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34. (US20180275381) ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME

المكتب : الولايات المتحدة الأمريكية
رقم الطلب: 15717804 تاريخ الطلب: 27.09.2017
رقم النشر: 20180275381 تاريخ النشر: 27.09.2018
نوع النشر: A1
التصنيف الدولي للبراءات:
G02B 15/163
G02B 27/64
Description not available in lang arDescription not available in lang ar
CPC:
G02B 15/163
G02B 27/646
المتقدمون: OLYMPUS CORPORATION
المخترعون: Kazuteru KAWAMURA
بيانات الأولوية:
العنوان: (EN) ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME
الملخص: front page image
(EN)

A zoom lens includes in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a rear-side lens unit, and an aperture stop. The second lens unit includes a first sub-unit having a negative refractive power and a second sub-unit having a negative refractive power, and the rear-side lens unit includes a third lens unit having a positive refractive power which is disposed nearest to object. The first lens unit includes at least a negative lens and a positive lens and the first sub-unit includes at least a negative lens and a positive lens. The third lens unit includes at least two lens components having a positive refractive power, and the following conditional expressions (1) and (2) are satisfied:


61≤νd1G_max_p  (1), and


−0.03≤Tp2Ga_min_p≤0.0165  (2).