Lens Barrel Holding Structure for Precise Optical Element Adjustment
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Solution Overview
Problem
Existing methods for adjusting the position of optical elements in lenses, such as those used in projection and measurement optical systems, often result in unintended uplift or inclination of the holding units, leading to inaccurate positioning.
Innovation Solution
A holding apparatus with inclined surfaces on the holding units and through-holes for adjustment units that apply forces orthogonal to the optical axis, combined with a retainer collar for fixation, reduces the likelihood of uplift and inclination during position adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a force is applied to a holding unit that holds an optical element using a tool, then the position of the optical element can be adjusted, but the holding unit may be uplifted or inclined
Solution Approach 1:
The patent combines multiple holding units (first holding unit and second holding unit) into a stacked configuration within a single lens barrel assembly. This merging of holding units provides mutual support and stabilization, preventing uplift and inclination when adjustment forces are applied to individual units. The stacked configuration ensures that adjusting one optical element does not cause unintended position changes in other held elements.
Solution Approach 2:
The patent introduces a vertical stacking dimension by placing the first and second holding units at different heights within the lens barrel. This three-dimensional arrangement allows independent adjustment of each optical element along the optical axis while maintaining lateral stability through the stacked configuration, effectively separating position adjustment in one dimension from stability in other dimensions.
2Ease of operation
If the position of an optical element is adjusted by applying force to the holding unit, then the optical element position can be changed, but unintended position changes occur in the holding unit
Solution Approach 1:
The patent segments the holding system into distinct first and second holding units, each capable of independent position adjustment. This segmentation allows individual optical elements to be adjusted without affecting others, enabling precise control of each element's position while maintaining overall system accuracy through isolated adjustment mechanisms.
Solution Approach 2:
The patent implements dynamic adjustability by allowing the holding units to be positioned at different locations along the optical axis while maintaining stability. The system transitions from a fixed configuration to a dynamically adjustable one, where each holding unit can be independently repositioned and then stabilized, enabling flexible optimization of optical performance without sacrificing precision.
Data Source
AI summary
In a holding apparatus, a first holding unit has a first surface at a position facing a lens barrel, the first surface being inclined with respect to an optical axis of a first optical element, a second holding unit has a second surface at a position facing the lens barrel, the second surface being inclined with respect to an optical axis of a second optical element, and the lens barrel includes a first through-hole that is provided at a position corresponding to the first surface and extends in a first direction orthogonal to the optical axis of the first optical element, and a second through-hole that is provided at a position corresponding to the second surface and extends in a second direction orthogonal to the optical axis of the second optical element.