anaplat
anaplat
A lens that corrects spherical and coma aberrations. A telescope and an optical microscope are equipped with an achromatic (chromatic aberration corrected) "anaplat." The anaplat is accomplished in the following way. The surface at the object side of the lens is finished in a spherical shape to eliminate the spherical aberration. The surface at the image side of the lens is fabricated to suppress the occurrence of the coma aberration (surface satisfying the sine condition).
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