Microscope Illumination Using LED Arrays and Luminescence Colorants
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Solution Overview
Problem
Conventional microscope light sources, such as halogen lamps, are expensive, require high power, have short service life, and cannot provide continuous spectral illumination, while existing LED solutions struggle to achieve sufficient brightness and white light illumination for various microscopy methods.
Innovation Solution
A microscope illumination system using surface or spatially-arranged LEDs connected to a control unit, with luminescence colorants embedded in a substance layer or applied to mirrors, to generate flexible illuminating patterns and spectrums, including white light with full daylight spectrum, without additional optical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If halogen lamps are used as light sources, then sufficient brightness and continuous spectrum illumination are achieved, but high power consumption, short service life, and high cost occur
Solution Approach 1:
The patent transitions from thermal radiation sources (halogen lamps) to electroluminescence sources (LEDs), fundamentally changing the physical mechanism of light generation. This parameter change enables lower power consumption while maintaining illumination intensity through optimized LED arrays with appropriate color temperatures and luminous flux.
Solution Approach 2:
The patent employs LEDs which, although individually having long service life, can be replaced as a modular unit. The LED array is designed as a replaceable component that can be easily swapped when degradation occurs, reducing maintenance costs and downtime compared to expensive halogen lamp replacements.
2Stability of the object's composition
If halogen lamps are used as light sources, then continuous spectrum illumination is achieved, but short service life occurs
Solution Approach 1:
The patent divides the continuous spectrum into discrete wavelength bands covered by different colored LEDs (red, green, blue, yellow, cyan, magenta). By combining multiple LED types with peak emissions at different wavelengths, the system reconstructs a continuous-like spectrum through additive color mixing, achieving spectral stability without the short service life of halogen lamps.
3Use of energy by moving object
If LED arrays are used to reduce power consumption, then lower energy use is achieved, but insufficient brightness and limited spectral range occur
Solution Approach 1:
The patent combines multiple LED types with different color characteristics (red, green, blue, yellow, cyan, magenta LEDs) into a single integrated array. This merging of different light sources enables the system to achieve high overall brightness by summing the luminous flux of individual LEDs while maintaining low power consumption and providing a continuous-like spectrum through additive mixing.
4Illumination intensity
If ground glass screens are added to achieve uniform illumination, then illumination uniformity is improved, but device complexity and additional optical components occur
Solution Approach 1:
The patent assigns different functional properties to different regions of the LED array. LEDs are selectively arranged and controlled to provide different color temperatures and luminous intensities in different spatial zones. This local differentiation enables uniform overall illumination without requiring additional diffusing elements like ground glass screens, reducing system complexity.
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 provides flexible, cost-effective, and efficient illumination for various microscopy methods, including bright field, dark field, and fluorescence, with improved brightness and spectral control, suitable for field use and reducing maintenance costs.
Implementation Method 1
the light source comprises one or several semiconductor emitters
Implementation Method 2
The light sources comprise LEDs which excite at least one luminescence colorant
Data Source
AI summary
The invention relates to an illuminating device for microscopes, wherein the light source has, in particular, a white light illumination having total daylight spectrum and/or an excitation light source for fluorescent colors. The inventive illuminating device for a microscope consists of surface or spatially arranged light sources, which are connected to a control unit for generating any desired illuminating patterns and illuminating spectrums, and an illuminating optic to image these illuminating patterns on the object to be examined. The light sources consist of LEDs (11) which excite at least one luminescence color (14) which is adapted to the wavelength which is emitted by the LEDs (11). The LEDs (11) are arranged concentrically to the optical axis of the illuminating device, preferably, in or in the vicinity of the aperture diaphragm plane. The microscope illumination enables realization of flexible illumination structures and illumination spectrums for bright field, dark field, fluorescence, inclined and/or annularly-shaped illumination, and also white light illuminations having total daylight spectrum. Due to the advantages of the LEDs (economical, low power consumption, long service life and easy to control), such illumination devices are particularly suitable for use in the field, for example, in archaeology, geology and in protecting the environment.