OPTICAL SYSTEM AND APPARATUS INCLUDING OPTICAL SYSTEM
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United States of America
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Issued Date -
Dec 5, 2024
app pub date -
May 31, 2024
filing date -
May 31, 2024
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Abstract
An optical system includes six or less lenses, wherein the six or less lenses include a plurality of positive lenses, and a final lens having negative refractive power and disposed closest to an image, and wherein, where a total optical length obtained by addition of a back focus to a distance from a lens surface closest to an object in the optical system to a final lens surface is TL, a half angle of view is ω[°], a focal length of a whole system is f, and an average value of a refractive index of a lens having a highest refractive index and a refractive index of a lens having a second highest refractive index among the plurality of positive lenses is np12ave, following conditions are satisfied: 0.50
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