Imaging optical system, imaging device, and camera system

The described imaging optical system addresses aberration correction by stabilizing the first and third lens groups and moving the second lens group's negative power element, achieving high-performance and compact imaging systems with improved image quality.

JP7863777B2Active Publication Date: 2026-05-22PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Patent Information

Authority / Receiving Office
JP Β· JP
Patent Type
Patents
Current Assignee / Owner
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Filing Date
2022-03-24
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Existing imaging optical systems struggle to effectively correct various aberrations, which affect image quality.

Method used

The proposed imaging optical system consists of a first lens group with positive power, a second lens group with negative power, and a third lens group with power, where the first and third lens groups remain stationary during focusing, and at least one negative power lens element in the second lens group moves along the optical axis to adjust the distances between lens groups, incorporating specific lens configurations and aspherical surfaces to correct aberrations.

Benefits of technology

This configuration allows for effective aberration correction, enabling high-performance and miniaturized imaging systems with improved image quality, even with brighter F-numbers.

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Patent Text Reader

Abstract

To provide an image capturing optical system capable of correcting well for aberrations, an image capturing device, and a camera system.SOLUTION: An image capturing optical system is provided, comprising a first lens group having positive refractive power, a second lens group, and a third lens group. The first lens group comprises a sub lens group G1A, an aperture stop, and a sub lens group G1B. The sub lens group G1A comprises a lens element L1A1 and a lens element L1A2. The lens element L1A1 has an object-side surface that is convex toward the object side. The third lens group comprises a lens element L3E having negative power and a lens element L3P located next to the lens element L3E on the object side.SELECTED DRAWING: Figure 1
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Citation Information

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