| 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 YC*`n3D|'
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High-precision prisms, having maximum angle tolerances wvr`~ e
of 1 to 3 arcsec, find increasing application in optical metrology. > R\@W(-g`
Reported interferometric techniques for measuring bF +d_t
the wedge angles of such prisms achieve a precision of up KT<N
;[;
to 0.1 arcsec ~Ref. 1!, while noninterferometric techniques T%YN( f
have a precision of up to 2 arcsec ~Ref. 2!. Reported noninterferometric V:AA{<
methods have made use of goniometers,2 eYv+tjIF
spectrometers,3 master prisms,4,5 and collimators.6 However, %r:4'$E7|
in the literature there are few reported methods for \PmM856=ms
measuring the pyramidal error, and the majority rely on UK[+I]I
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visual observation,2,7,8 by which it is only possible to measure +]Z *_?j9{
pyramidal errors to the order of 1 arcmin ~Ref. 8!. 8yuTT^
In the new arrangement presented here, one can measure C Y!H)6k
the prism angle and the pyramidal error separately or in Jf@Xz7{z
combination. This is possible because the measurements !~-@sq
are made simultaneously but with different techniques.
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