Optical system and imaging device having the same

JP2026013481A5Pending Publication Date: 2026-06-19CANON KK
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
CANON KK
Filing Date
2024-07-17
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing optical systems face challenges in correcting chromatic aberration of magnification between the g-line and the F-line, and suppressing various aberrations due to the small partial dispersion ratio of negative lenses and limited positive lenses on the image side, making it difficult to achieve high optical performance and compact size.

Method used

The optical system is designed with a negative lens having specific refractive index and Abbe number ranges, and includes two or more positive lenses in the rear group, satisfying conditional expressions to correct aberrations, ensuring a wide-angle and compact configuration.

Benefits of technology

The system achieves high optical performance with a wide angle of view, compact size, and effective aberration correction, including chromatic aberration, by adhering to refractive index and Abbe number conditions.

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Abstract

To provide a wide-angle, compact optical system having high optical performance. The optical system comprises a front group, an aperture stop, and a rear group, arranged in this order from the object side to the image side, the front group having a negative lens LN and satisfying a predetermined condition.
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