Digital Loupe Stereo Camera Parallax Correction
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Solution Overview
Problem
Digital loupes face challenges such as diplopia, limited working distance flexibility, and the integration of advanced optical imaging modalities due to mechanical inaccuracies, bulkiness, and ergonomic discomfort, particularly in high-magnification scenarios.
Innovation Solution
A digital loupe system incorporating a stereo camera pair with a depth sensing element and a processor that adjusts image convergence and illumination based on distance measurements, allowing for precise alignment and integration of multiple optical imaging modalities while maintaining ergonomic comfort and peripheral vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-magnification binocular systems are used, then magnification capability is improved, but diplopia and image misalignment occur due to improper alignment of optical axes
Solution Approach 1:
The patent replaces mechanical alignment adjustment with electronic image transformation. A processor electronically transforms images from a stereo camera pair to correct misalignment and convergence issues, eliminating the need for precise mechanical alignment of optical axes while maintaining high magnification capability
Solution Approach 2:
The system incorporates a distance sensor that provides feedback about the distance to the subject. This distance information is used by the processor to dynamically adjust image transformation parameters, ensuring proper alignment and convergence at varying working distances, thereby preventing diplopia
2Ease of operation
If traditional analog loupes are used, then simplicity and ergonomics are maintained, but working distance flexibility and movement freedom are limited
Solution Approach 1:
The system transitions from fixed optical parameters to dynamic adjustment. The processor dynamically transforms images based on real-time distance sensor measurements, enabling flexible working distances and freedom of movement while maintaining ergonomic comfort through electronic rather than mechanical adjustment
Solution Approach 2:
Mechanical adjustment mechanisms are replaced with electronic image transformation. The system uses a processor to electronically adjust magnification and convergence based on distance measurements, providing working distance flexibility without mechanical complexity
3Reliability
If surgical microscopes are used, then stable high-magnification viewing is achieved, but freedom of movement and working distance flexibility are restricted
Solution Approach 1:
The patent replaces the rigid mechanical microscope structure with a flexible digital system. A processor electronically stabilizes and transforms images from a handheld stereo camera pair, providing microscope-quality stability with the movement freedom of a portable device
Solution Approach 2:
The system creates a digital copy of the optical microscope function through image processing. Rather than using physical optics to achieve stability, the processor electronically stabilizes and transforms camera images, replicating microscope functionality with greater flexibility
4Adaptability or versatility
If advanced optical imaging modalities are integrated, then imaging capability is enhanced, but device bulkiness and complexity increase
Solution Approach 1:
The system uses a universal digital processing platform that can handle multiple imaging modalities. The processor transforms and processes images from various optical modalities (visible light, infrared, fluorescence) using the same software algorithms, eliminating the need for separate processing systems for each modality
Solution Approach 2:
Complex optical alignment mechanisms are replaced with software-based image transformation. The processor electronically aligns and integrates images from multiple imaging modalities, reducing mechanical complexity while enhancing imaging capability
5Measurement precision
If image sensors and displays are integrated into digital loupes, then digital magnification and processing capabilities are improved, but weight and ergonomic discomfort increase
Solution Approach 1:
The system uses a lightweight camera to capture optical images, replacing heavy traditional loupe optics. The camera creates a digital copy of the visual scene, which is then processed and displayed, eliminating the need for heavy glass lenses and optical components
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
The system provides stable, high-quality magnification with flexible working distances, concurrent direct and augmented vision, and the ability to incorporate advanced imaging modalities without compromising spatial or temporal resolution, enhancing surgical precision and comfort.
Implementation Method 1
a depth sensing element that has a sensing direction which nominally bisects the lines of sight or optical axes of the cameras of the stereo pair
Data Source
AI summary
A digital loupe system is provided which can include a number of features. In one embodiment, the digital loupe system can include a stereo camera pair and a distance sensor. The system can further include a processor configured to perform a transformation to image signals from the stereo camera pair based on a distance measurement from the distance sensor and from camera calibration information. In some examples, the system can use the depth information and the calibration information to correct for parallax between the cameras to provide a multi-channel image. Ergonomic head mounting systems are also provided. In some implementations, the head mounting systems can be configurable to support the weight of a digital loupe system, including placing one or two oculars in a line of sight with an eye of a user, while improving overall ergonomics, including peripheral vision, comfort, stability, and adjustability. Methods of use are also provided.