Floating Image Module With Aspheric Surfaces for Wide Viewing Angles
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Solution Overview
Problem
Conventional floating image generation devices have a limited field-of-view angle of around 59°, making images invisible to users positioned outside this range.
Innovation Solution
The image generating module and floating image generation device employ a light receiving surface with a smaller radius of curvature near the light axis and a light emitting surface with a larger radius of curvature, allowing for a field-of-view angle of at least 80° by optimizing the aspheric coefficients and material properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional image generation devices use a standard lens design, then the device structure is simple, but the field-of-view angle is limited to around 59°
Solution Approach 1:
The patent employs an aspheric lens design where the light receiving surface and light emitting surface have different radii of curvature. Specifically, the absolute value of the radius of curvature of the light receiving surface at a position close to the light axis is smaller than that of the light emitting surface. This asymmetric curvature configuration expands the field-of-view angle from the conventional 59° to at least 80° while maintaining a single-lens structure that does not significantly increase device complexity.
2Adaptability or versatility
If the radius of curvature of both surfaces is made equal, then the lens manufacturing is simpler, but the field-of-view angle cannot be expanded beyond 59°
Solution Approach 1:
The patent applies different radii of curvature to different surfaces of the same lens. The light receiving surface has a smaller radius of curvature near the light axis compared to the light emitting surface. This localized differentiation in curvature properties allows the lens to expand the field-of-view angle to at least 80° while managing the manufacturing precision requirements through targeted aspheric coefficient optimization rather than uniform complexity across the entire lens.
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 enhanced field-of-view angle provides a better user experience by ensuring images are visible up to 80° from the light axis, improving visibility and interaction capabilities.
Implementation Method 1
The absolute value of the radius of curvature of the light receiving surface at a position close to the light axis is smaller than the absolute value of the radius of curvature of the light emitting surface at a position close to the light axis
Data Source
AI summary
An image generating module and a floating image generation device are disclosed. The image generating module includes an image generation unit and a floating image generation unit. The floating image generation unit having a light axis is disposed parallelly on one side of the image generation unit and includes a light receiving surface and a light emitting surface disposed opposite to each other. The light receiving surface faces the image generation unit. The image generation unit provided an output light for generating a real image outside the light emitting surface. The absolute value of the radius of curvature of the light receiving surface at a position close to the light axis is smaller than the absolute value of the radius of curvature of the light emitting surface at a position close to the light axis. The floating image generation device includes a light source and the image generating module. The floating image generation unit is disposed parallelly on the opposite side of the image generation unit with respect to the light source. The light emitted by the light source passes through the image generation unit to generate a real image.