Archive for May, 2007

Here be fringes

Tuesday, May 15th, 2007

My first attempt at building a Bath Interferometer has been successful. It is amazing that a working interferometer can be constructed from a cube beam splitter, a small front surface mirror, a tiny lens, a laser pointer, some hot glue, an aluminum strap, and a small piece of balsa wood. All credit for the success […]

Foucault Testing

Tuesday, May 15th, 2007

It is very important to remember that the standard when taking Foucault test readings is for the values to increase as the distance from the mirror to the knife edge increases. Failure to remember this simple fact will result in hills becoming valleys, and visa-versa. Fortunately, I discovered my mistake before attempting to do any […]