.
. My
Background
.
.....I was born in La Plata City,
capital of Buenos Aires Province in Argentina in 1948.I studied and
worked at La Plata University
until reaching the Ph.D. in Physics, under orientation of Dr. Mario
Garavaglia, who later created CIOP. I was
invited in 1975 to join the staff of the Physics Institute, Campinas State
University-UNICAMP, at Campinas, São Paulo, Brazil. This was certainly because I started doing holography in
1969, which was a very exciting and new technique in Latin America.
It gave me the feeling that many things can be
developed by just using white light. That holography was not so far
from photography as we thought, and that diffraction under white
light, a phenomena that happens in the color of
butterflies, is not completely studied and understood in science.
A natural complement to this experiences was the diffractive screen, an already knowm element,
but never before employed under white light. By projecting on it the
diffraction encoded images, goggless viewing of images in continuous
horizontal parallax was possible.
We obtained in 1988 all the fundamental results
allowing high quality projection directly from an object, projection
of diffraction encoded photographs, a TV goggless stereo projector
and, two years later, the enlarging of a Leith-Upatnieks hologram from
a 35mm frame of film. We employed screens 15cm wide and 30cm high,
made of embossed material. This size could only be increased by
working on AGFA film 30cm x 40cm and, in 1993, we reached the largest
size, thanks to the collaboration of Dr. P.M. Boone at Rijksuniversiteit Gent, Belgium.
I will do my best to resume more than 26
years of professional activity. Now that no more large size (larger
than 10 cm x 12 cm) holographic film is produced in the world (see the page of
HoloNet if you did not visited yet) , I
think that it is important to show first how we succeeded
in enlarging holograms UNDER WHITE LIGHT from the very practical
format of 35mm film to a 0.75m (H) x 1.14m (V) diffractive screen. This
technique can provide HOLOGRAPHIC
CINEMATOGRAPHYandECONOMY OF FILM..
By cliking on the title you can know my work on electronic images,
very close to holographic TV, which I develop with profesors Paulo Licio deGeus, Cândido Xavier de
Mendonça Neto. You will find basic information on
this subject in "HOLOGRAPHIC TV
PROTOTYPES", and in the thesis of 1998 of our former student Émerson.
As an introduction, read a thesis made in 1994
, another in 1998, and
an article.
published in 2.000, both are the starting point for this application.
You can also read our article presented at the meeting "SIBGRAPI
96" .
Or you can get my article "The use of Diffractive Screens for
Electronic Imaging"(hodic.pdf
357 kb), presented at a Holographic Displays Artists and Engineers
Club-HODIC meeting, Japan, september 1997, published in their report
V17 N1. Or see our last article.
A way of projecting objects which gives perfect "holo" appearence to
the images was discovered by Prof. Lunazzi in 1989. The scene is
bright, has movement, the projector is compact, and the screen 15 cm
(H) x 30 cm can be produced in industrial quantity.
We invented a new kind of images which,
without a lens or whitout it as a main element, white-light images are
generated having new properties. One of this properties is the
reversing of depth. Although not having direct application already, our
work is useful to better understand holoimages and may also help to
better develop the theory of the spaceship telescope, a project which
is being developed in USA. It is remarkable that the experiences can be
made with so common elements as digital disks (CDs, DVDs,
SDVDs)
Should be the dream of any holographer. Since it was invented by Gabor,
holography was conceived as a purely monochromatic technique and is
only registered under laser light nowadays. The visualisation of
holograms under white light was possible by techniques of
monocromatisation: wether by intrinsic filtering technique
(after Denisyuk, isolated inventor of holography), or by spatial
vertical distribution of wavelentghts (Benton). Some attempts were made
to register under white light, but no successful technique is known to
be applied. It seems now that the holographic community no longer
thinks on that possibility. The diffracting encoding of depth allowed
Dr. Lunazzi to make his own proposal, published already in 1990, which
is based on that principle and on the addition of the interferencial
registering of wavelength on photographic film, like in Lippmann
photography.
Stereoscopy
Development of images with three-dimensional visualization by using
classic techniques, until reaching the elimination of the need of
special goggles or any visual aid, by means of the diffractive
("holographic") screen. See a first sample by cliking on title.
We made two kinds: holograms for storage of dental casts (year
1993), and holographic interferometry of skulls under deformation bt
orthodontic appliances (1.999- ).
Mi electronic address: lunazzi
@ ifi.unicamp.br
Because you visited me virtually, I would like
to know your opinion on this site
My telephone numbers are now (55) 193521-2451,
secretary 3521-2452, 3521-4145 (also fax by solicitating or to the
seven
ring). If you want to know about our Optics Laboratory at UNICAMP, click
here, and in that site you could also know about most of the
researcher in optics of the country.
