Wearable Spectroscopy System Ambient Light Correction
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Solution Overview
Problem
Current augmented reality systems face challenges in accurately identifying materials in real-time using spectroscopy due to interference from ambient light, which complicates the interpretation of reflected light properties.
Innovation Solution
A wearable spectroscopy system integrated with a head-mounted display that emits light of specific wavelengths, detects reflected light, and applies an ambient light correction using an anti-scatter grid and absorption database to identify material characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ambient light correction is applied to detected light, then measurement precision of material characteristics is improved, but device complexity increases due to additional correction processing
Solution Approach 1:
The system performs preliminary measurement of ambient light levels using the same detector before or during the spectroscopic measurement. This ambient light data is stored and then used to correct the detected signal, eliminating the need for complex real-time subtraction algorithms and simplifying the overall processing architecture while maintaining high measurement precision.
2Adaptability or versatility
If multiple wavelength light sources are used for comprehensive material analysis, then adaptability of the system is improved, but use of energy increases
Solution Approach 1:
Instead of continuously illuminating with multiple wavelength light sources, the system uses periodic pulsed illumination at different wavelengths sequentially. This allows the detector to capture spectral information across multiple wavelengths while significantly reducing total energy consumption, as the light sources are activated only during brief measurement intervals rather than continuously.
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 effectively accounts for ambient light interference, enhancing the accuracy of material identification and display of characteristics to the user, providing a more reliable and user-friendly augmented reality experience.
Implementation Method 1
one or more electromagnetic radiation detectors coupled to the head-mounted display system and configured to receive reflected light from a target object irradiated by the one or more light sources
Implementation Method 2
applying the ambient light correction to the detected light to determine levels of light absorption related to the emitted light and reflected light from the target object
Data Source
AI summary
Wearable spectroscopy systems and methods for identifying one or more characteristics of a target object are described. Spectroscopy systems may include a light source configured to emit light in an irradiated field of view and an electromagnetic radiation detector configured to receive reflected light from a target object irradiated by the light source. One or more processors of the systems may identify a characteristic of the target object based on a determined level of light absorption by the target object. Some systems and methods may include one or more corrections for scattered and/or ambient light such as applying an ambient light correction, passing the reflected light through an anti-scatter grid, or using a time-dependent variation in the emitted light.