A Visit to Geola: General Optics Laboratory – Pulsed Laser Holography

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When I was in Canberra as artist-in-residence with the Australian War Memorial I managed to see some really amazing holograms (with many thanks to the Australian War Memorial for arranging this and National Gallery of Australia for allowing me to see their collections!). Thus I began hatching a crazy plan to make some holograms, which led me to travel to Vilnius to visit Geola (“General Optics Laboratory”), a company which has been producing analogue holography as well as developing a really interesting technique of digital holography using pulsed lasers. Geola’s pioneering holography techniques had also been mentioned by a number of Australian fine art holographers such as Paula Dawson.

(It is always worth noting that for a moment in time, the hologram had really seemed poised to be the successor to the photograph, with many fine art holography programmes developed in universities around the world including in Australia and UK between the 1970s and 1990s – even the RCA used to have a holography department)

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Margaret Benyon’s Totem (1979)
National Gallery of Australia – Accession No: NGA 2009.46
Materials & Technique: photographs, reflection hologram, ink, gouache, feather on paper
Dimensions: printed image 25.4 h x 20.3 w cm / Produced in Australia
Notice how the hologram actually remains a secret if the work is not lit or viewed from the right direction.

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Hologram made by Andrea Wise to test conservation techniques for holographic plates
Canberra, April 2017
I think what interested me most was how Geola had interpreted the method of digital holography into holopixels. One of the senior conservators at the National Gallery of Australia, Andrea Wise (who also had a passion for understanding how holography worked), told me of a useful way of thinking about holograms: if you break a corner off a hologram, that corner itself will already contain the data of the entire image. The concept of the holopixel then makes this fragment-whole relationship evidently clear: each holopixel is a separate element but each of the holopixels contains ALL of the image data at the same time – they are optical elements that when properly illuminated and viewed from different angles, will be perceived as a specific colour dot. When we view all the colour dots as a whole, it becomes interpreted by the eye and brain as an image that changes when viewed from different angles. (Viewing it with two eyes completes the illusion of our perception of the image as a three-dimensional scene).

Although the underlying physics is well-known and widely understood by scientists and students of science alike, the hologram somehow remains largely misunderstood by the average layman. Since the hologram exists as a physical photographic plate, it is sometimes confused as an extension of photography, although a hologram is not at all like a photograph because a photograph is an image but the hologram is a lens. Furthermore, today the word “hologram” is very loosely used to describe so many optical illusions (eg: pepper’s ghost, rear projection, volumetric projection, lenticular prints, virtual reality) to the point that most people may may not know what a hologram really is. When I tried to talk about my plans for the project to other friends, quite often a friend might say “Oh! Holograms! I’ve seen/made some before!” only for us to discover later on that what they thought was a hologram was not actually a hologram…

Even American electrical engineering professor Emmeth Leith, the co-inventor of three-dimensional holography, described his holograms as a “grin without a cheshire cat”. Over the years, three-dimensionality and then imagery was successively compromised, largely leaving only movement and colour behind. Technical limitations in holographic image production as well as certain cultural and commercial conditions have led to the overall flattening of the holographic image on both physical and symbolic level, resulting in total collapse of the holographic image to the image plane – to the point that today we mainly see the hologram in flattened embossed forms, in small particles…

Google Image Search: “Holographic”
As hologram retailers struggled to build a consumer market they began aligning themselves with science museums and technology centres to try to capture national audiences on a mass consumption level. Ultimately this distanced the hologram further and further away from being a medium for narrative. Despite having a premature demise in a commercial sense, the hologram still entered cultural consciousness as a medium designed for future mass consumption, in its general disappearance from the public eye it transformed into a staple of science fiction films and the imagination. But it is not just in people’s imagination that the hologram has been changing. Holographic techniques have also been continuously developing! You might be surprised to know that today you can produce holograms from moving images, and that they can be in full colour today!

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On an unexpectedly normal and ordinary street on the other side of the world, sits the rather nondescript office of the lab called Geola.

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It used to be that analogue holography had to be on in labs which were completely free of vibrations – so the labs would involve huge concrete tables and had to be far away from civilisation and all the vibrations from cars and noises. But Geola has devised a pulsed laser system which has no such vibration problems! (Cars are running on the roads outside! You can walk in the room with the printer inside it!)

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This was a room that had to be seen in person.

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Despite its similarity to a photo plate, a hologram is nothing at all like a photo, and there’s also no way for me to adequately represent it in photo alone.

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This is the printer. The holopixels in this digital holograph are recorded onto photosensitive media using two pulsed laser beams – one is spatially modulated by using LCD display and focused into a 1.6mm x 1.6mm square acts as the object beam, another laser beam acts as the reference beam. The modulation is done such that the object beam at the point of interference with the reference beam contains the same information that would have come to this point from a real object (except that here we might be using film footage or 3D rendered scenes as the source). The reference beam interferes with the modulated object beam, recording the hologram of the image on the photosensitive media.

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After exposure the holographic photoplate is processed using a conventional photographic process.

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After chemical processing the photoplate is dried and then the holographic photoemulsion is protected by lamination of black self-adhesive film and acrylic sheet using a standard cold lamination machine.

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Real 3D Scene shot from a drone

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Virtual 3D Scene (as evidenced by designer who forgot to connect trees to ground)

See the video documentation here:

Thank you to Ramunas for showing me around Geola!

The Invisible Holography Section and a Holographic Reading List

I’ve been doing a considerable amount of reading and research on holography (and fine art holography) lately, so as I was passing through the National Library of Singapore the other day I decided to look in on what they had in the general lending section. Much to my surprise I saw that Holography had its own category in the dewey decimal system!

Oh sweet well let’s go to 774 then…

Alright here are all the books from 771…

And here are all the books from 775…

HOLD ON…

THERE ARE ABSOLUTELY NO BOOKS UNDER 774?


If you do search the NLB catalogue, you will find that they have got a few books on Holography at 774 – but these books are all reference books! So there are no books on holography for the masses. Oh no! So there is no chance that one might be blindly wandering through the shelves, hoping to randomly soak up ideas from library books and BLAM! A HOLOGRAPHY BOOK SECTION! But no! There isn’t any Holography Section, even though the word appears on the bookshelves. OH BUT HOW WILL WE DEVELOP (OR REVIVE?) THE HOLOGRAPHIC ARTS IN SINGAPORE THEN?

When you google for “Dewey Decimal 774” it says that 774 is no longer being used for Holography. However, if you google for the most updated version of the DDC 23 it says 774 is still Holography. Maybe the wikipedia page needs editing. (I’m not an expert on DDC to be honest)

Nevertheless there are actually a whole lot of very excellent books about holography out there, which I don’t feel have been represented here. So I’ve decided to write out Debbie’s recommended reading list if one wants to read more about holography:

A HOLOGRAPHIC READING LIST!

1. Johnston, Sean. Holograms: A Cultural History. Oxford: Oxford University Press, 2016.

If you’ve ever asked the questions “why do we no longer see holograms everywhere? why did the medium fail commercially? and why does it persist as a science fiction staple?” then this book will answer all your burning questions! This book explores what caused the rise, demise, and apparitional persistence of the hologram in visual culture. Its publication was preceded by Johnston’s 2006 book, Holographic Visions: A History of New Science, which is also definitely worth a read.

2. Schröter, Jens. 3D: History, Theory and Aesthetics of the Transplane Image. London: Bloomsbury Academic, 2014.

Beyond the term hologram, we can think of the 3D image as a transplane image, which Schroter’s book attempts to trace through history and theory. Schroter also edited another book “Das Holographische Wissen” edited with Stefan Rieger but alas I do not read German.

3. Falk, David S., Dieter R. Brill, and David G. Stork. “Holography.” Seeing the Light: Optics in Nature, Photography, Color, Vision and Holography. N.Y.: Harper and Row, 1986, 368-393.

There are tons of hardcore mathematical books explaining holography (interference pattern of coherent light is by now so well known to man and a staple in physics classrooms) but this remains one of the most classic textbook explaining the maths and optics behind much of photography and holography (Chapter 14). Practical yet poetic and accessible for readers even without maths or science backgrounds.

Other recommended readings:

(These are books which I’ve personally found useful in thinking about scientific approaches, technological innovations, and military technology’s influence in ways of producing images / transplane images / art)

1. Galison, Peter and Caroline A. Jones, eds. Picturing Science, Producing Art. New York: Routledge, 1998.

2. Virillo, Paul. The Vision Machine. London: British Film Institute, 1994.

3. Bishop, Ryan and John Phillips. Modernist Avant-Garde Aesthetics and Contemporary Military Technology: Technicities of Perception. Edinburgh University Press, 2010.


To be honest the above list is simply whatever I’ve enjoyed reading recently – so if you asked me to compile another holographic reading list in a few months time I expect the list will have expanded over time… so this….. IS TO BE UPDATED IN THE FUTURE!

DBBD Does Documentation: Now on Youtube!

A new development over the last month! I’ve rather belatedly discovered the joy of doing lots of video documentation! For a person who seems to have struggled inexplicably with slow internet or intermittent wifi/internet for years now (damn you telcos and inconvenient travelling plans!) it does take me more time to edit and upload these morsels, but I think the effort is well worth it!

Here is what my time in Australia looked like – featuring: Australian War Memorial, Anzac Day, Last Post, Changi Quilt, Science Museums, Natural History Museums, dioramas, holograms, magic lanterns, pepper’s ghost, parallax barrier grid, lenticular prints, vr goggles, aerial views, optical illusions, transparent OLED touchscreens and other projections and reflective things. And also lots of bugs and birds (because I like bugs and I like birds). Maybe it makes no sense to others (George thought it was “exhausting”??) but surely that short-attention-span 2-second-jump-cut format is still recognisable to all who use instagram/vine/fb?

It was only halfway through my visit that I realised that using video made a lot more sense than using photos to collect visual references (I kinda regret not doing it throughout my entire trip!). So I have to admit that the selection of clips here shows a rather random slice of my time there that just so happened to be caught on video, rather than being representative of my whole time in Canberra/Sydney/Melbourne…

In addition to discovering the joys of video documentation, I decided to make a new youtube channel! But since the channel looked really sad and boring when it only had one video on it, I decided to re-upload a bunch of old videos I’ve made, and then one thing led to another, and now I’ve given them some ALL NEW AND HILARIOUS DESCRIPTIONS!…. (please read descriptions before watching)

 

THE DBBD YOUTUBE CHANNEL

https://www.youtube.com/channel/UCynhKJ773XGc5gqvis0ZaRg

BLENDER SPEED MODELLING

“Hi Everyone. Here is me speed modelling the MBK-12 a few years ago, also known as the B.E.A.R. You might have seen something like it in Battlefield 5. I made my own changes to it, and I have released this as a game asset which is available for free download on the Unity game store. Quite happy with this one, but admittedly its really not my best work considering the evolution of my 3D skills since then.”

 

CG ANIMATION EXPERIMENT

“Hi guys, here’s an experiment in crowd dynamics made with Miarmy for Maya, which I made as a previs for this personal CG animated short film that I’m trying to finish in my free time. It’s going to be a thrilling Post-apocalyptic Zombie-Alien-Invasion-meets-Counter-Historical-Fantasy science fiction thriller with lots of drama and emotion, and mental acrobatics. You can probably see where I’m going with this example.”

 

DIY SLIME TUTORIAL

“HI EVERYONE! TODAY’S VIDEO IS A DIY SLIME RECIPE TUTORIAL, ITS SUPER EASY AND FUN. SORRY ABOUT MY VOICE, MY MIC IS A BIT OLD SO ITS NOT PICKING UP EVERYTHING, I’M JUST TURNING 12 AND MY MOM WON’T GET ME A NEW ONE TILL CHRISTMAS THIS YEAR. THANKS FOR WATCHING! ITS GONNA BE AWESOME! LOVE U GUYS”

IF YOU ENJOYED THIS PLZ SUBSCRIBE TO THE DBBD CHANNEL FOR MORE:
https://www.youtube.com/channel/UCynhKJ773XGc5gqvis0ZaRg

(Sorry my channel is only 1 day old / not yet 30 days old / so it can’t have a custom URL yet)
Clearly I’ve watched too many youtube / slime videos / speed modelling videos / cg experiment videos…