Image Pickup Device Tilted Surface Alignment Mechanism
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Solution Overview
Problem
Existing image pickup devices face challenges in accurately adjusting the flange focal length and suppressing tilt of the image pickup element, leading to difficulties in achieving high-resolution image focus, particularly due to limited precision in manual adjustments and lack of mechanisms to regulate tilt effectively.
Innovation Solution
The proposed image pickup device incorporates a tilted surface section, a direction specifying section, a rotating member, and a drive section, which allows for precise alignment and movement of the image pickup element along the optical axis, reducing tilt and enabling high-accuracy adjustments through a mechanism involving a rotating ball holder and friction reduction components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment using a screw mechanism is used to adjust the image pickup element position, then the device structure is simple, but the adjustment precision is insufficient (minimum feed amount is several μm)
Solution Approach 1:
The patent replaces the manual screw mechanism with a motor-driven rotating member that contacts the tilted surface section. This substitution enables precise control of the image pickup element's movement along the optical axis through rotational motion, achieving sub-micrometer adjustment precision while eliminating the limitations of manual operation.
Solution Approach 2:
The patent changes the control parameter from manual rotation angle to motor-controlled rotation angle. By using a motor to drive the rotating member, the system can precisely control the rotation angle and consequently the movement distance of the image pickup element, achieving high precision adjustment that is not possible with manual operation.
2Ease of operation
If the image pickup element is placed on a tilted surface to enable movement, then the element can be adjusted along the optical axis, but tilt of the element cannot be suppressed
Solution Approach 1:
The patent introduces an asymmetric configuration where the rotating member contacts only a specific section of the tilted surface. This asymmetric contact point, combined with the direction specifying section, ensures that the image pickup element moves purely along the optical axis without tilting, even though the surface itself is tilted.
Solution Approach 2:
The rotating member acts as an intermediary between the tilted surface and the image pickup element. By introducing this intermediate component that rotates on the tilted surface, the system converts the tilted surface's geometric advantage into pure linear motion along the optical axis, preventing tilt while maintaining adjustability.
3Adaptability or versatility
If multiple components are used to enable movement and adjustment, then the adjustment range is increased, but the number of components affecting tilt increases
Solution Approach 1:
The patent merges multiple functions into the rotating member: it serves as both the drive interface (contacting the tilted surface) and the motion constraint (through the direction specifying section). This consolidation reduces the number of separate components that could potentially cause tilt, while maintaining full adjustment capability along the optical axis.
4Measurement precision
If a motor-driven mechanism is used for precise positioning, then adjustment precision is improved, but the device size and cost increase
Solution Approach 1:
The patent uses a simple motor-driven rotating member that provides only the minimal necessary function: driving the image pickup element along the optical axis. By avoiding complex mechanisms and using a straightforward motor-rotation-movement chain, the system achieves high precision positioning at lower cost and smaller size compared to more elaborate precision positioning systems.
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 configuration enables high-accuracy alignment and focus adjustment, allowing for precise placement of the image pickup element within the focal depth, thereby ensuring the entire image is in focus, while reducing the size and cost of the device by utilizing a motor-driven mechanism for precise positioning.
Implementation Method 1
a rotating member, which is disposed between the tilted surface section and the panel section and rotates and moves along a tilt direction of the tilted surface section by being in contact with the tilted surface section
Data Source
AI summary
An image pickup device includes a placing section on which an image pickup element that receives light from an object is placed, a tilted surface section, which is provided on the placing section and is tilted with respect to the axis of light that enters the image pickup element, a direction specifying section, which specifies a moving direction so that the placing section moves parallel to the optical axis direction, a panel section having a surface perpendicular to the optical axis, and a rotating member, which is disposed between the tilted surface section and the panel section, and rotates and moves in the tilt direction of the tilted surface by being in contact with the tilted surface section.