Operating Microscope and Endoscope Color Temperature Matching
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Solution Overview
Problem
The combination of an operating microscope and an endoscope in surgical interventions often results in a color change of the observed operating field due to differences in light source color temperatures, leading to a distorted color impression and impaired assessment by the treating physician.
Innovation Solution
Matching the LED light source of the endoscope to the xenon light source of the operating microscope in terms of color temperature, with a deviation of no more than 500 K, and using RGB LEDs or color filters to ensure consistent color rendering, thereby minimizing perceivable color changes and maintaining accurate color representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the endoscope uses an LED light source with different color temperature than the operating microscope's xenon light source, then the endoscope can provide flexible illumination, but the color impression of the operating field becomes distorted when both light sources illuminate overlapping regions
Solution Approach 1:
The patent applies parameter changes by adjusting the color temperature of the LED light source in the endoscope to match the xenon light source in the operating microscope. Specifically, the LED is selected or tuned to have a color temperature within 500K deviation (preferably within 300K) of the xenon source, ensuring that both light sources produce consistent color rendering in overlapping illumination regions, thereby eliminating color distortion while preserving the flexibility benefits of LED illumination.
2Use of energy by moving object
If the LED light source of the endoscope has a peak in the blue spectral range, then the LED provides efficient illumination, but the perceived color temperature becomes too cold and the image appears red-tinged when viewed through the operating microscope
Solution Approach 1:
The patent addresses this contradiction by changing the spectral parameters of the LED light source. Instead of using a standard blue-peaked LED, the invention selects or modifies LEDs to have a color temperature matching the xenon reference light source. This may involve using LEDs with different phosphor compositions or combining multiple LED wavelengths to achieve a spectrum that mimics xenon's color temperature, thereby maintaining LED efficiency while achieving color consistency.
Solution Approach 2:
The patent introduces a color temperature matching criterion as an intermediary parameter between the LED's inherent blue spectral characteristics and the xenon light source's color appearance. By establishing the xenon light source's color temperature as a reference standard and selecting LED parameters relative to this intermediary reference, the system achieves color consistency without requiring direct spectral matching between fundamentally different light source types.
3Area of stationary object
If both the operating microscope and endoscope illuminate overlapping regions of the operating field, then complete illumination coverage is achieved, but color deviation occurs in the overlapping region due to different color temperatures of the two light sources
Solution Approach 1:
The patent resolves this contradiction by changing the color temperature parameter of the endoscope's LED light source to match the operating microscope's xenon light source. By selecting LEDs with color temperatures within 500K (preferably within 300K) of the xenon reference, the system ensures that overlapping illumination regions maintain uniform color appearance across the entire operating field, while still achieving complete illumination coverage through the combined illumination areas of both light sources.
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 solution prevents color changes in the observed operating field, ensuring a consistent and natural color impression for the treating physician, even when both light sources illuminate overlapping regions, thus improving the accuracy of surgical interventions.
Implementation Method 1
the endoscope is equipped with a white light LED that has a typical peak in the blue spectral range
Implementation Method 2
Matching the LED light source of the endoscope to the xenon light source of the operating microscope in terms of color temperature, with a deviation of no more than 500 K
Implementation Method 3
the operating microscope is equipped with a xenon light source that has a relatively uniform intensity distribution in the color spectrum over the range visible to the human eye
Implementation Method 4
the operating microscope has eyepieces, lenses and a magnification optical unit with, in particular, variable magnification in order to image the operating field in a magnified manner
Implementation Method 5
The endoscopes likewise include an observation beam path with, for example, eyepiece, lens and magnification optics
Data Source
AI summary
A system combines an operating microscope and an endoscope. The operating microscope includes a light source with a first color temperature that illuminates a first portion of an operating field. The endoscope includes an LED light source with a second color temperature that illuminates a second portion of the operating field, wherein the two color temperatures are matched to one another in such a way that, in optical and/or digital imaging of the operating microscope and/or in optical and/or digital imaging of the endoscope, there are no perceivable color differences in portions of the operating field that are illuminated and observed jointly by the operating microscope and the endoscope.