有朋友需要Design of achromatic and apochromatic plastic micro-objectives論文，所以轉(zhuǎn)化成PDF文檔，方便下載閱讀。 Tlr v={
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1. Introduction I]q% 2i e
As is well known, the first-order chromatism correc-tion of refractive optical systems within the limited choice of optical materials can be achieved by means of diffractive lenses (DL) (see [1–5], for example). One of the possible ways to achromatize or apochromatize an optical system with the chromatism above the re-quired level is shown in [6]. It implies the usage of a diffractive–refractive correction unit, consisting of a DL and one or two refractive lenses (RLs). The cor-rection unit can be assembled using both additional lenses and the optical system’s own RLs, located near the aperture stop. u ^RxD^=L
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