Kingsview makes prisms to any shape or size with the smallest currently made at 0.5×0.5 mm right angles. Over many years we have produced a standard range of periscope prisms for the British Challenger Tank and the M2 Abrams and were supplied to Helio Mirror Company. We are able to produce angles better than 10 seconds and can be confirmed with Rank Taylor Hobson auto collimators. We can also pitch polish to exacting flatness which can tested on a Zygo interferometer and mirror coat or A/R coat specific faces.
Example Prisms: Roof prisms, Penta prisms, Cube beam splitter, Right angle or whatever you require.