Can this be a grating efect ?

[LesioQ]

Hi,

I'd like to learn of this effect of Heineken logo doubling be made with a diffraction grating after a scanner set?
Otherwise - is it a projected slide ?
See link (top picture):

http://www.lim8.pl/pokazy.html

Piotr.K

[keeperx]

scan the logo thru a diffraction grating.

[LesioQ]

What kind (name) of grating ? Does logo (=scan angle) need to be very small ?
Piotr.K

[keeperx]

looks like a special grating..

[soforene]

It may well be a Gobo.

[tocket]

If you scan graphics through a grating you will indeed end up with multiple images of it. I think the size of the image will be roughly the same as the original (non-diffracted) image, so it will need to be pretty small.

As for the grating I think it's a "burst" or matrix type. You can also combine two linear gratings.

[mixedgas]

As for the grating I think it's a "burst" or matrix type. You can also combine two linear gratings.[/QUOTE]


It is a grating.

Probably a very high quality burst grating from Laserworld, Dr Peter Meyer:

http://www.creativelaser.de/hardware/hardware.htm

You can also have custom ones made with software and electron lithography and Peter does that as well.

Steve Roberts

[mikkojay]

Oh my- the pic on that link you just posted is INCREDIBLE!
I WANT!

[LesioQ]

Well, since this is a grating effect the nice looking effect would be rotating the logo during scanning as this would result with each logo rotating around own local axis - I bet this one would be great !

However it keeps bothering my mind that since the angle between 0th and 1st order beam after the grating is pretty small, while the logos displayed aren't touching each other - the initial scan angle should (must?) be VERY small... or am I missing something ...

Piotr.K

[fuzcub]

Here's some examples of graphics scanned through gratings - some nice stuff:

http://laseranimation.com/products/p...e-gallery.html

Barney.