RealSense D400 - Strobing IR Projection

[CWest4]

Is it possible to strobe the IR projection synchronously with the IR camera capture?

The purpose of this is a scenario where there is a secondary sensor that measures in the IR spectrum. The IR projection from the RealSense would interfere with this sensor. If the projection could be strobed, then the secondary sensor could be triggered out of phase with the depth measurements and IR projection.

[MartyG]

Rather than strobing the projector (if it is even possible), it may be better to use the D435 camera model's ability to sync its stream with external sensors using the four GPIO pins it has on it.

https://github.com/IntelRealSense/librealsense/blob/development/doc/rs400/external_devices.md librealsense/external_devices.md at development · IntelRealSense/librealsense · GitHub

[idata]

Hello ChristianW,

Strobing is not possible on RealSense cameras but it is possible to turn off the IR projector. Marty is right, you may be able to accomplish the same thing using the external hw triggers. More information on this capability is forthcoming.

Regards,

Jesus G.Intel Customer Support

[ÉLége]

Thank you for the answer. I have a complementary question though. If we turn off the IR projection, how much of an accuracy loss can we expect?

[idata]

Hello,

We don't have specific measurements for accuracy loss. It all depends on the lighting of the environment, distance, etc. The more light there is, the less you need the projector. You must test in your own target environments.Regards,JesusIntel Customer Support