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2024-05-14 08:52 |
Measuring the angles and pyramidal error of high-precision prisms
Measuring the angles and pyramidal error of high-precision prisms ikB Yd
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High-precision prisms, having maximum angle tolerances '|>9C^E9X
of 1 to 3 arcsec, find increasing application in optical metrology. M6r^L6$N
Reported interferometric techniques for measuring `fXyWrz-k
the wedge angles of such prisms achieve a precision of up rX7QbAB
to 0.1 arcsec ~Ref. 1!, while noninterferometric techniques Q:C$&-$
have a precision of up to 2 arcsec ~Ref. 2!. Reported noninterferometric S/ywA9~3Q
methods have made use of goniometers,2 qB]i6*
spectrometers,3 master prisms,4,5 and collimators.6 However, 3VnQnd E
in the literature there are few reported methods for nwt C:*}
measuring the pyramidal error, and the majority rely on RPnRVJ&"Z
visual observation,2,7,8 by which it is only possible to measure ;^Sr"v6r>u
pyramidal errors to the order of 1 arcmin ~Ref. 8!. VQI(Vp|
In the new arrangement presented here, one can measure { %v-(
the prism angle and the pyramidal error separately or in k^ F@X
combination. This is possible because the measurements \'CN
are made simultaneously but with different techniques.
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