Document Holder for Portable Imaging Apparatus
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Solution Overview
Problem
Portable imaging devices struggle to consistently capture images of documents with similar scaling, skewing, panning, and background parameters due to user-handled operation, leading to variability in imaging conditions.
Innovation Solution
A detachable document-holding device with a document-tray and sliding interface, pivotally attached to a portable imaging apparatus, allowing for adjustable positioning to maintain a fixed optical distance between the document and the camera lens, ensuring consistent imaging parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a user holds the portable imaging apparatus by hand to capture document images, then the apparatus is portable and easy to operate, but the imaging conditions become highly non-repeatable with variability in scaling, skewing, panning, and background parameters
Solution Approach 1:
The patent introduces a document holder as an intermediary device between the document and the camera. The holder includes a tray to hold the document and a positioning mechanism with sliding and pivoting components that mediate the spatial relationship between the document and camera lens, ensuring consistent imaging parameters while maintaining portability
Solution Approach 2:
The document holder employs dynamic components including a sliding panel that can move along rails and a pivoting mechanism with shafts that allow angular adjustment. These dynamic elements enable the system to adapt to different document sizes and camera positions while maintaining consistent optical distance and orientation
2Ease of operation
If the document is placed at varying distances from the camera lens, then the device is easy to operate, but the scaling and focus of the captured images vary
Solution Approach 1:
The document holder pre-configures the optical distance between the document and camera lens through its mechanical structure. The tray positioning mechanism and pivoting shafts are designed to maintain a predetermined optimal distance, eliminating the need for manual adjustment and ensuring consistent scaling across different captures
3Adaptability or versatility
If the document-tray is positioned at varying angles relative to the camera optical axis, then the device is flexible to operate, but skewing and distortion increase in the captured images
Solution Approach 1:
The pivoting mechanism with shafts connects the document tray to the base, allowing controlled angular adjustment. This dynamic connection enables the tray to be positioned at different angles while maintaining perpendicular alignment with the optical axis during capture, providing flexibility without introducing skewing or distortion
Solution Approach 2:
The mechanical design ensures that the document tray maintains a consistent perpendicular relationship with the camera optical axis through its pivoting mechanism. This creates an equipotential state where the optical geometry remains optimal regardless of the tray's position along the sliding rails
Data Source
AI summary
A detachable document-holding device for holding a document at a substantially fixated distance from a lens disposed at a back surface of a portable imaging apparatus. The document-holding device includes a document tray, a sliding interface having a hollow passage, and a mounting-structure and a base. The mounting-structure includes a sliding panel pivotally attached to an attachment panel. The tray and the sliding interface are pivotally interconnected. The base is securely attached to the back surface of the portable imaging apparatus, wherein the mounting-structure is operatively mounted onto the base. The hollow passage fittingly accommodates the sliding panel, facilitating a user to set the distance between the document and the lens. When in operational state, the tray is substantially perpendicular to the optical axis of the lens, wherein an image of the document, placed onto the tray, is reflected towards the lens.