FIELD: physics.
SUBSTANCE: cylindrical lenses provide a section of a pre-collimated beam at the input mirror of a Fabry-Perot interferometer, equal to the diameter of the effective region of the interferometer. A minimum beam section is provided between the mirrors at a distance half the length of the interferometer.
EFFECT: compensating for light losses caused by spherical aberrations in a system with a Fabry-Perot interferometer.
11 dwg
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