FIELD: physics.
SUBSTANCE: interference light filter has a Fabry-Perot resonator in form of two plates with mirror coatings placed with a gap between them on holders of a mechanism for moving the plates. Between the mirror coating and the plate there is a compensation layer whose thickness varies in accordance with a law which provides equivalent arrangement of the mirror coatings relative each other.
EFFECT: simple design due to exclusion of an adjustment device and easier manufacturing due to simplification of requirements for the plane of the plates and exclusion of the adjustment process.
1 dwg
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