Skin Imaging Illumination Layout to Reduce Objective Cover Reflection
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Solution Overview
Problem
Existing imaging devices face issues with light reflection from objective glasses, which can impair proper imaging of skin surfaces and other targets.
Innovation Solution
An illumination device with an objective cover and light sources positioned closer to the imager than the objective cover, where light sources are arranged to minimize reflection on the objective cover and direct light towards the imager, reducing the impact of reflected light on imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light sources are positioned near the objective glass to illuminate the target, then illumination intensity is improved, but light reflection from the objective glass increases and impairs imaging quality
Solution Approach 1:
The patent positions light sources in a spatial configuration outside the inverted region formed by inverting the pencil of rays, utilizing three-dimensional spatial arrangement to separate illumination and imaging optical paths. This dimensional positioning allows light to illuminate the target effectively while preventing reflected light from entering the imaging lens, thus resolving the contradiction between illumination intensity and light reflection interference.
Solution Approach 2:
The objective cover acts as an intermediary element between the light sources and the objective glass. The light sources illuminate the target through the objective cover, and the specific positioning ensures that reflected light from the objective glass does not enter the imaging system. This intermediary arrangement enables effective illumination while minimizing harmful reflections.
2Measurement precision
If light sources are positioned to avoid reflection, then imaging quality is improved, but illumination effectiveness may be reduced
Solution Approach 1:
By utilizing three-dimensional spatial positioning outside the inverted ray region, the patent achieves both effective illumination and high imaging quality. The light sources are positioned to maximize illumination effectiveness while maintaining proper imaging by avoiding reflection interference, thus resolving the contradiction between imaging quality and illumination effectiveness.
Solution Approach 2:
The patent optimizes the positioning parameters of light sources relative to the objective cover and imaging lens. By carefully selecting the spatial coordinates and angular positions of light sources, the system achieves optimal balance between illumination effectiveness and imaging quality, ensuring that light efficiently illuminates the target without creating harmful reflections.
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 allows for proper imaging by minimizing the effect of reflected light, ensuring stable and efficient imaging of skin surfaces.
Implementation Method 1
an objective cover 132 including a light transmissive member 132b to direct light from the target to the imager
Implementation Method 2
at least one light source 141 to illuminate the target through the objective cover 132
Implementation Method 3
an imaging lens 41 configured to form an image of the target on the image sensor 44
Implementation Method 4
light from the light sources illuminating the skin may be reflected by the objective glass depending on the positions of the light sources
Data Source
AI summary
An imaging device includes an illumination device and an imager which images a target. The illumination device includes an objective cover including a light transmissive member, and a light source located nearer the imager than the objective cover to illuminate the target through the objective cover. A sectional shape of a first region outside the illumination device on a target side of the objective cover and a sectional shape of a second region inside the illumination on an imager side of the objective cover are symmetrical with respect to a front surface of the objective cover as an axis of symmetry. The first and second regions are regions bounded by light propagating while the objective cover is in contact with the target, and the light source is provided outside the second region.