Condensing Lens Coating Layout for Multi-Angle Laser Transmittance
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Solution Overview
Problem
Existing optical lenses with anti-reflection films suffer from reduced transmittance due to uniform reflectance characteristics across their surfaces, leading to decreased luminous efficacy.
Innovation Solution
The implementation of first and second anti-reflection films on a condensing lens with different reflectance characteristics in distinct regions, tailored to varying incidence angles of laser beams, enhances transmittance by adjusting thickness and refractive index to minimize reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform anti-reflection film is applied across the entire lens surface, then the manufacturing process is simple, but the transmittance is reduced due to suboptimal reflectance characteristics for different incidence angles
Solution Approach 1:
The patent applies different anti-reflection films with different reflectance characteristics to different regions of the lens surface. Specifically, a first anti-reflection film is applied to a first region and a second anti-reflection film is applied to a second region, where each film is optimized for the local incidence angle characteristics of that region. This local differentiation improves overall transmittance while maintaining manufacturing feasibility through region-based processing.
Solution Approach 2:
The lens surface is divided into multiple distinct regions (first region and second region), each receiving a tailored anti-reflection film treatment. This segmentation allows the system to address the varying optical requirements of different incidence angle zones independently, optimizing transmittance for each region while collectively improving overall lens performance.
2Loss of energy
If different anti-reflection films are applied to different regions of the lens, then transmittance is improved, but the manufacturing complexity increases
Solution Approach 1:
While introducing structural complexity through multiple anti-reflection films, the patent maintains manufacturing feasibility by applying local quality optimization only where needed. Each film is tailored to its specific region's incidence angle characteristics, creating a targeted solution that improves transmittance without requiring complete system redesign.
Solution Approach 2:
The patent optimizes transmittance by changing key parameters of the anti-reflection films, including thickness and refractive index, to match the specific optical requirements of each lens region. These parameter adjustments are made within the context of existing film deposition technologies, improving performance while controlling manufacturing complexity.
3Loss of energy
If anti-reflection film thickness and refractive index are optimized for specific incidence angles, then reflectance is minimized and transmittance is maximized, but the design and manufacturing precision requirements increase
Solution Approach 1:
The patent systematically optimizes the thickness and refractive index parameters of anti-reflection films for different lens regions based on their specific incidence angle characteristics. By establishing clear parameter specifications for each region, the patent achieves minimal reflectance and maximal transmittance while providing actionable guidance for manufacturing control.
Solution Approach 2:
This principle is not applicable to this patent as the solution does not involve pneumatic or hydraulic systems.
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 achieves high transmittance of 99.8% or more by optimizing reflectance characteristics based on incidence angles, improving the overall luminous efficacy of the light source device.
Implementation Method 1
The anti-reflection films reduce surface reflection of light, so that the transmittance can be enhanced
Implementation Method 2
The condensing lens has a curved surface... laser beams incident on different regions of the curved surface
Data Source
AI summary
A light source device includes a condensing lens, a laser light source, a first anti-reflection film, and a second anti-reflection film. The condensing lens has a curved surface. The laser light source includes a plurality of laser elements configured to emit laser beams incident on different regions of the curved surface of the condensing lens. The first anti-reflection film and the second anti-reflection film are disposed in different regions of the curved surface. The first anti-reflection film has a reflectance characteristic different from a reflectance characteristic of the second anti-reflection film.