Tuesday, August 11, 2015

Brightway Offers its Automotive Gated Image Sensor

Automotive gated camera developer BrightWay Vision offers its fast gated image sensor as a product for sale. The company's Youtube video explains how it works, starting from time 1:18:



11 comments:

  1. What is the laser power coming from the illuminator to be able to see at 250m?

    ReplyDelete
  2. What happens if there are 2 cars with this laser on the road?

    ReplyDelete
    Replies
    1. An idea is, that the pulse frequency depends on the car direction (magnetic north). After a short detection phase everything should be in sync.

      Delete
  3. Hello,
    1) The laser power is not high as the technology uses multiple pulses/exposures per image frame readout.
    2) For a scenario with multiple similar systems there is no issue (i.e. saturation) as the technology offers two parallel solutions: the first very low overall pulses duty-cycle and the latter a very good pixel anti-blooming mechanism.

    Yoav Grauer
    Business Development & Technology Manager
    BrightWay Vision

    ReplyDelete
  4. The low-cost e2v ev76c570 sensor has also a range rating mode. 50ns pulse width. Multiple intregration possible.

    ReplyDelete
    Replies
    1. Daniel,

      The main problem is to have high quality TX gate in the pixel. The principle is simple and basically can be made with any GS sensor. If you create 1e noise for each transfer, then 1000 transfers will raise the noise to 33e ! If you can have CCD quality transfer gate, then it's an easy job to do this operation except high speed TX/RST signal propagation over a large array ...

      -yang ni

      Delete
  5. 50ns pulse is nowhere mentioned in e2v sensor. Go check it again. It just says 3D range gating in flyer and gives absolutely not details (does not even mention the name) in the datasheet. So strange!

    ReplyDelete
    Replies
    1. 50ns pulse is written in "EOS_AN_028.pdf". Please search. We implemented this feature last year with 100ns timing and it works perfect in our cameras. You can try it in real!

      And I agree to you, yang ni. It is very simple to implement. But you see more noise, more FPN, you detect the worse shutter efficency of this 5T cell and many other things. But you get multi integration! Recording 10 frames in one image apture is perfect for golf swing analysis. Also to add 1000 images of a constantly repeating process with a very short exposure is possible now!

      Delete
  6. I think that many ToF sensors can do also this job, am I right?

    ReplyDelete
    Replies
    1. In terms of shutter speed, noise etc. yes, of course. In terms of resolution not really. However, I don't know if you really need 1280x960 first of all...

      - Andreas Süss

      Delete
    2. But if you don't need timing information, then things are much easier and the pixel size/resolution can be increased from ToF designs.

      Delete

All comments are moderated to avoid spam.