expand it so the radius is equal to the line's length. Use that line as an imaginary center and draw an arc from left to right or vv..

fich001 is being produced, vergleich is what comes out of your line images. What is right?