ZOOM LENS AND IMAGE PICKUP DEVICE

ZOOM LENS AND IMAGE PICKUP DEVICE

PROBLEM TO BE SOLVED: To provide a zoom lens and an image pickup device reduced in size, enhanced in performance and improved in mass productivity. SOLUTION: The zoom lens is formed of three lens groups having negative, positive and positive power. The first lens group is formed of a first lens L1 t...

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Hauptverfasser: KANAI MASAMITSU, HOSOI MASAHARU
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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creator KANAI MASAMITSU
HOSOI MASAHARU
description PROBLEM TO BE SOLVED: To provide a zoom lens and an image pickup device reduced in size, enhanced in performance and improved in mass productivity. SOLUTION: The zoom lens is formed of three lens groups having negative, positive and positive power. The first lens group is formed of a first lens L1 that is a negative lens, a second lens L2 that is a negative lens, and a third lens L3 that is a positive lens. The second lens group has a cemented lens formed by joining a positive lens of a biconvex shape and a negative lens of a biconcave shape, and is formed of four lenses, and the zoom lens is formed so as to satisfy a following conditional expression (1) and a following conditional expression (2). The conditional expression (1): 0.2
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
title ZOOM LENS AND IMAGE PICKUP DEVICE
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