Transparent Part Code Scanning via Projected Image Contrast
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Solution Overview
Problem
Transparent parts such as glass or quartz lack sufficient reflectivity and contrast for two-dimensional codes to be read by conventional scanners.
Innovation Solution
A method and system are provided to illuminate the code on a transparent part, projecting the image onto a non-transparent projection surface, allowing a scanner to read the projected image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional scanners are used to scan codes on transparent parts, then the scanning process is simple, but the code cannot be read due to insufficient reflectivity and contrast
Solution Approach 1:
A projection surface is introduced as an intermediary between the transparent part and the scanner. The projection surface receives the projected code image and provides sufficient contrast for the scanner to read the code, resolving the issue of insufficient reflectivity on transparent parts without requiring complex modifications to the scanner itself
Solution Approach 2:
The code scanning is shifted from the transparent part surface (2D plane) to a projection surface (separate 2D plane). By projecting the code onto another surface, the system creates a new dimension for the scanning process, allowing the scanner to read the code through the projected image rather than directly from the transparent part
2Measurement precision
If direct scanning of codes on transparent parts is attempted, then the system remains simple, but sufficient contrast is not achieved for reliable reading
Solution Approach 1:
Instead of scanning the code directly on the transparent part, the system creates a projected copy of the code on a separate projection surface. This copy has sufficient contrast for accurate scanning, while the original code remains on the transparent part. The projection surface acts as a mediator that provides the necessary contrast for measurement precision
3Adaptability or versatility
If transparent parts are used, then material properties are maintained, but code visibility and scanability are reduced
Solution Approach 1:
The projection surface serves as a mediator that bridges the gap between the transparent part and the scanner. It receives the projected code image and provides the necessary contrast for detection, allowing transparent parts to maintain their material properties while enabling reliable code scanning through the intermediary projection surface
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
Enables successful scanning and decoding of codes on transparent parts by generating a projected image with sufficient contrast, overcoming scanning difficulties with direct scanning.
Implementation Method 1
illuminating the code to generate a projected image of the code on a projection surface
Data Source
AI summary
Methods and apparatus for scanning a code on or in a transparent part, the method comprising: illuminating the code to generate a projected image of the code on a projection surface spaced from the transparent part; and machine scanning the projected image.