Inherent click delay found in mice.

Everything about latency. Tips, testing methods, mouse lag, display lag, game engine lag, network lag, whole input lag chain, VSYNC OFF vs VSYNC ON, and more! Input Lag Articles on Blur Busters.
User avatar
nimbulan
Posts: 323
Joined: 29 Dec 2013, 23:32
Location: Oregon

Re: Inherent click delay found in mice.

Post by nimbulan » 27 Apr 2015, 00:57

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.

flood
Posts: 929
Joined: 21 Dec 2013, 01:25

Re: Inherent click delay found in mice.

Post by flood » 27 Apr 2015, 04:25

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 )

spacediver
Posts: 505
Joined: 18 Dec 2013, 23:51

Re: Inherent click delay found in mice.

Post by spacediver » 27 Apr 2015, 10:47

interesting, might be able to do that with the macro setup.

flood
Posts: 929
Joined: 21 Dec 2013, 01:25

Re: Inherent click delay found in mice.

Post by flood » 27 Apr 2015, 16:42

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

spacediver
Posts: 505
Joined: 18 Dec 2013, 23:51

Re: Inherent click delay found in mice.

Post by spacediver » 27 Apr 2015, 17:40

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).

flood
Posts: 929
Joined: 21 Dec 2013, 01:25

Re: Inherent click delay found in mice.

Post by flood » 27 Apr 2015, 18:40

or just ask skylit on ocn :p

stirner
Posts: 74
Joined: 07 Aug 2014, 04:55

Re: Inherent click delay found in mice.

Post by stirner » 28 Apr 2015, 16:12

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.

User avatar
sharknice
Posts: 295
Joined: 23 Dec 2013, 17:16
Location: Minnesota
Contact:

Re: Inherent click delay found in mice.

Post by sharknice » 28 Apr 2015, 17:24

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.

Post Reply