Optical Unit Shaking Correction via Reflection Member
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Solution Overview
Problem
Existing optical systems for camera shaking correction face challenges in minimizing apparatus size while maintaining high-quality image formation and optical performance, as methods like moving optical components or changing prism angles lead to increased size, aberration, and focusing issues.
Innovation Solution
An optical unit with a reflection member and a driver that adjusts both the reflection member and the front lens group in predefined directions, allowing for effective camera shaking correction without requiring a large image circle or optical degradation, by integrating the front and rear lens groups for coordinated movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a prism is rotated to correct shaking, then shaking correction is achieved, but the optical axis shifts and aberration increases
Solution Approach 1:
A movable reflecting member (mirror) is introduced as an intermediary between the incident light and the prism. This mirror shifts the optical axis in the opposite direction to the prism's rotation-induced shift, thereby compensating for the aberration caused by prism rotation while maintaining the shaking correction function.
Solution Approach 2:
The system dynamically changes the angle of the movable reflecting member based on the detected shaking amount. By adjusting the mirror's angle, the optical axis position is controlled to counteract the aberration caused by prism rotation, maintaining optimal optical alignment during shaking correction.
2Reliability
If lens components are moved for shaking correction, then shaking is corrected, but the apparatus size increases due to required movement space
Solution Approach 1:
The patent replaces the mechanical lens movement system with an optical system using a movable reflecting member and a bending optical axis member (prism). This substitution eliminates the need for large mechanical movement spaces while achieving the same shaking correction effect through optical path manipulation.
Solution Approach 2:
Instead of moving lens components along the optical axis (one dimension), the system uses a movable reflecting member to shift the optical axis position in a perpendicular dimension. This dimensional change allows shaking correction without requiring additional axial space for lens movement.
3Manufacturing precision
If the number of pixels is increased, then image quality is improved, but the pixel size is minimized and light amount decreases causing camera shaking
Solution Approach 1:
The patent uses a simple, lightweight movable reflecting member (mirror) instead of complex heavy mechanical lens driving mechanisms. This lightweight component can be rapidly actuated to correct shaking caused by high-resolution sensors, providing stable images without adding significant weight or complexity to the compact camera system.
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
This solution enables high-quality image formation with reduced optical degradation and apparatus size, improving camera stability and image clarity while maintaining a compact design.
Implementation Method 1
a reflection member for bending an optical axis of the optical unit
Data Source
AI summary
An optical unit for forming an object image according to the present invention includes: a reflection member for bending an optical axis of the optical unit; a front lens group arranged closer to an object side of the optical unit than the reflection member; a rear lens group arranged closer to an image forming side of the optical unit than the reflection member; and a driver for driving the optical unit. The driver drives the reflection member and the front lens group in a predefined first direction and in a predefined second direction.