Adaptive Spectacle Lens with Brightness Sensor for Aberration Correction
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Solution Overview
Problem
Existing optical observation instruments, such as spectacles, struggle to effectively correct viewing defects of second and higher order, particularly due to variations in pupil diameter and cornea shape, which affect refractive power and aberrations under different illumination conditions.
Innovation Solution
Incorporating a brightness sensor to capture ambient light intensity and, optionally, measuring pupil diameter, allowing for adjustable refractive power of optical elements to compensate for these influences, enabling precise correction of viewing defects by adjusting the spectacle lenses in selected areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the refractive power of spectacle lenses is adjusted to correct viewing defects, then the correction of second and higher order defects is improved, but the correction is insufficient due to unaccounted variations in pupil diameter and cornea shape
Solution Approach 1:
The patent implements a feedback mechanism where a brightness sensor continuously monitors ambient light intensity and feeds this information to a control unit. The control unit then dynamically adjusts the refractive power of the spectacle lenses in response to changes in illumination conditions, creating a closed-loop system that adapts to varying environmental conditions to maintain optimal visual correction.
Solution Approach 2:
The patent employs dynamically adjustable refractive power in the spectacle lenses, transitioning from static to dynamic correction. The lenses can change their optical properties in real-time based on feedback from the brightness sensor, allowing the system to adapt to varying illumination conditions and maintain accurate correction of viewing defects across different environments.
2Device complexity
If fixed refractive power is used in spectacle lenses, then the device complexity is reduced, but the ability to correct viewing defects under varying illumination conditions deteriorates
Solution Approach 1:
The system performs self-adjustment through an automated feedback mechanism. The brightness sensor automatically detects changes in ambient light and triggers the control unit to adjust the refractive power without requiring manual intervention from the user. This self-service capability maintains reliable correction while managing complexity through automation rather than manual controls.
Solution Approach 2:
The patent changes the refractive power parameter of the spectacle lenses dynamically based on ambient light conditions. By adjusting this critical optical parameter in response to brightness sensor feedback, the system maintains optimal correction performance across varying illumination conditions without requiring multiple fixed lenses or complex manual adjustment mechanisms.
3Adaptability or versatility
If the refractive power is adjusted dynamically, then the correction of viewing defects under varying illumination is improved, but the device complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes signals from the brightness sensor, calculates the required refractive power adjustment, and controls the lens adjustment mechanism. This multi-functionality consolidates what could be separate complex components into a single integrated unit, reducing overall system complexity while maintaining adaptability to illumination conditions.
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with an electronically controlled system. Instead of mechanical switches or adjustable elements, the system uses electronic sensors and control units to dynamically adjust refractive power, simplifying the overall device architecture while enabling precise adaptation to varying lighting conditions.
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
Substantially compensates for the effects of varying pupil diameter and non-spherical cornea shape, effectively correcting viewing defects of second and higher order, and allowing for adaptable refractive power adjustments across various conditions.
Implementation Method 1
a brightness sensor (24) which measures the illumination intensity of ambient light impinging on the eyes of a user
Data Source
AI summary
An optical observation instrument, in particular a spectacle, a reading aid or a telescope, comprises an optical element, in particular a spectacle lens, adapted to be controllably adjustable in its refractive power, a sensor, and a control unit for adjusting the refractive power as a function of signals from the sensor. The sensor is a brightness sensor. In a method of controllably adjusting a refractive power of an optical element in an optical observation instrument an optical parameter is captured by means of a sensor and the refractive power is adjusted as a function of a signal from the sensor. By means of the sensor the brightness of the light impinging on the optical instrument is captured.