Measuring the angles and pyramidal error of high-precision prisms BbI),iP  
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High-precision prisms, having maximum angle tolerances z.W1Za  
of 1 to 3 arcsec, find increasing application in optical metrology. tfv@ )9  
Reported interferometric techniques for measuring (JiEV3GH  
the wedge angles of such prisms achieve a precision of up >P6U0  
to 0.1 arcsec ~Ref. 1!, while noninterferometric techniques M+4S