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Re: Inherent click delay found in mice.
Posted: 27 Apr 2015, 00:57
by nimbulan
spacediver wrote:is there a surefire way to figure out the native dpi of a mouse/sensor?
It's very difficult information to find in my experience. Your best bet would be to try to find out the exact sensor model in the mouse and look that up, rather than the mouse itself, though I'm not sure if specs for mouse sensors are even publicly available.
Re: Inherent click delay found in mice.
Posted: 27 Apr 2015, 04:25
by flood
spacediver wrote:is there a surefire way to figure out the native dpi of a mouse/sensor?
get a microscope and image the pixel array
invert the spacing between the pixels and multiply (or divide... not sure, too lazy to think atm) by the lens magnification ratio which is usually provided in the datasheet (e.g.
http://www.pixart.com.tw/upload/ADNS-21 ... 110417.pdf )
Re: Inherent click delay found in mice.
Posted: 27 Apr 2015, 10:47
by spacediver
interesting, might be able to do that with the macro setup.
Re: Inherent click delay found in mice.
Posted: 27 Apr 2015, 16:42
by flood
yup, and if your depth of field is narrow enough you can probably get very accurate measurements ( if you calibrate against something else first)
im not sure how to crack open the sensor chips though
but you can see some pictures here
http://utmalesoldiers.blogspot.com/2014 ... 0.html?m=1
Re: Inherent click delay found in mice.
Posted: 27 Apr 2015, 17:40
by spacediver
yes, I have my ronchi ruling for calibration and it works perfectly.
Not sure if I want to risk anything by cracking open my sensor. I have a very fragile setup - old deathadder 3.5 sensor frankensteined to a logitech wingman mouse. It's a one of a kind and I'll be devastated if something happens to it :p
Maybe I can hunt down a broken mouse that has the same sensor (Avago S3888).
Re: Inherent click delay found in mice.
Posted: 27 Apr 2015, 18:40
by flood
or just ask skylit on ocn :p
Re: Inherent click delay found in mice.
Posted: 28 Apr 2015, 16:12
by stirner
On most sensor casings I have seen the top is just mounted on and can be removed relatively easily.
With microscoping the problem I mostly ran into is getting proper lightning from above, but there's specialised gear for that naturally.
In that pcgamer logitech interview they revealed a common actual surface coverage of modern arrays is about 30 micrometer a pixel.
Re: Inherent click delay found in mice.
Posted: 28 Apr 2015, 17:24
by sharknice
stirner wrote:On most sensor casings I have seen the top is just mounted on and can be removed relatively easily.
With microscoping the problem I mostly ran into is getting proper lightning from above, but there's specialised gear for that naturally.
In that pcgamer logitech interview they revealed a common actual surface coverage of modern arrays is about 30 micrometer a pixel.
That would be about 800 DPI which is extremely common.