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1)aperture photometry,¿×¾¶²â¹â

2)aperture photometry,¿×¾¶²â¹â·¨

3)borescope

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4)diaphragm aperture,¹âÀ»¿×¾¶

5)clear aperture,ͨ¹â¿×¾¶

6)aperture diaphragm,¿×¾¶¹âÀ»

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Based on diffraction integral formula and selfª²reproducing principle,diffraction integral equation for transverse modes in a circular symmetric resonator with an aperture diaphragm was disintegrated to finiteª²sum matrix equation,and field distributions of transverse modes in the resonator were calculated by solving matrix for eigenvalues and eigenvectors.

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