Optical Medical Examination Device with Segmented Light Sources
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Solution Overview
Problem
Existing optical examination devices, such as dermatoscopes, face challenges in providing compact designs while offering illumination with varying colour temperatures and polarizations to effectively visualize skin structures, which are best visible under different lighting conditions.
Innovation Solution
The device employs a combination of at least one white light source and one bluer light source, with the bluer light source emitting wavelengths between 400 nm to 550 nm, and uses polarization filters to achieve the required colour temperature and polarization settings, eliminating the need for multi-coloured LEDs and allowing for compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-coloured LEDs are used to provide light with different colour temperatures, then the illumination can cover various skin structures, but the device size increases and compactness is reduced
Solution Approach 1:
The illumination device is segmented into multiple independent light sources, each emitting a specific wavelength range (violet 380-450nm, blue 450-495nm, cyan 495-520nm, green 520-565nm). This segmentation allows each LED to be optimized for its specific function while maintaining overall compactness, as individual LEDs are smaller than a single multi-coloured LED component.
2Adaptability or versatility
If multiple light sources with different spectra are combined, then sufficient colour temperature changes can be achieved, but the light source design becomes more complex
Solution Approach 1:
Multiple LED light sources emitting different wavelength ranges are merged into a single illumination device housing. The control unit integrates the control of all LED types, and the optical system combines their light paths. This merging achieves comprehensive colour temperature adjustment (2000K-10000K) while consolidating what could have been separate devices into one compact unit.
Solution Approach 2:
The illumination device implements dynamic control of LED combinations through the control unit, which can selectively activate different LED types based on examination requirements. The system dynamically adjusts which LEDs are active and at what intensity levels, enabling real-time colour temperature adaptation without requiring physical reconfiguration of the light source assembly.
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 configuration enables optimal lighting for different examinations by adjusting colour temperature and polarization, ensuring visibility of skin structures without the bulk of multi-coloured LEDs, thus enhancing operability and image quality.
Implementation Method 1
The light sources are LEDs, for example
Implementation Method 2
uses polarization filters to achieve the required colour temperature and polarization settings
Data Source
AI summary
An examination device for optical medical examinations having an optics system and an illumination device. The illumination device includes at least one first light source and at least one second light source arranged in such a way that they illuminate an examination region together. The first light source is configured to emit white light and the second light source is configured to emit light that is bluer than the white light. The light emitted by the at least one second light source has a wavelength in the range of 400 nm to 550 nm and/or the illumination device includes multiple first light sources and multiple second light sources, the first light sources and the second light sources are arranged adjacent to each other and form pairs, wherein the illumination device includes at least one polarization filter that covers every second pair.