Illumination Apparatus Shield Reduces Glare
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Solution Overview
Problem
Existing illumination apparatuses using ellipsoidal mirrors to reflect light often suffer from glare and uneven light distribution due to the reflection of light at large angles, which can lead to discomfort in the illumination space.
Innovation Solution
The illumination apparatus includes a housing, a first light source, a first lens optical system, and at least one shield. The shield is positioned on the path of the first light and includes a second opening that allows the light to pass through, reducing the divergence angle of the light emitted through the opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an ellipsoidal mirror is used to reflect light, then the light can be directed to illuminate a space, but glare and uneven light distribution occur due to large reflection angles
Solution Approach 1:
The patent extracts and removes the harmful reflected light components that cause glare by using a shield structure with a specific opening. The shield blocks light rays that would otherwise reflect at large angles from the ellipsoidal mirror, allowing only beneficial light paths to reach the illumination space, thereby eliminating glare while maintaining uniform illumination.
Solution Approach 2:
The shield with the specifically designed opening acts as an intermediary element between the ellipsoidal mirror and the illumination space. It mediates the light paths by selectively blocking harmful reflected rays while permitting useful illumination rays to pass through, thus resolving the contradiction between achieving adequate illumination and preventing glare.
2Area of stationary object
If light is emitted with a large divergence angle, then the illumination space can be covered, but the light distribution becomes uneven and causes discomfort
Solution Approach 1:
The shield introduces local quality control by creating a specific opening geometry that selectively manages light paths. The opening is positioned and dimensioned to allow light rays within certain angular ranges to pass while blocking others, thereby achieving uniform light distribution across the illumination space without requiring all light to travel at large divergence angles.
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 reduces glare and unevenness in the illumination space by ensuring that the light is emitted at a controlled divergence angle, resulting in a more comfortable and uniformly lit environment.
Implementation Method 1
The first lens optical system includes at least one first lens between the first emission portion and the first opening in the housing on a path of the first light. The first lens optical system forms an image of the first light from the first emission portion on an imaginary image plane adjacent to the first opening and causes the first light to be emitted through the first opening.
Implementation Method 2
The first light is partially incident on the at least one shield. Two outermost beams of the first light on the first emission portion form a smaller angle after passing through the second opening in the at least one shield than before passing through the second opening.
Data Source
AI summary
An illumination apparatus includes a housing, a first light source, a first lens optical system, and a shield. The housing includes a first opening. The first lens optical system includes at least one first lens between a first emission portion of the first light source and the first opening in the housing on a first light path. The first lens optical system forms an image of the first light from the first emission portion on an imaginary image plane adjacent to the first opening and causes the first light to be emitted through the first opening. The shield includes a second opening to allow passage of the first light. The first light is partially incident on the shield. Two outermost beams of the first light on the first emission portion form a smaller angle after passing through the second opening in the shield than before passing through the second opening.