Objective lens assembly for a portable missile launcher.

摘要

A portable missile launcher has an optical system with a single lens (22) for receiving visible and near infrared light energy from a target directing it to a prism (24) where the light is split into a part transmitted to an eyepiece (28) and a further part (30) to infrared tracking equipment (18). The objective lens (22) is a doublet having a front lens and a rear lens which cooperate to provide sufficiently small chromatic aberration to enable image quality correction for both visual examination and near infrared tracking. <IMAGE>