[论文]Measuring the angles and pyramidal error of high-precision prisms [复制链接]

Measuring the angles and pyramidal error of high-precision prisms _sw,Y!x%dF  
vk{dL'  
High-precision prisms, having maximum angle tolerances .vwOp*3\  
of 1 to 3 arcsec, find increasing application in optical metrology. +   
Reported interferometric techniques for measuring Z!tt(y\  
the wedge angles of such prisms achieve a precision of up
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to 0.1 arcsec ~Ref. 1!, while noninterferometric techniques '%)7%O,2  
have a precision of up to 2 arcsec ~Ref. 2!. Reported noninterferometric sgFpZk  
methods have made use of goniometers,2 taI])  
spectrometers,3 master prisms,4,5 and collimators.6 However, UiW(/L  
in the literature there are few reported methods for M]eH JZ~v  
measuring the pyramidal error, and the majority rely on wS8qua  
visual observation,2,7,8 by which it is only possible to measure /J1O{L  
pyramidal errors to the order of 1 arcmin ~Ref. 8!. Nqy',N  
In the new arrangement presented here, one can measure e>Is$+[`7  
the prism angle and the pyramidal error separately or in hCc I >[H5  
combination. This is possible because the measurements O /aC%%  
are made simultaneously but with different techniques.