Zoom lens and imaging device

JP2026020012A5Pending Publication Date: 2026-06-08CANON KK
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
CANON KK
Filing Date
2025-04-22
Publication Date
2026-06-08

AI Technical Summary

Technical Problem

Existing zoom lenses face challenges in reducing the load on actuators due to the size and weight of the lens groups that need to be driven during zooming, which affects the speed and quietness of the zoom operation.

Method used

A zoom lens design with a first lens group having negative refractive power, an intermediate group with overall positive refractive power, and a subsequent group with overall negative refractive power, where the first lens group remains stationary during zooming, and the intermediate lens groups move to change the spacing between adjacent lens groups, optimizing the movement amounts and focal lengths to reduce the load on the actuator.

Benefits of technology

This design achieves fast and quiet zooming with reduced size and weight of the lens groups, effectively correcting aberrations and reducing the drive load on the actuator, enabling efficient image capture.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 00000000_0000_ABST
    Figure 00000000_0000_ABST
Patent Text Reader

Abstract

There is a demand for smaller and lighter lens groups to be driven in zoom lenses. [Solution] A zoom lens L0 has a negative first lens group, a positive intermediate lens group, and a negative trailing lens group, with the intermediate lens group having positive first and second intermediate lens groups. During zooming, the first lens group remains stationary, while the first and second intermediate lens groups move. The first lens group includes two or more lenses. The movement amounts of the first and second intermediate lens groups during zooming from the wide-angle end to the telephoto end are denoted by mp1 and mp2, the focal lengths of the first and second intermediate lens groups by fp1 and fp2, the focal lengths of the zoom lens at the wide-angle end and the telephoto end by fw and ft, and the sum of the distance from the lens surface closest to the object to the lens surface closest to the image and the distance from the lens surface closest to the image to the image plane at the wide-angle end is denoted by TTLw. Satisfy the following: 0.10≦│mp2 / mp1│≦0.82, 1.23≦fp2 / fp1≦10.00, 1.50≦ft / fw≦6.00, 0.10≦TTLw / fw≦10.00.
Need to check novelty before this filing date? Find Prior Art