Interpupillary Calibration for Stereoscopic Displays
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Solution Overview
Problem
Current stereoscopic display systems, particularly wearable ones like surgical loupes, face challenges in accommodating varying interpupillary distances, leading to increased complexity, cost, and usability issues due to the need for mechanical adjustments to align properly with individual eye characteristics.
Innovation Solution
An interpupillary calibration system comprising a first and second display, each disposed in proximity to an eyeframe aperture, with a calibration processor that adjusts the display distance and position based on the user's interpupillary distance, using controller circuits and electronic display drivers to control image presentation and store adjustment factors for optimal stereoscopic visualization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an adjustable interpupillary distance design is used to accommodate varying distances, then the system can adapt to different users, but the complexity, weight, bulk, and cost increase significantly due to mechanical adjustment requirements
Solution Approach 1:
The patent replaces mechanical adjustment mechanisms with an electronic/software-based calibration system. The calibration processor receives user input about interpupillary distance and automatically adjusts display parameters through software control, eliminating the need for physical mechanical components while achieving the same adaptive function.
Solution Approach 2:
The system changes display parameters (image position, size, and orientation) based on input interpupillary distance values. The calibration processor modifies these parameters dynamically to match the user's specific anatomical characteristics, allowing adaptation without physical adjustment mechanisms.
2Manufacturing precision
If mechanical alignment is implemented to align displays with individual pupil locations, then stereoscopic visualization is improved, but the cost and delivery time increase significantly
Solution Approach 1:
The system performs calibration in advance by receiving user input about interpupillary distance and storing these parameters for future use. This preliminary calibration action eliminates the need for time-consuming mechanical alignment during delivery or setup, as the system is pre-configured for the specific user.
Solution Approach 2:
The system creates a digital model or representation of the user's specific interpupillary distance and pupil characteristics, storing this information in a database. This copied information is then used to automatically configure the display parameters, replacing the need for physical measurement and mechanical adjustment during delivery.
3Weight of moving object
If a fixed interpupillary distance design is used to minimize weight and bulk, then wearable comfort is improved, but the system cannot accommodate users with varying interpupillary distances
Solution Approach 1:
The patent replaces physical mechanical adjustment components with electronic/software-based calibration, eliminating the weight and bulk associated with mechanical parts while maintaining the ability to accommodate varying interpupillary distances through digital parameter adjustment.
Data Source
AI summary
Interpupillary calibration system and method for stereoscopic visualization. The system includes a first display, second display, and calibration processor. The first display is disposed in proximity to a left aperture of an eyeframe to present a first image area through the left aperture, the first image area associated with an image and having a first display axis. The second display is disposed in proximity to a right aperture of the eyeframe to present a second image area through the right aperture, the second image area associated with the image and having a second display axis. The calibration processor is configured to adjust a display distance between the first image area and second image area based on an interpupillary distance of a user, wherein the first image area and second image area are visible through the first aperture and second aperture enabling formation of a stereoscopic view of the image.