Recent content by skaiser

@Twigg , thank you for the suggestions, I will give these options a try and report back! Regards

DaveE- I am using a 632nm HeNe. I will describe the entire system a little more clearly..... The HeNe is sent through a spatial filter to replicate a point source very far away. This divergent source is then recollimated by a very large off-axis parabola. This is where my 4f system takes the...

I am using 2 lenses in a 4f configuration. The input is a large collimated beam (632nm). After passage through the 2 lenses the beams vertical dimension remains constant, however, the horizontal dimension get smaller, as if it is being focused only in the horizontal direction. Does anyone have...