I am trying to solve a problem my camera exhibits. It has a sensor with 6000x3376 pixels. HD video is 1920x1080. In order to reduce the amount of information to the processor the camera throws away 2 out of 3 pixel lines. this creates a problem with thin lines tike telephone lines and makes them jagged. I thought a good idea might be to place behind the lens a plate of Lithium Niobate or some such birefringent crystal to take rays that would normally terminate in the unrecorded pixel lines and displace them vertically to the recorded line. They would combine and blur a little but alleviate the aliasing problem seen here: It is my understanding that the "ordinary" ray that enters the crystal exits as parallel ordinary and extraordinary rays. One dot becomes two dots. As I understand it each of these rays are linearly polarized orthogonal to each other. If those rays then travel through another crystal, what is the effect on each of these rays?