HW-related tips

EVK4 focusing

If you are using an EVK4 and have problem getting a proper focus, make sure that you inserted the C-CS adapter between the EVK4 case and the provided optic.
This adapter is provided in the EVK4 box.

GenX320 CM2 module focusing

If you have purchased an EVK/RDK with GenX320 CM2 module, then note that its focus has been adjusted during the manufacturing process at a hyperfocal distance (8cm) that allows to be in focus up to infinity. However, during transport, the lens focus can be slightly changed and then it needs to be re-adjusted manually.

To focus GenX320 CM2 module with its tiny M6-mount lens, you need to grab the lens by its notches and rotate it to slightly screw in/out. For easier focus adjustment, we provide a focusing tool with its 3D model in the attachment to this page that can be 3D-printed.

Focusing procedure

Using Focus Adjustment tool from Metavision SDK

Prophesee offers an out-of-the-box application for Focus Adjustment.

Learn more on Metavision SDK Docs

Using a blinking chart on your device

Blinking Siemens stars

1. Place your camera at the target distance at which you need to be in focus (it should not be shorter than the Minimal Object Distance (MOD) of your lens).
2. First, maximally open the aperture (if it can be adjusted) to obtain a smallest depth of field.
   
3. Then, adjust the focus distance until the pattern in the center of blinking object is visible (especially in the region marked by red color on the screenshot)
   

Properly focused camera, see how the smaller stars are clearly visible

areas of the Siemens stars to focus on

4. Once the focus is good, adjust the aperture to obtain a needed depth of field.