Head-Mounted Optometric System Using Digital Holographic Correction
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Solution Overview
Problem
Current head-mounted automated phoropter systems are optically, mechanically, and electrically complex, leading to high manufacturing costs, and Spatial Light Modulators used for correction have low resolution and cause chromatic aberrations, limiting the applicability and commercial potential of digital visual correction systems.
Innovation Solution
The system employs a head-mounted optometric system with a light source, mirror, beamsplitter, and wavefront sensor to measure wavefront errors, which are then corrected digitally using a cloud-based Graphics Processing Unit (GPU) and computer-generated holograms, eliminating the need for tunable lenses and reducing overall complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a tunable lens system (TLS) is used for visual correction in a head-mounted system, then optical correction capability is achieved, but the device becomes optically, mechanically, and electrically complex with high manufacturing cost
Solution Approach 1:
The patent replaces the mechanical tunable lens system with a digital optical correction system using spatial light modulators and computer-generated holograms. This substitution eliminates complex mechanical components while achieving the same visual correction function through digital processing and optical field manipulation.
Solution Approach 2:
The patent uses computer-generated holograms to create digital copies of corrective lens functions. Instead of physical tunable lenses, the system generates holographic patterns that replicate the optical correction effect, enabling software-controlled vision correction without mechanical hardware.
2Measurement precision
If Spatial Light Modulators (SLMs) are used to generate corrected images, then digital visual correction is achieved, but resolution is low and chromatic aberrations occur
Solution Approach 1:
The patent employs adaptive algorithms that dynamically adjust the holographic parameters based on measured wavefront errors. By changing the computational parameters in real-time and optimizing the hologram patterns, the system compensates for chromatic aberrations and enhances resolution beyond the physical limitations of the SLM hardware.
Solution Approach 2:
The system uses wavefront sensing to measure optical errors and feeds this information back to the digital correction algorithm. This closed-loop feedback enables real-time optimization of the holographic correction patterns, allowing the system to compensate for chromatic aberrations and improve visual precision adaptively.
3Adaptability or versatility
If higher-order aberrations are corrected on-site using digital methods, then applicability and commercial potential increase, but processing power requirements increase
Solution Approach 1:
The patent divides the correction process into distinct segments: wavefront measurement, error analysis, hologram generation, and visual display. This segmentation allows each component to be optimized independently, enabling complex higher-order aberration correction to be achieved through coordinated simple operations rather than requiring massive centralized processing power.
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 approach allows for efficient and accurate digital correction of vision, increasing the applicability and commercial potential of the device by minimizing processing power requirements and reducing manufacturing costs, enabling home-based or point-of-care eye exams without visiting a doctor's office.
Implementation Method 1
a light source configured to generate light
Implementation Method 2
a mirror configured to reflect light generated by the light source
Implementation Method 3
the beamsplitter configured to split light into a first beam and a second beam
Implementation Method 4
the wavefront sensor configured to compare light reflected from the eye of the patient and the second beam to measure one or more wavefront errors
Data Source
AI summary
A head-mounted optometric system for correction of an eye of a patient. The system may comprise a light source configured to generate light, a mirror configured to reflect light generated by the light source towards a beam splitter that is configured to split light into a first beam directed into the eye of the patient and a second beam directed into a wavefront sensor. The system may further comprise the wavefront sensor configured to compare light reflected from the eye of the patient and the second beam to measure errors, and a digital correction system coupled to the wavefront sensor, configured to generate and apply a processed image for correcting the eye of the patient.