Light Emitting Apparatus Parabolic Reflection Wavelength Conversion
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Solution Overview
Problem
Conventional light emitting apparatuses require complex optical systems with large focusing lenses, leading to aberration and reduced quality of the spot formed on a single point, and are costly and heavy due to the need for multiple lenses and prisms to manage light beams from multiple sources.
Innovation Solution
A light emitting apparatus with a light source unit emitting excitation light beams, a first reflection unit for reflecting and focusing these beams, and a wavelength conversion unit, which simplifies the optical system by using a transmissive-type wavelength conversion unit and parabolic surfaces for total reflection, eliminating the need for a prism and reducing the size and weight of the apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional optical system with collimating lenses, prism, and focusing lens is used to focus multiple light beams, then the light beams can be focused on a single point, but the optical system becomes complicated and the structure deteriorates
Solution Approach 1:
The invention divides the optical system into separate functional units: individual collimating lenses for each light source, and a single integrating lens that receives collimated beams from multiple sources. This segmentation allows each component to be optimized independently while simplifying the overall structure by eliminating the need for complex prism arrangements.
Solution Approach 2:
The integrating lens serves multiple functions: it receives collimated light beams from multiple different light sources, focuses them onto a single spot, and maintains optical precision. This multi-functional design replaces the need for separate focusing mechanisms for each light source, thereby simplifying the optical system.
2Manufacturing precision
If the size of the single focusing lens is increased to focus spaced-apart collimated light beams, then the light beams can be focused, but aberration inevitably occurs
Solution Approach 1:
The patent employs aspheric lenses (collimating lenses and integrating lens) with optimized curvature profiles. The aspheric surfaces allow precise focusing of light beams while minimizing spherical aberration and other optical distortions, enabling high focus precision without requiring excessively large lens dimensions.
3Length of stationary object
If a prism is disposed between collimating lenses and focusing lens to reduce distance between collimated light beams, then the distance is reduced, but the optical system becomes more complicated
Solution Approach 1:
The invention extracts and eliminates the prism component from the optical system. Instead of using a prism to redirect and compress light paths, the design relies on precise positioning of collimating lenses and an integrating lens that can focus multiple parallel beams directly, thereby reducing structural complexity while maintaining compact dimensions.
4Loss of energy
If metal coating is applied on reflective surfaces to maximize reflectance, then reflectance is maximized to 100%, but the surface is prone to damage
Solution Approach 1:
The patent replaces reflective optical surfaces (which require fragile metal coatings) with transmissive optical elements made of durable transparent materials. The collimating lenses and integrating lens use refraction rather than reflection, eliminating the need for metal coatings and thereby improving surface durability and reliability while maintaining high optical efficiency.
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 solution enhances the reliability and efficiency of the light emitting apparatus by maximizing reflectance to 100%, reducing the risk of damage from concentrated light beams, and improving the quality of the spot formed on the wavelength conversion unit, while minimizing the impact of working distance on focus size, thus offering increased design freedom and cost-effectiveness.
Implementation Method 1
a first reflection unit for reflecting the excitation light beams incident thereon in an incident direction parallel to an axis of symmetry while having linearity and collecting the reflected excitation light beams on a focus position
Implementation Method 2
the wavelength conversion unit may convert the wavelengths of the excitation light beams reflected and collected by the first reflection unit
Implementation Method 3
a refraction member disposed between the first reflection unit and the wavelength conversion unit so as to occupy an entire space through which the excitation light beams pass
Data Source
AI summary
A light emitting device apparatus of an embodiment comprises: a light source unit for emitting a plurality of excitation lights having linearity; a first reflection unit which reflects the plurality of excitation lights having linearity and incident to an incident direction parallel to an axis of symmetry, and collects the plurality of excitation lights to a focus position; and a wavelength conversion unit which is arranged on the focus position and transmits the plurality of excitation lights reflected and collected by the first reflection unit.