| 摘要 |
<p>ACHROMATIC APLANATIC CONDENSER An Achromatic Aplanatic Condenser having a numerical aperture of 1.30 has 3 components, a double convex doublet as the first component, a miniscus lens as the second component and a convex plano doublet as the third component all being aligned along an optical axis and having a front pupil plane external to said condenser. The condenser is well corrected for spherical and chromatic abberations and capable of uniformly filling a field of about 2.4mm in diameter.</p> |
