Very high power laser chamber optical improvements

A beam reverser prism comprising:

• a chamfered corner opposite an input face of the prism, wherein the chamfered corner is between a first reflective face and a second reflective face wherein the chamfered corner has a chamfered surface and wherein the surface is less than about 0.5 mm in width, wherein a first distance between a first incident point and a chamfered corner, wherein a first distance is between a first incident point and a chamfered corner, wherein the first incident point is on the first reflective face of the prism and the chamfered corner is formed between the first reflective face and a second reflective face of the prism, wherein an input laser beam is directed to the first incident point, wherein the chamfered corner includes a polished chamfered surface, the polished chamfered surface includes a polished finish substantially equal to a reflective surface finish of at least one of the input face, the first reflective face and the second reflective face.