Abstract
The stray radiation suppression in Cassegrain family optical system is
presented. The design method for ultra-short outer baffle with honeycomb structure
is proposed. Meanwhile the constraint formulas for designing the geometries of
primary baffle and secondary baffle are deduced when basing the characteristic and
taking vignette into account. According to the ray trace simulated data, the point
source transmittance values of the baffle are less than 10-10 when incident angles
are larger than the rejection angle. The honeycomb-look front baffle guarantees a
comparable performance of stray light suppression with traditional tube baffle,
while reducing the size greatly.
© 2014 Chinese Optics Letters
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