Image Sensors World

Kinect seems to have done alright without any help...

2012-05-29T12:06:45.609+03:00

Kinect seems to have done alright without any help from Apple.

It is a long way down to those deeper wells and yo...

2012-05-29T11:56:38.700+03:00

It is a long way down to those deeper wells and you would need a long neck that would be fully depleted at high potential to reach down there and do complete charge transfer out. Not impossible, just unlikely at these dimensions and operating voltages.

I think 90dB instantaneous dynamics at 300 K is ov...

2012-05-29T11:22:39.914+03:00

I think 90dB instantaneous dynamics at 300 K is over CIS state of the art. There should be a typo about RON in the data sheet. RON should be 42 e- for gain 0 (300 000 e- FWC) and 10 e- for gain 1 (30 000 e- FWC), and not the opposite as edited.

Similar Kinect but resolution improve.

2012-05-29T03:57:34.772+03:00

Similar Kinect but resolution improve.

Without Apple, none of these tech companies will s...

2012-05-29T02:17:05.946+03:00

Without Apple, none of these tech companies will succeed in mass producing gesture technology.

This video should be placed on the porno site :)

2012-05-29T01:00:44.125+03:00

This video should be placed on the porno site :)

My iPhone 4 flash LED does a pretty good job casti...

2012-05-29T00:21:23.627+03:00

My iPhone 4 flash LED does a pretty good job casting a clear shadow on the ceiling of a reasonably dark room. Its beam is probably 45-degree wide. y-resolution is not so good though, and the finger must be close to the light in order to see the scaling effect. I'd go with a matrix of LEDs aimed at different angles.

If you have an iPhone 4, just download a flashlight app and try it out.

Hi, I'm not a specialist, but in my opinion c...

2012-05-28T23:44:33.466+03:00

Hi,
I'm not a specialist, but in my opinion celling shadow is posible only with laser, or very collimated light. they mention that they use cameras, so there are more than one I think that there are more than two. I think that it could be matrix of sensors...

Maybe a passable ad for Kinect. But all those wavi...

2012-05-28T23:14:21.375+03:00

Maybe a passable ad for Kinect. But all those waving and gesturing, just for controlling the volume of the TV? While standing within arm's reach? I say she's asking for it. No doubt that sex sells. And suggestive room numbers. And fart jokes.

These patents apply to devices with 3.3 and 2.5 mi...

2012-05-28T21:10:11.128+03:00

These patents apply to devices with 3.3 and 2.5 micron pixels that Foveon once made for use in cell phone cameras. .

Eric, why do you think there is no complete charge...

2012-05-28T14:47:09.622+03:00

Eric, why do you think there is no complete charge tranfer please ?

-yang ni

Nope, not at all.

2012-05-28T14:15:12.104+03:00

Nope, not at all.

Does the Foveon sensor have anything to do with th...

2012-05-28T11:39:26.515+03:00

Does the Foveon sensor have anything to do with these patents:

http://www.google.com/patents/US7745773
http://www.google.com/patents/US7339216

That's exactly the problem: if how this thing ...

2012-05-28T06:24:12.851+03:00

That's exactly the problem: if how this thing works is known, then so will its limitations, and all the hype and upsell are killed right there. And if my theory is correct, this solution does NOT work well in quite a few scenarios: outdoors, lecture halls, ceiling lights, etc. I'm sure the math is interesting. But like I said this is probably good for a student project but not much more.

Relative to the display, x is horizontal, y is ver...

2012-05-27T22:45:19.642+03:00

Relative to the display, x is horizontal, y is vertical, and z is the orthogonal distance the to the plane of the display.

We can come up all day long with all kinds of solutions, and fixes to prpoblems those solutions, as it seems you have suggested. I just wonder if someone actually knows.

And nothing wrong with patenting a solution if it works well.

Another way is to use two LEDs and light them up a...

2012-05-27T21:32:21.855+03:00

Another way is to use two LEDs and light them up alternatively. The distance of the shadows on the ceiling gives you y. Or one LED and two cameras but that would be stereovision and he said it's not the case. An easy concept and I'm surprised you could't get it. Maybe I should have dropped out of school and start patenting obvious things =) Z

By "y" you mean the distance to the tabl...

2012-05-27T21:21:53.468+03:00

By "y" you mean the distance to the table? That is given by the scaling of the shadow as I said.

2012-05-27T20:37:11.165+03:00

This comment has been removed by the author.

You are joking I hope. Ceiling projection could g...

2012-05-27T15:41:26.161+03:00

You are joking I hope. Ceiling projection could give you x and z but not y.

300Ke alone might be reasonable. 300Ke in combinat...

2012-05-27T10:28:02.953+03:00

300Ke alone might be reasonable. 300Ke in combination with 10e of noise starts to be difficult. Still possible to achieve though, just needs careful design.

BTW, state of the art full well of 3um pixels is closer to 20Ke:

http://www.imagesensors.org/Past%20Workshops/2005%20Workshop/2005%20Papers/52%20Agranov%20et%20al.pdf

One needs epi of order 100um to reach 30% at 1000n...

2012-05-27T10:20:05.769+03:00

One needs epi of order 100um to reach 30% at 1000nm. And even then it's not easy. Look, for example, at e2v QE curves:

http://www.e2v.com/products-and-services/high-performance-imaging-solutions/imaging-solutions-cmos-ccd-emccd/qe-curves/

Yes, the long wavelength over 900nm QE is good. Bu...

2012-05-27T04:49:05.504+03:00

Yes, the long wavelength over 900nm QE is good. But the pixel size is large and thick low doped Epi layer more than 10um could be applied to increase NIR QE in that case.

Hasn't the answer has already been suggested i...

2012-05-27T02:43:40.596+03:00

Hasn't the answer has already been suggested in a previous post? They use a couple of IR LEDs and a single camera looking at the shadow of the hand projected onto the ceiling. Vertical motion is given by the scaling of the shadow. Horizontal motion is given by panning and stretching. Combine the two and you have 3D. Next time someone gets a chance to talk to him, just ask him if the thing works outdoors ;) can't believe someone dropped out of school for this. it could become a nice final-year project =) Z

I don't see why 300k electrons is not reasonab...

2012-05-26T22:41:50.189+03:00

I don't see why 300k electrons is not reasonable. 3 micron pixels with low fill factor have maybe 10k electrons and the 48 micron pixels from Radicon (Dalsa) hold 2.8 million electrons. The FBX-2 number seems right in the middle of these.

No, it can not replace the touch screen. Because t...

2012-05-26T20:21:56.338+03:00

No, it can not replace the touch screen. Because the fielf of view ia conic, so it has to be placed either very far from the screen or at the corner of the screen. This is an example of NIT's sensor inside a touch screen: http://www.youtube.com/watch?v=-Ie0OIGU2Kc
It should be hard to use this device.

-yang ni