Zoom lens and imaging device

The zoom lens design with specific lens group movements and spacings addresses the challenge of achieving a wide angle, high zoom ratio, and high optical performance by minimizing distortion and maintaining a compact size.

JP2026106914APending Publication Date: 2026-06-30CANON KK
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
CANON KK
Filing Date
2024-12-18
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing zoom lenses struggle to achieve a wide angle of view, high zoom ratio, and high optical performance while maintaining a compact size, as they often experience significant distortion and optical performance fluctuations during zooming.

Method used

A zoom lens design comprising a first lens group with positive refractive power that does not move, a V group with negative refractive power moving towards the image side, and an N group with positive refractive power moving towards the object side, with changing distances between adjacent lens groups, adhering to specific focal length and magnification ratios.

Benefits of technology

The design achieves a wide angle of view, high zoom ratio, and high optical performance across the entire zoom range, minimizing distortion and maintaining a compact size by optimizing lens group movements and spacings.

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Abstract

It provides a zoom lens with a wide angle of view, high zoom ratio, compact size, and high optical performance across the entire zoom range. [Solution] The lens comprises, in order from the object side to the image side, a first lens group with positive refractive power that does not move for zooming, a V group consisting of one or more lens groups that move toward the image side when zooming from the wide-angle end to the telephoto end and have a negative refractive power as a whole, a N group consisting of three or more lens groups that move toward the object side when zooming from the wide-angle end to the telephoto end and have a positive refractive power as a whole, and a final lens group that does not move for zooming, and is characterized by appropriately setting the focal length of the first lens group and the focal length at the telephoto end.
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