Just a few years ago, mobile displays took a leap forward with increased pixel densities that ensure crisp images on realtively small screens. Today, most smartphones feature displays with up to 538 pixels per inch (ppi) – a resolution that is much higher than what the human eye can see. So what’s the next display innovation we can look forward to?
In her recent article on IEEE Spectrum, Sarah Lewin introduced two companies that are working on making what she calls “holographic” light field displays (i.e. glasses-free 3D displays) a reality.
Ostendo Technologies recently presented the results of nine years’ work at the Display Week conference: An array of 4×2 Quantum Photonic Imager chips (each consisting of LEDs, image processors and embedded rendering software) plus microlens array form a 1 megapixel (1024x768px, XGA resolution) prototype display which sends out light not into every direction – like conventional displays do – but rather into very narrow, collimated angles of light. This enables the prototype to emit different images into different directions, producing about 2,500 different perspective views, so the image and motion displayed appear consistent regardless of the viewer’s position. Continue reading
One of the limitations of Lytro’s LightField Camera is the fact that it has no internal flash or light to help in low light situations.
The new manual controls are a way to overcome some of these situations. Nevertheless, despite the value of ambient light, natural lighting and shadows, sometimes the available light is just not enough.
If you have some free time, you can easily make your own LED ring light for about 10 $.
For those who want something more professional, we present two (almost) off-the-shelf solutions for artificial Lytro lighting: Continue reading
The fact that the Lytro LightField Camera doesn’t have a flash basically limits you to shooting in the daylight, or with sufficient artificial lighting. The latter, however, is sometimes hard to achieve, which results in decreased photo quality.
With this little “How to” tutorial, we’d like to show you exactly how we made our own Lytro LED Ring Light for about 8 US-$.
We’ve already tested it in the wild, and it’s working great (for us, at least)!
What you need:
- a 70 mm LED light ring (available here for 4.50 $ incl. shipping).
- either a 9 V (rechargeable) battery + battery connector
or a transformer with 9 to 12 V DC output + fitting connector.
- the metal lid of a ~70 mm glass jar
- the lid of a yoghurt cup (or something similar)
- some insulating tape, transparent sticky tape, a drop of hot glue
Since the Lytro camera doesn’t come with a flash, we thought about making my own DIY ring flash for some time. Today, finally, the most important component has arrived in the mail: a little LED ring that cost as little as 3.50 €.
Here’s a quick photo of my first crude attempt to take close-up pictures with a homemade LED ring flash (ring light):
What’s more interesting, though, are the test photos taken with the Lytro camera: Continue reading