IMX298 autofocus mechanism type


I would like to know if Arducam 16MP Autofocus USB Camera for Computer with Microphone, 1/2.8" IMX298 Mini UVC USB2.0 4K Video Webcam, with 3.3ft/1m Cable for Windows, Linux, Android and Mac OS focus is controlled in close or open loop?

The focus is controlled in an open loop.