Scan Engine Lens Mounting for Larger Optics and Alignment
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Solution Overview
Problem
Industrial scanners face challenges in balancing the need for larger optics to meet scanning performance requirements while being constrained by housing dimensions, leading to potential damage and reduced scanning efficiency due to mechanical forces and optical distortion.
Innovation Solution
A scan engine design that positions the imaging lens system adjacent to the chassis, allowing for larger, higher-powered optics and precise optical alignment, while utilizing the full vertical dimension of the scanner housing, and employs a chassis mounting system with precise engagement features to secure components without constraining the lens system's dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If larger optics are used to meet scanning performance requirements, then scanning capability is improved, but the overall dimensions of the housing and chassis increase
Solution Approach 1:
The patent repositions the imaging lens system from a conventional horizontal arrangement to a vertical arrangement adjacent to the chassis. This dimensional change allows the lens system to utilize the vertical space of the housing rather than horizontal space, enabling larger optics to be accommodated within the same overall housing footprint. The lens holder is positioned to extend vertically from the chassis, effectively using the third dimension (height) to resolve the space constraint.
2Measurement precision
If larger optics are used, then scanning capability is improved, but mechanical securing forces increase which could damage the chassis
Solution Approach 1:
The mounting system is divided into multiple discrete engagement features distributed around the periphery of the lens holder. Instead of using a single large mounting point that would concentrate high mechanical forces, the system employs multiple tabs and corresponding hooks spaced circumferentially. This segmentation distributes the mechanical loading across multiple contact points, reducing the force at each individual mounting location and preventing damage to the chassis while still securely holding the larger lens system.
3Area of stationary object
If compact imaging systems are used, then housing dimensions are reduced, but optical alignment precision is compromised leading to reduced scanning efficiency
Solution Approach 1:
The lens holder incorporates self-aligning features including reference positioning surfaces and precision-machined mounting interfaces that automatically guide the lens system into correct alignment during assembly. The vertical positioning adjacent to the chassis provides inherent alignment references, and the peripheral mounting tabs are designed with tolerance-compensating geometry that self-corrects minor misalignments. This self-aligning mechanism ensures high optical precision without requiring complex external alignment equipment or procedures.
4Measurement precision
If larger optics are used, then scanning capability is improved, but the complexity of the mounting system increases
Solution Approach 1:
The mounting system integrates multiple functions into a single unified structure. The lens holder combines the optical mounting function with mechanical support, alignment reference surfaces, and electrical connection interfaces in one integrated component. The peripheral tabs serve both as structural support elements and as alignment features, eliminating the need for separate alignment fixtures or additional mounting brackets. This merging of functions reduces the overall number of parts and simplifies the assembly process while accommodating the larger lens system.
Data Source
AI summary
A scan engine for capturing at least one image of an object appearing in an imaging field of view (FOV) is provided that includes an imaging system and a chassis. The imaging system includes a lens holder and at least one lens disposed within the lens holder. The lens holder includes a lens holder mounting portion. The chassis includes a chassis mounting portion adapted to couple with the lens holder mounting portion.


