Optical Testing

COS made interferometric testing techniques more accessible to the astronomical community, both professional and amateur. The introduction of the Ceravolo interferometer, and kit components required to construct it, made long path difference interferometry accessible to many small optics shops and amateur telescope makers. COS also popularized the Ross null test for testing telescope mirrors. Our precision Reference Element and Ross null lens are back by popular demand.

Fringe Analysis

Interferometry

Reference Element

Ross Null Lens

Using the Ross Null Lens