Integrated Lens Barrel Holding for Precise Stereoscopic Alignment
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Solution Overview
Problem
Existing stereoscopic imaging systems face issues due to manufacturing errors causing differences in image quality between left and right eye images, leading to viewer fatigue and difficulty in image fusion, and are constrained by lens barrel thickness for improved optical performance.
Innovation Solution
A lens barrel design with integrated holding members for left and right optical systems, allowing for optical adjustments to correct positional deviations and improve alignment, using eccentric rollers and stepping motors for precise lens positioning and focusing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate holding members are used for left and right lens barrels, then manufacturing and assembly are simpler, but positional deviations between lens units and image pickup element increase due to cumulative errors
Solution Approach 1:
The patent combines the holding members for the left and right lens barrels into a single integrated holding member. This integrated structure holds both lens units simultaneously, eliminating cumulative positioning errors that would occur with separate holding members. The integration ensures that both optical systems share a common reference frame, thereby improving manufacturing precision and reducing positional deviations between lens units and the image pickup element.
2Manufacturing precision
If lens diameter is increased to improve optical performance, then image quality improves, but lens barrel thickness increases which is constrained by the base length of left and right eyes
Solution Approach 1:
By integrating the holding members into a single structure, the patent enables a more compact lens barrel design. The integrated holding member allows the lens units to be positioned closer together, reducing the overall thickness of the lens barrel. This resolution allows for larger lens diameters to be accommodated without proportionally increasing the barrel thickness, thereby improving optical performance while maintaining constraints on the base length for stereoscopic imaging.
3Reliability
If separate lens barrels are used for left and right eyes, then focusing control is independent for each eye, but differences in relative position between lens units and image pickup element cause image quality differences and viewer fatigue
Solution Approach 1:
The integrated holding member ensures that both lens units are positioned with high precision relative to the image pickup element, eliminating positional deviations that cause image quality differences. This improves image fusion quality and reduces viewer fatigue. At the same time, the patent maintains independent focusing control mechanisms for each optical system, allowing separate focusing adjustment while benefiting from the improved positional accuracy provided by the integrated holding structure.
Data Source
AI summary
A lens barrel having a first optical system and a second optical system which are arranged in parallel with respect to an image pickup element and guide light to the image pickup element, includes: an integrated holding member integrally formed to hold an 11 lens unit included in the first optical system and a 21 lens unit included in the second optical system and corresponding to the 11 lens unit; a first holding member which holds a 12 lens unit included in the first optical system; a second holding member that holds a 22 lens unit included in the second optical system and corresponding to the 12 lens unit; and a base lens barrel to which the integrated holding member, the first holding member and the second holding member are fixed.