Stage Glass Flatness Adjustment for Vision Measuring Apparatus
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Solution Overview
Problem
Large stage glasses used in vision measuring apparatuses deflect due to their weight, leading to measurement inaccuracies and the need for additional support mechanisms that obstruct illumination, making it difficult to precisely measure large objects like display panels.
Innovation Solution
A stage apparatus with a light transmittance plate having a plane light emitter on its lower surface for uniform contour illumination and a flatness adjuster that supports the plate at multiple points to maintain flatness, eliminating the need for a movement mechanism and allowing for larger sizes without rigidity and thickness constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the stage glass is made larger to accommodate bigger objects, then the measurement area is improved, but flexure due to weight increases
Solution Approach 1:
The stage glass is divided into multiple segments that can be independently adjusted. Each segment is supported by adjustable supports that can be positioned at different heights, allowing the stage surface to be segmented into controllable zones that maintain flatness despite the overall large size of the stage glass.
Solution Approach 2:
The stage glass transitions from a static structure to a dynamic one with adjustable supports. The supports can be moved and adjusted in height to compensate for flexure, allowing the stage surface to adapt and maintain flatness dynamically despite the weight and size of the stage glass.
2Measurement precision
If additional support mechanisms are added to maintain flatness, then measurement precision is improved, but the illumination area is reduced
Solution Approach 1:
Adjustable supports act as intermediary elements between the stage glass and the base structure. These supports serve as mediators that provide the necessary support to maintain flatness without directly obstructing the illumination path, as they can be positioned and adjusted to minimize interference with the lighting area.
Solution Approach 2:
The supports are designed to be movable and adjustable rather than fixed, allowing them to be dynamically repositioned. This dynamic capability enables the supports to be moved out of the way during illumination or adjusted to optimal positions that maintain flatness while minimizing obstruction to the illumination area.
3Strength
If the stage glass thickness is increased to reduce flexure, then structural strength is improved, but weight increases
Solution Approach 1:
The adjustable supports function as counterbalancing elements that compensate for the weight-induced flexure of the stage glass. By providing upward support forces at strategic locations, the supports counteract the downward gravitational force on the stage glass, effectively neutralizing the weight problem without increasing the glass thickness.
Solution Approach 2:
The stage glass is segmented into multiple zones with independent supports, allowing the structure to distribute the weight load across multiple points rather than relying on increased thickness. This segmentation enables the glass to be thinner while maintaining rigidity through the distributed support system.
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 maintains the flatness of the stage surface, improves measurement accuracy, reduces component and assembly costs, and allows for efficient contour illumination of large objects, while minimizing power consumption and heat generation.
Implementation Method 1
a plane light emitter having a flat plane provided to substantially all over a lower surface of the light transmittance plate to illuminate the workpiece with contour illumination through the light transmittance plate
Data Source
AI summary
A stage apparatus (100) includes a stage glass (210) having on an upper surface a stage surface (211) of a substantially flat plane on which a predetermined workpiece (W) is set, a plane light emitter (220) with a flat plane, which is provided to substantially all over a lower surface of the stage glass (210) and illuminates the workpiece (W) with contour illumination through the stage glass (210), and a supporting section (300), which supports at plurality of points on a lower face side of the plane light emitter (220) and adjusts the flatness of the stage surface (211) by adjusting the height at a plurality of supporting points.