Attachment Optical System with Dome Cover for Water Aberration Correction
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Solution Overview
Problem
Existing attachment optical systems for cameras face challenges in maintaining optical performance when transitioning from air to water, as they struggle to effectively correct aberrations and focus sensitivity differences, leading to deteriorated autofocus performance.
Innovation Solution
An attachment optical system with a first converter optical system featuring a dome-shaped cover and a second converter optical system, which includes a front and rear converter lens, is designed to be attachable and detachable from the imaging optical system, ensuring a refractive power balance that satisfies specific inequalities to maintain focus sensitivity and correct aberrations in water while minimizing the movement of the focus lens unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a converter lens with strong refractive power is used to correct aberrations in water, then aberration correction is improved, but focus sensitivity changes significantly between air and water modes, deteriorating autofocus performance
Solution Approach 1:
The attachment optical system is divided into two separate converter optical systems: a first converter optical system attached to the object side and a second converter optical system attached to the image side. This segmentation allows independent optimization of each system's refractive power, enabling aberration correction without excessive focus sensitivity changes that would harm autofocus performance.
Solution Approach 2:
The patent carefully controls the refractive power parameters of both converter optical systems through specific conditional inequalities. By adjusting the refractive power distribution between the two systems, the patent achieves aberration correction while maintaining focus sensitivity within acceptable ranges for autofocus operation.
2Reliability
If a converter lens is attached to correct aberrations in water, then optical performance in water is improved, but the device complexity increases
Solution Approach 1:
The converter function is segmented into two separate optical systems attached at different locations (object side and image side). This segmentation allows the correction function to be distributed across multiple elements rather than requiring a single complex lens, thereby reducing the complexity of any individual component while maintaining overall optical performance.
Solution Approach 2:
The attachment optical system serves multiple functions: it corrects aberrations for water use, maintains compatibility with air use through detachability, and preserves autofocus performance through controlled refractive power distribution. This multi-functionality is achieved through a modular design that can be attached or detached as needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides optical performance in water that is close to that in air, ensuring stable autofocus and reducing the refractive power of the rear converter lens, thereby enhancing the camera's performance in aquatic environments.
Implementation Method 1
optical performance deteriorates because a refraction action at an interface between water and the imaging optical system changes
Data Source
AI summary
An attachment optical system attachable to and detachable from an imaging optical system includes a first converter optical system attachable to an object side of the imaging optical system, and a second converter optical system attachable to an image side of the imaging optical system. The first converter optical system includes a first unit consisting of a dome-shaped cover. A predetermined condition is satisfied.