Visible light-near infrared wide band lens and compound seeker

Abstract

The utility model relates to a kind of visible light-near infrared wide wave band lens and the composite seeker configured with the lens, the lens includes diaphragm, first lens unit, second lens unit, third lens unit and fourth lens unit sequentially arranged from object side to image side, first lens unit has positive focal power, second lens unit has negative focal power, third lens unit has positive focal power, and fourth lens unit has negative focal power.In the utility model, through the lens unit combination of positive-negative-positive-negative focal power alternately distribution, the spherical aberration, coma, chromatic aberration and other aberrations in wide wave band range can be effectively corrected, and the imaging quality is improved;Diaphragm can limit lens light quantity, and the front design of diaphragm is conducive to the miniaturization design of lens size, so that the above-mentioned lens can be better used in common-caliber composite seeker, and smaller volume makes it less affect other modes of other composite seekers, so that composite seeker can better realize miniaturization design.

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