Cemented Lens Group Positioning via Contact Projection
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Solution Overview
Problem
Existing methods for fixing lens groups in optical systems, such as microscopes, face challenges in achieving high accuracy due to difficulties in measuring and adjusting the eccentricity of lenses, particularly when using cemented lenses, which can lead to errors in positioning and optical performance.
Innovation Solution
The solution involves adhering cemented lens groups to inner frames by causing the periphery of the cemented surface to come into contact with a contact projection on the inner frame, allowing for easier measurement and adjustment of eccentricity, and using convex surfaces for improved measurement accuracy and error prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lens closest to the image or object is selected as the first lens to be adhered to the inner frame, then the inner frame can serve as a foundation to support the lens group and the eccentricity state can be easily measured, but high adherence accuracy is required for the first lens and errors will impinge on the accuracy of subsequent lens positions
Solution Approach 1:
A contact projection is introduced as an intermediary element between the inner frame and the first lens. The contact projection serves as a precise positioning feature that mediates the adherence process, enabling accurate positioning of the first lens relative to the inner frame while facilitating easy measurement of eccentricity state.
2Stability of the object's composition
If cemented lens groups are assembled by adhering lenses in an accumulating manner, then the inner frame works as a foundation to support the lens group, but errors in the initial lens adherence impinge on the accuracy of the entire optical system
Solution Approach 1:
The contact projection is prepared in advance on the inner frame as a preliminary positioning feature. This preliminary action establishes a precise reference point before the lens adherence process begins, ensuring that the first lens is positioned accurately from the start, thereby preventing error propagation through the accumulating assembly process.
3Measurement precision
If the periphery of the cemented surface is used as the contact portion with the contact projection, then measurement and adjustment of eccentricity becomes easier, but the structure becomes more complex
Solution Approach 1:
The contact projection is designed with specific local geometric features that concentrate the contact area at a precise location on the periphery of the cemented surface. This local quality enhancement enables accurate eccentricity measurement and adjustment without requiring complex overall structural modifications to the lens group.
Data Source
AI summary
A construction of an objective is configured which includes a plurality of lens groups including at least one cemented lens group; a plurality of inner frames to hold the lens groups, each including a contact projection; and a tube to hold the plurality of inner frames stacked inside. At least one cemented lens group is secured to the inner frames by causing the periphery of a cemented surface between cemented lenses to come into contact with the contact projection.