FIELD: physics.
SUBSTANCE: first is single positive lens. Second is negative meniscus with concavity facing the object and made up of negative and positive lenses glued together. Third is positive meniscus with its concavity facing the object. Fourth is positive made up of two single lenses, first being lenticular lens and second being positive meniscus with its concavity facing the image. Fifth is negative meniscus with its concavity facing the image and being made up of lenticular lens and biconcave lens.
EFFECT: increased distance from input pupil to first surface of lens and better quality of image.
2 cl, 2 dwg, 1 tbl
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