Multi-zone mirror graded transition for uniform reflectance

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Solution Overview

Problem

Existing multi-zone mirrors struggle to achieve a seamless transition between opaque and transflective areas, leading to variations in color and intensity across the mirror surface, which affects the stealthy appearance and aesthetic appeal, particularly when different reflectance and transmittance values are required in various zones.

Innovation Solution

The implementation of a multi-zone reflector design featuring a graded or abrupt transition between opaque and transflective areas, utilizing a split reflector stack with a graded opacifying layer and varying thicknesses of reflecting layers to decouple reflectance and transmittance values, ensuring a seamless visual match between zones.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a multi-zone mirror uses different reflectance and transmittance values in various zones, then the functionality and adaptability are improved, but the visual uniformity and aesthetic appeal deteriorate due to color and intensity variations across the mirror surface

Engineering Contradiction:
Improvefunctional adaptabilityVSAvoidvisual uniformity
Core Design Contradiction:
Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent applies local quality by implementing different optical properties (reflectance and transmittance values) in specific zones of the mirror while using a graded transition region to maintain visual uniformity. The transition region has intermediate optical properties that gradually change from one zone to another, creating local variations in functionality while preserving overall visual consistency.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent employs parameter changes by systematically varying the optical properties (reflectance and transmittance) across different zones and through the transition region. The graded transition region uses intermediate parameter values that gradually shift from the properties of one zone to another, enabling functional adaptability while maintaining visual uniformity through controlled parameter transitions.

Inventive Principle:
Principle #35Parameter changes

2Stability of the object's composition

If a multi-zone mirror uses a graded transition between opaque and transflective areas, then the visual uniformity and aesthetic appeal are improved, but the manufacturing complexity increases due to the need for precise thickness control of multiple layers

Engineering Contradiction:
Improvevisual uniformityVSAvoidmanufacturing complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the mirror into distinct zones (opaque zone, transition region, transflective zone) with different optical properties. Each zone is manufactured as a separate region with specific layer thicknesses, allowing precise control over optical characteristics while managing manufacturing complexity through modular design.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements nested doll by creating a multi-layer structure where different reflective and transmissive layers are nested within each other. The graded transition region contains multiple layers with varying thicknesses that are nested to achieve the desired gradual optical property transitions, enabling visual uniformity through layered construction.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Manufacturing precision

If a multi-zone mirror uses an abrupt edge transition between opaque and transflective zones, then the manufacturing precision is improved, but the visual uniformity and aesthetic appeal deteriorate due to visible transition boundaries

Engineering Contradiction:
Improvetransition definition precisionVSAvoidvisual uniformity
Core Design Contradiction:
Manufacturing precisionVSStability of the object's composition

Solution Approach 1:

The patent employs parameter changes by creating a graded transition region where optical properties (reflectance and transmittance) gradually change from the opaque zone to the transflective zone. This intermediate transition region with varying parameter values eliminates abrupt visual boundaries while maintaining precise manufacturing control through defined thickness profiles.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent applies local quality by implementing a transition region with intermediate optical properties between the opaque and transflective zones. This localized region with graded properties smooths the visual transition while maintaining manufacturing precision through controlled thickness variations in the intermediate area.

Inventive Principle:
Principle #3Local quality

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 design achieves uniform color and reflectance across the mirror surface, maintaining stealthy characteristics while allowing for independent adjustment of reflectance values in different zones, enhancing the aesthetic appeal and functionality of the mirror.

Implementation Method 1

an opacifying layer having a lower surface facing the supporting base and an upper surface, the opacifying layer disposed substantially outside the first transflective zone adjacent to the lower reflecting layer of the reflector

Methodology Applied
Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Implementation Method 2

a lower reflecting layer disposed adjacent the supporting base, the lower reflecting layer substantially completely covering a first transflective zone of the reflector

Methodology Applied
Scientific EffectReflection: Reflection

Data Source

PatentUS8035881B2Multi-zone mirrors
Publication Date: 2011.10.11 GENTEX CORP
  • US8035881B2 patent drawing
  • US8035881B2 patent drawing
  • US8035881B2 patent drawing

AI summary

A multi-zone reflector having an opaque zone and a transflective zone. The reflector includes a supporting base, a lower reflecting layer disposed adjacent the supporting base, and an upper reflecting layer extending over the opacifying layer and the transflective zone of the reflector. The lower reflecting layer substantially completely covers the transflective zone, and the opacifying layer is disposed substantially outside the transflective zone adjacent to the lower reflecting layer. Over at least a portion of the transflective zone, the upper and lower reflecting layers have a common surface.