Medical Luminaire Diffuser for Uniform Illumination
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Solution Overview
Problem
Current medical luminaires for intraoral illumination suffer from high brightness gradients and manufacturing inaccuracies leading to non-uniform illumination and dazzling effects, causing eye fatigue for dentists.
Innovation Solution
Incorporating a diffuser with a holographic structure into the optical path of the luminaire to widen the field of light and reduce brightness gradients, which can be integrated into the cover plate or existing optical components, enhancing uniformity and reducing reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If optical means (collimator and condenser) are used to generate a focused field of light, then illumination intensity in the surgical field is improved, but brightness gradient becomes too steep causing eye fatigue
Solution Approach 1:
A diffuser is introduced as an intermediary element in the optical path between the condenser and the surgical field. The diffuser has a specific structure with light-transmitting regions and light-reflecting regions that scatter and redistribute light, reducing the steepness of the brightness gradient while maintaining adequate illumination intensity in the surgical field.
Solution Approach 2:
The diffuser structure implements local quality by having different regions with different optical properties - some regions transmit light directly while others reflect light. This creates a non-uniform diffuser structure that locally adjusts light distribution to achieve overall homogeneous illumination with reduced brightness gradient.
2Ease of operation
If multiple illuminating units are arranged to superimpose fields of light, then shadow formation is minimized, but manufacturing inaccuracies cause offsets and non-uniform illumination
Solution Approach 1:
The diffuser acts as a mediator that optically couples the multiple illuminating units together. By scattering and redistributing light from each unit, the diffuser creates overlapping transition regions that mask small misalignments between individual fields, making the overall illumination appear more uniform despite manufacturing tolerances.
Solution Approach 2:
The diffuser changes the spatial distribution parameter of light by introducing controlled scattering. This transforms the sharp boundaries between individual illuminating unit fields into gradual transitions, effectively masking alignment errors and creating a more uniform perceived illumination field.
3Reliability
If a cover plate is provided to protect optical components, then component protection is improved, but light transmission and illumination quality deteriorate
Solution Approach 1:
The diffuser structure is designed to serve multiple functions simultaneously: it protects the optical components (acting as a cover plate), transmits light effectively, and improves illumination quality by reducing brightness gradient. This multi-functional element replaces the traditional single-function cover plate.
Solution Approach 2:
The diffuser can be implemented as a composite structure combining light-transmitting and light-reflecting regions, or as a coating applied to a protective substrate. This composite approach allows the cover plate to maintain its protective function while adding optical modification capabilities to improve light distribution.
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 diffuser provides a more homogeneous and agreeable illumination by minimizing perceived offsets and contrasts, reducing eye fatigue and dazzling, while being economically integrated into existing manufacturing processes.
Implementation Method 1
a diffuser configured to widen the field of light in the object plane
Implementation Method 2
In this connection it has become evident that such a high so-called brightness gradient can have a fatiguing effect on the activity of the eyes of the dentist
Data Source
AI summary
A medical luminaire, for example a dental treatment luminaire for the intraoral illumination of a surgical field, has at least one illuminating unit with light-producing means and with optical means for generating a field of light in an object plane, wherein a diffuser is provided that is designed to widen the field of light in the object plane.