Measuring the angles and pyramidal error of high-precision prisms i$}G[v<4  
$sb@*K}:4  
High-precision prisms, having maximum angle tolerances `mYp?NjR_  
of 1 to 3 arcsec, find increasing application in optical metrology. Xt:j~cVA  
Reported interferometric techniques for measuring wv\"(e7(  
the wedge angles of such prisms achieve a precision of up Yt:%)&50}-  
to 0.1 arcsec ~Ref. 1!, while noninterferometric techniques sAs`O@  
have a precision of up to 2 arcsec ~Ref. 2!. Reported noninterferometric Au/'|%2#(  
methods have made use of goniometers,2 ,1!Y!,xy  
spectrometers,3 master prisms,4,5 and collimators.6 However, qJK9
C`T%  
in the literature there are few reported methods for n!~QC  
measuring the pyramidal error, and the majority rely on
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