5th Camera ring in S23 Ultra

[Dr_Roy]

What is the fifth ring on the back side of S23 Ultra?

I found details of 4 camera rings but no detail available about the fifth one.

Please explain. 

[owl123]

That's the laser autofocus

[Dr_Roy]

What is use of it?

[_AdithyaKrishnan]

It is depth sensor and laser autofocus sensor, laser autofocus sensor is used to solve focus hunting issues, as it a 200 mp main sensor focusing of subject is tough so with that sensor camera can focus subjects instantly, depth sensor is used for identifying depth in potrait shots

[vinayshah]

Its called ToF "Time of Flight". It's used for laser focusing for depth in the pic, separationof subject, portraits, bookeh effect etc...