| 电子厂女工xp |
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 l:- < CbG
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High-precision prisms, having maximum angle tolerances q:ah%x[
of 1 to 3 arcsec, find increasing application in optical metrology. =GJ)4os
Reported interferometric techniques for measuring /k^!hI"4c
the wedge angles of such prisms achieve a precision of up X-k$6}D
to 0.1 arcsec ~Ref. 1!, while noninterferometric techniques (t_%8Eu
have a precision of up to 2 arcsec ~Ref. 2!. Reported noninterferometric h}&1
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methods have made use of goniometers,2 9AP." RV
spectrometers,3 master prisms,4,5 and collimators.6 However,
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in the literature there are few reported methods for EAZLo;
measuring the pyramidal error, and the majority rely on C2(VYw
visual observation,2,7,8 by which it is only possible to measure o_R_
pyramidal errors to the order of 1 arcmin ~Ref. 8!. y*H rv
In the new arrangement presented here, one can measure 2`P=ekF]
the prism angle and the pyramidal error separately or in WlW7b.2.
combination. This is possible because the measurements %R m`+
are made simultaneously but with different techniques.
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