Schmidt lens

Schmidt lens

[′shmit ‚lenz]
References in periodicals archive ?
A complex-shaped, thin-glass Schmidt lens in front seals the tube from dust and corrects for inherent optical defects in the mirror system.
A variant of the classical Newtonian is the Schmidt-Newtonian, which contains a Schmidt lens that acts as a corrector for the main mirror, a support for the secondary, and a seal for the tube.