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File: Matrixw.jpg (217 KB, 800x672)
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I really hope a cmos nerd can help me. I need a sensor from which I can pull 3 images at 1/2000sec interval (the 3 images being unbuffered and different of course). Is it possible ? I don't need a cmos capable of 2000fps video, just 3 frames. I know I can push the SONY IMX219 to a continuous 1000 FPS but the format is terrible I would like to keep at least 1080p. Is there any hack where I can pull few images at incredible speed or I need a sensor capable of sustained 2000fps ? How delusional am I ?
Another question : is there a sensor without shutter ? Where I can just read any pixel when I want to ? I feel like this is a more natural way of achieving my goal but it sound more analog so I'm not sure it does exist
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>>2583525
ok nobody has replied. have you ever interfaced with a raw image sensor? have you ever soldered a bga? can you read a datasheet? if so then i can't help you lol, but if not then you're shit out of luck
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>>2583525
go hit up the digikey or mouser catalogs
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>>2583525

You flat-out can't do this the way you want to. CMOS sensors don't have any kind of buffer that you can fill up and empty. If it can spit out two separate frames, one after the other, 500┬ÁS apart, it can do it indefinitely. In other words, yes, you DO need a sensor capable of 2000FPS.

The best that you could MAYBE do is to throw away a bunch of your resolution and just clock out the first couple hundred lines before taking the next image. Whether or not this will actually work depends on how the sensor clocks out data. I'm not familiar enough with the topic to know how many image lines are ganged together per output line, but I imagine that's sensor-specific.

>is there a sensor without shutter

You're asking it weird, but I think what you're asking is if there's a sensor that allows "direct" access to the photosites. Again, not familiar enough to know, but I seriously doubt it. Image sensors like this are inherently accumulating devices. The photosites gather photons, and accumulate charge proportional to how many hit the photosite in a given amount of time. You can't read them instantaneously because their entire purpose is to measure the amount of light gathered over time. Even if you're asking if you can just let them accumulate charge between reads...how is that any different than just using the amplifier and ADC built into the pixel already?
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Is there a reason you can't just use three separate sensors?
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>>2583525
>needs to take three images
>unbuffered
wat?
what do you think a buffer is?
it's memory.
if you want to take more than one image, you'll need a buffer.
>how delusional am i?
extremely.
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>>2583525
why do you need it? I've worked with optics, this can maybe be done differently.

Can you use 3 cmos sensors and trigger them one after anther?
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>>2583525
Without knowing the full scope of your project, it will be hard to help, but from what you posted, it's simply not possible since your images need to be stored somewhere before you take another image with the same sensor. If the sampling interval is 1/2000, you need to be able to read the entire image before you sample your second one, which effectively means a controller that is capable of 2000 fps per second. The only alternative is to use multiple chips in parallel like >>2585128
, then sample each one after the other. once the three images are captured, you can then read them over a longer period of time, assuming of course this is a one time thing and you're not sampling 3 images every 1/2000 sec. Furthermore, make sure that your sensor can actually hold the image for the length it takes you to sample them, i'm not very familiar with such chips, but you might start have signal degradation if you wait too long after the image is taken to read them.

There might be other solutions possible, but it's not possible to know without having the full picture of what you're trying to accomplish.



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