Moveable Mirror Optical Chains for Compact Camera Modules
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Solution Overview
Problem
Conventional camera systems are bulky and heavy due to the use of large lenses that extend significantly from the front, necessitating a need for thinner, more compact designs that allow for flexible arrangement of camera modules within the device.
Innovation Solution
The implementation of moveable mirror assemblies with linear actuators and hall sensors to control the angular position of mirrors, combined with recessed mounting boards, enables the use of multiple optical chains within a camera device, allowing for a thinner profile while maintaining rigidity and flexibility in module arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large lens is used to achieve good image capture capabilities, then image quality is improved, but the camera device becomes bulky and thick
Solution Approach 1:
The patent introduces moveable mirrors that redirect light paths from a compact lens to the image sensor, effectively changing the optical path from a straight linear dimension to a multi-dimensional reflected path. This allows the lens to remain close to the sensor while still achieving the optical equivalent of a longer focal length, thus improving image capture capability without increasing device thickness.
Solution Approach 2:
The moveable mirror acts as an intermediary element between the compact lens and the image sensor. By positioning the mirror at specific angles and using it to redirect light, the system achieves the optical performance of a longer lens while maintaining a compact physical structure. The mirror serves as the mediating component that enables this transformation.
2Reliability
If multiple camera modules are included in a single device, then image processing capabilities are enhanced, but device complexity increases
Solution Approach 1:
The patent employs moveable mirrors to redirect optical paths from multiple camera modules in three-dimensional space onto a single image sensor. This allows multiple modules to be arranged in compact configurations without requiring separate dedicated spaces for each module, thereby enhancing image processing capability while controlling device complexity through efficient spatial utilization.
Solution Approach 2:
The moveable mirror mechanism serves multiple functions: it redirects light from different camera modules, enables flexible module arrangement, and allows a single image sensor to receive optical input from multiple sources. This multi-functionality reduces the need for separate dedicated optical paths for each module, thus enhancing capabilities while managing complexity.
3Stability of the object's composition
If a rigid mounting board is used to secure camera modules, then structural stability is improved, but device thickness increases
Solution Approach 1:
The patent incorporates recesses in the rigid mounting board to accommodate moveable mirrors and their support structures. By nesting these components within recesses rather than requiring additional external space, the system maintains structural rigidity while minimizing overall device thickness. The mounting board integrates multiple functions within its structure, reducing the need for additional thickness.
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 allows for a compact camera design that can incorporate multiple optical chains, enhancing image capture capabilities and reducing the overall thickness of the device without compromising rigidity, enabling more efficient use of space and improved image processing.
Implementation Method 1
a hall sensor and magnet are used to detect the position of the mirror relative to the linear actuator or other fixed element in the camera
Implementation Method 2
a linear actuator is used to drive the mirror
Implementation Method 3
A spring is used to maintain tension between the rod and a mirror support cradle
Data Source
AI summary
Methods and apparatus for implementing optical chains, e.g., camera modules, which can be used in a camera device are described as well as camera devices including multiple camera modules. In various embodiments one or more camera modules include mirror assemblies which support a movable mirror. The mirror is driven in some embodiments by a linear actuator, e.g., piezo electric actuator with the linear motion of the actuator's push rod being converted into angular mirror rotation by use of hinge, e.g., pivot on which the mirror is mounted. A return spring provide a force contrary to that provided by the actuator. A recess is included in a mounting board to allow the bottom of the mirror or a portion of the mirror mounting hinge to be placed below the surface of the mounting board to which the camera module is secured.