Scale plane to resolution

I need scale a plane with texture used as background to screen resolution with a orthographic camera.

I am implementing a page of a book (plane used as background) and i need animate the plane, this is the reason I use a plane and not a guitexture.

Anyone can help me?

In Orthographic mode, the Camera.orthographicSize is 1/2 of the vertical size. You can use the ratio of Screen.height/Screen.width to get the width in world coordinates. Something like:

height = Camera.main.orthographicSize * 2.0f;
width = height / Screen.height * Screen.width;