How may I show different view in HMD and on screen?

Hi there, I’m working on a Steam VR project and now the view projected onto screen is exactly what the player can see. What I wanna achieve is like below:

  • Player still gets a first person view in HMD

  • Third person view on PC screen so spectators can get a clearer watch

Is there a simple way to let PC screen render view of certain camera in game, and at the same time, not affect the view in HMD?

Would also like to know how to do this!