Welcome new user! You can search existing questions and answers without registering, but please register to post new questions and receive answers. Note that due to large amounts of spam attempts, your first three posts will be manually moderated, so please be patient.
Because of un-manageable amounts of spam despite our use of CAPTCHAs, email authorization, and other tools, we have discontinued this forum (see the 700k+ registered users with validated email addresses at right?). Please email us any questions or post bug reports and feature requests on GitHub at https://github.com/jevois -- The content below remains available for future reference.
Welcome to JeVois Tech Zone, where you can ask questions and receive answers from other members of the community.

dirt / hair on my ar0135 sensor => how can i fix / clean it ?

0 votes

i am toying around with the ar0135 => https://www.jevoisinc.com/products/jevois-1-2mp-global-shutter-sensor-with-9-dof-imu-upgrade-kit-monochrome

I manage to see the live feed in jevois-inventor but i have some sort of a trace on the image. I unscrewed the lens and it seems to be some dirt or hair (hard to say) inside against the sensor. 

i do not dare touching it. not cleaning it.

what can i do to fix that without damaging the sensor?

asked Mar 4, 2019 in User questions by fourchette (580 points)

1 Answer

0 votes
Best answer
Oh, so sorry, this is annoying. We are still working with the factory to make sure this does not happen in the future. From the sensor manufacturer (OnSemi), we receive sensors with a piece of yellow tape on top of it. This is so that it will not get scratched when the pick and place machine takes it out of the tray and places it on the PCB. Then, after the board is soldered, the tape has to be removed. On the samples we have looked at so far, we have found that sometimes indeed there is some dust which was under the yellow tape. In such cases, the sensor should be cleaned before the lens mount is added. But I guess your unit was not cleaned well.

There is a protective piece of glass on top of the chip. So there is little risk of damaging the chip. You should clean the glass with any microfiber cloth that you would normally use to clean glasses, camera lenses, etc. I would try to avoid any chemical at first, but if needed you could also use a small alcohol pad or iPhone wipe, and then wipe out all the alcohol with a microfiber lens cloth.

We have used these here in the lab to clean expensive DSLR cameras and lenses with good success:

answered Mar 4, 2019 by JeVois (46,580 points)
selected Mar 5, 2019 by fourchette
we blew compressed air on the sensor and the "thingy" disappeared. i'll order some of those cloth. thanks for sharing the link
great idea, we will keep that in mind, thanks!