FIELD: measuring engineering.
SUBSTANCE: device comprises corner mirror with two mirror surfaces which define the right angle between them, flat mirror, and adjusting units. The optical axis of one of the channels to be tested passes through the corner mirror. The optical axis of the second channel to be tested passes through the flat mirror. The device is additionally provided with several corner and flat mirrors. Each pair of the mirrors defines a prism and used for testing one channel of the article with one wavelength. The adjusting instrument is made of a built-in collimator provided with several light sources having different wavelengths.
EFFECT: enhanced accuracy of testing.
2 cl, 3 dwg
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