Indicia Readers Using Dichroic Mirrors for 2D and 3D Imaging
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Solution Overview
Problem
The challenge lies in effectively packaging two-dimensional (2D) and three-dimensional (3D) imaging assemblies within indicia readers to enhance their functional features, as current implementations face difficulties in integrating these assemblies efficiently.
Innovation Solution
The use of dichroic mirrors within the optical paths of the imaging assemblies allows for the separation and redirection of light in different wavelength ranges, enabling the simultaneous operation of 2D and 3D imaging capabilities by reflecting one wavelength range and passing another, thereby facilitating the generation of respective image data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple imaging assemblies (2D and 3D) are integrated into a single indicia reader, then the functional features and versatility of the device are enhanced, but the device complexity and packaging difficulty increase
Solution Approach 1:
The patent combines multiple imaging assemblies (2D and 3D) into a single integrated indicia reader device, merging their functions to provide enhanced versatility for scanning different types of codes and performing both 2D recognition and 3D depth mapping operations within one device
Solution Approach 2:
The integrated reader is designed to perform multiple functions simultaneously - 2D barcode scanning, 2D image capture, 3D depth mapping, and volumetric scanning - making it a universal device that can handle diverse scanning requirements across different industries and applications
2Productivity
If dichroic mirrors are used to separate and redirect light for multiple imaging assemblies, then simultaneous operation of 2D and 3D imaging is enabled, but the optical path complexity increases
Solution Approach 1:
The patent introduces dichroic mirrors as intermediary optical elements that mediate between the light source and multiple imaging assemblies. These mirrors separate light based on wavelength, directing different spectral components to different sensors, thereby enabling simultaneous operation of multiple imaging functions
Solution Approach 2:
The optical path is segmented into different wavelength channels using dichroic mirrors, with each channel directed to a specific imaging assembly. This segmentation allows independent optimization of each imaging path while maintaining simultaneous operation
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 enhances the versatility and accuracy of indicia readers by allowing the simultaneous capture and processing of 2D and 3D image data, improving item identification and verification processes, and reducing complexity in operations.
Implementation Method 1
a dichroic mirror configured to reflect light in a first wavelength range and to pass therethrough light in a second wavelength range, the first wavelength range being different from the second wavelength range
Implementation Method 2
a mirror arrangement configured to redirect light from a product scanning region of the indicia reader to the first imaging assembly
Data Source
AI summary
Indicia readers with multiple imaging assemblies and dichroic mirrors are disclosed herein. In an example, an indicia reader like a barcode reader includes a first (2D) imaging assembly operable to sense light in the 700 nm or below wavelength range, a second (3D) imaging assembly operable to sense light in the above 700 nm wavelength range, and a dichroic mirror. The mirror is situated such that (i) light that is received by the first imaging assembly is received from a product scanning region and is reflected by the mirror such that its path is redirected towards and the first imaging assembly and (ii) light that is received by the second imaging assembly is received from the product scanning region by passing through the mirror toward the second imaging assembly.