Category lasers

Using Holography and LEDs to Make Art

A while back, I had the opportunity to visit the studio of San Francisco artist Christine Remy, who creates holographic portraits and LED sculptures. Much of her art is subtle and contemplative, however, she has two projects that I found striking and even emotionally jarring.  One is a series of holographic portraits that are larger than life. The video doesn’t go into the details (and shows only one portrait), but the holographic series is composed of three-dimensional, animated images of a trio grieving women. As you move around the portraits, you get a different perspective of the women’s faces and their grief.

The other project is a persistence-of-vision piece in which a line of LEDs projects a life-sized image of a girl into air. It’s eerie because you can only catch glimpses of the girl out of the corner of your eye. Her presence if fleeting; it feels like you’re sharing the room with a ghost.

I kept the video short, trying to highlight as many projects as possible, but in doing so, I only touched on the wide range of Remy’s art, her motivation, and the technology behind it. If you’re interested in seeing more of her work, you can go to christineremyart.com. If you’re in San Francisco, I highly recommend a visit to her studio in the Mission District–the best way to experience her art is to see it in person.

The Return of the Raster

Shameful but true: I own and watch a CRT TV, in all of its big, boxy glory. This might be a sore spot for someone who has recently immersed herself in the study of Displays & Screens, but my reasoning is solid. The TV works, the display area is large, and the picture is beautiful. Also, I invested a fair amount of money in a delightful cabinet to house the set and its peripherals. This TV and cabinet have a few more years to go before I can justify the investment and annoyance of rearranging my living room to accommodate a flat panel display.

So, in light of my adherence to the CRT, it makes sense that I’m happy to report that the old tube technology is finding new life in a new type of display called laser phosphor display. LPD appears to have some of the advantages of more modern displays, but with a fraction of the power requirements. Both CRT and LPD raster images onto a phosphor, but where a CRT uses an electron beam, guided by a magnetic field, to activate the phosphor coating, LPD uses lasers, guided by a mirror.

Wade Roush, a friend and former Technology Review colleague, broke the story of Prysm, the LPD startup last week. I’ll be writing a story for Technology Review about the technology, adding some perspective from display experts and explaining a bit more of the technology. Stay tuned!

I got it in college and went on to buy an expensive (and beautiful) cabinet to hide it in, and just haven’t bothered to upgrade

On Crashing a CES Party

As this year’s Consumer Electronics Show wraps up, I’m reminded of a memorable night at a CES a few years back when I won big on nickel slots and crashed an intense laser TV party at the Palms.

I wasn’t invited to Mitsubishi’s Laser TV party at CES 2008, one of the most anticipated parties at the show that year. And it wasn’t for lack of trying. Before CES, I’d called and emailed Mitsubishi’s PR, and at the show I visited the company’s booth and hunted down on-site PR representatives. Basically, they all gave me the same answer. No can do, they said, if you’re not on the list, you can’t go to the party. To make matters worse, I didn’t even know where the party was, and I didn’t know how to find out.*

It was all quite frustrating to me because I had recently written a rather good article for Technology Review about the actual lasers that were to be used in laser TV. The technology was interesting and impressive to me. Plus, I was curious to see if laser TV would live up to its promise of vivid high-dynamic range, and amazingly crisp images.

On the night of the Mitsubishi party, all seemed lost. I had given up and started to pump nickels into a slot machine when I improbably won $44.70. Was my luck changing? After I collected my cash, I walked outside and saw a line of bus vans with their destinations posted in the windows, and one of them was going to the “Mitsubishi Laser TV” party. Jackpot. The ride was leaving in 10 minutes, the driver told me. So I strolled around for a bit and then joined a group of guys who stepped aboard just as the bus van was leaving.

Once at the Palms, we were guided by the kindly, young PR rep who had to endure the annoying (drunk) conversation of the group of men on the bus van. She seemed to seek me out as a fellow sufferer-in-sober-misogyny as we walked into the hotel. It was a good allegiance to make because an ally is often an appropriate substitute for a party invitation.

At the registration desk it was revealed that I wasn’t on the list. I put a quizzical look on my face–furrowed brow and a forced frown–and instantly my PR ally stepped in to “clear it up.”

We took an elevator up to the top floor of the Palms. The doors opened onto a cramped bar that was slightly wider than a hallway. I asked my PR friend if she could introduce me to someone who could talk about the technology behind the TV. She seemed skeptical and then came back with a Mitsubishi executive who avoided using any specifics when answering my questions. After the fruitless interview, I took my reporter’s notebook and explored the rest of the party.

In the main party room, there was one  65-inch laser TVs on display and only a few people left over from the main event–I had missed the official unveiling. Instantly, though, I knew that main room was not where I wanted to be: suited executives sipped cocktails in booths as barely clothed women danced on ledges above them. And the laser TV played on.  I quickly left the room to find something else to look at.

Luckily, there was another laser TV on display in a side room. And the video was 3D. I joined the crowd and was handed a pair of shutter glasses** to watch U2’s 3D concert. Bono kept reaching out to grab me, and I started to get a headache, so I handed in my glasses and continued to explore.

Going up to the mezzanine level, I  looked down at the main room again. The drinking men were gone, but the dancing women were still there. The mezzanine had access to the roof, and this is where I found the party’s producer. He had put all of this together, he told me. He also admitted that he was quite impressed by the laser TV. The thing they’re not talking about, he said, is how energy-efficient laser TV is. I nodded in agreement because I knew that in theory he was right. Soon our conversation dried up and we both just silently looked out on the desert cityscape, watching lights flash from the giant casino-hotel boxes. Finally I excused myself and left the party.

At the base of the Palms, I stood in a line for about 15 minutes to catch a cab. Amazingly, my driver was the same one who had taken me to the show in the morning. I was astonished at the coincidence, but my driver acted like it wasn’t a big deal. I asked him if it had ever happened to him before, trying to prove how astounding a coincidence it was, and he admitted that it had not. Still, he guided the conversation to the book that he was writing and his girlfriend was illustrating, and how he’s only going to be driving a cab for a little bit longer. At my hotel I paid the driver the fare, told the him goodnight, and went up to my room to file a blog post about laser TV.***

*At that time, I didn’t have a strong network of tech journalist buddies who could clue me in.

**The glasses synchronize with an infrared signal that comes from the TV.

***While you can buy Mitsubishi’s laser TV, called Laservue, for about $4, 000, the displays have not significantly shaken up the market. A great source of laser TV updates is here.

Long Exposures and a Laser Pointer

I recently got a Nikon D5000, my first foray into the world of DSLR cameras. I don’t know much about photography yet, but it helps to spend some time with friends who are into it. So last Saturday Dave, Jess, and I went to a skate park in Petrero Hill to snap some shots. I’ve included some below. (We came across the van on the way to the park.)

JessLaserLoops

JessLaserSmile

Here are some shots from Dave. He has an awesome shot of Jess that he got using his magic flash. He also documented us climbing over the park’s fence after we got locked in. Oops!

Exaflops on Beams of Light

A colleague of mine, Katie Bourzac, has written a post about the future of supercomputing according to IBM. Yes, the future is light. Essentially, the only way to find enough bandwidth to transport all the data required for future supercomputers is to use photons in waveguides, not electrons in wires.

The problem, however, is that it’s far to expensive to stick today’s lasers, detectors, modulators, amplifiers, etc. into computers. These devices are used to send data through the optical fiber that connects the world to the Web, but they are made of materials that are relatively expensive like indium gallium arsenide and others. There’s good news, though, for those who love supercomputers (and really, even if you don’t know you do, you totally do): there are a number of companies, including IBM and Intel, that are looking at using silicon–the same material found in electronics everywhere– for photonic devices.

If you know anything about bandgaps and optical properties of materials, you know that using silicon for photonics sounds a little crazy, but within the past five years, researchers have come up with engineering work-arounds that have made silicon feasible . And because silicon is at the heart of the electronics industry, and there’s a whole manufacturing infrastructure built around it, huge quantities of electronics can be churned out relatively quickly. Soon, photonic devices made of silicon could be churned out just as fast, and at such volume that their prices plummet. That’s when they can be integrated into computers and eventually chips.

It’ll take some time–some say at least a decade–but the gears have already been set in motion. Intel, for example, is pushing its photonics research into the market.  The company recently announced Light Peak, an optical cable that attaches a personal computer to peripherals, shuttling data at 10 gigabits per second. The first versions will contain old-school optics made with expensive materials. But Mario Paniccia, head of Intel’s Photonics Technology Lab hopes that Light Peak will be the Trojan horse to get photonics into the electronics industry; future versions will likely use silicon photonic parts.

Silicon photonics is a topic I’ve covered extensively for Technology Review. For the curious, here’s a link. I’ll continue to follow the work in the field because, from what I’ve seen, it’s the only way to keep pushing computation speeds. Also, it’s just so nerdy cool.

Nobel Given for Wrangling Photons

Often the Nobel Prize in physics is awarded to researchers who have devised some arcane theory that’s impossible for most people to comprehend. Not so this year.  The 2009 Nobel Prize in physics went to a trio of scientists who, in the 1960s, figured out how to harness light in revolutionary ways, laying the foundation for the modern information age.

Half of the prize goes to Charles K. Kao for figuring out why the optical fiber at the time limited the distance a photon could travel. The conventional wisdom at the time was that the fiber manufacturing process created impurities in the fiber through which light dissipated. Kao, however, theorized that the problem was the material. By proposing a purer form of glass, fuzed quartz, for optical fiber, he enabled engineers to extend distance light could travel in fiber from 20 meters to a kilometer.

Willard S. Boyle and George E. Smith, two Bell Labs researchers, share the other half of the prize. These two invented the CCD, a type of imaging chip found in digital cameras. The device takes advantage of the fact that electrons in a silicon crystal are jostled around when light hits it. The loose electrons are captured and counted, making up the pixels of an image.

Do Not Look At Laser With Remaining Eye

warning-laser-640

I was looking through the list of sessions at an upcoming optics conference in San Jose, Frontiers in Optics 2009, Laser Science XXV, and I came across a session called “Light in the Eye.” It reminded me of the funny(?) sign that my graduate advisor posted in our laser lab with a warning that resembled this one. The session is Tuesday, Oct 13, 2009, 1:30 PM – 3:30 PM, if anyone is interested.

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