Light Diffusion Device with Protruding Covering for Flat-Top Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light diffusion devices struggle to produce a uniform flat-top light intensity distribution efficiently, particularly in medical applications like photoimmunotherapy and photodynamic therapy, due to the need for complex structures such as sealed open cavities.
Innovation Solution
A light diffusion device with an optical transmission cable and a covering layer that protrudes beyond the distal end to absorb or scatter light, utilizing a refractive member to refract light at an angle, and a tubular member to house these components, ensuring a flat-top light intensity distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sealed open cavity or similar structure is provided between the covering and the cladding to achieve flat-top light intensity distribution, then the light intensity distribution uniformity is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The invention extracts the essential function of light blocking from the complex sealed cavity structure and concentrates it into a simple protruding covering layer. The covering layer protrudes by a specific length (calculated via Equation 1) to block peripheral edge light, achieving flat-top light intensity distribution without requiring sealed cavities or complex internal structures between the covering and cladding.
Solution Approach 2:
The invention changes the geometric parameter of the covering layer by defining a specific protrusion length (Y) calculated through Equation 1, which relates the protrusion length to the aperture coefficient (NA) and cladding thickness (d2). This parameter optimization allows the simple protruding structure to achieve the same light distribution effect as complex sealed cavities, reducing device complexity while maintaining manufacturing precision.
2Manufacturing precision
If a sealed open cavity is provided between the covering and the cladding to achieve uniform light distribution, then the light intensity distribution is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The invention removes the sealed cavity structure from the design and replaces it with a simple protruding covering layer. This extraction of the essential light-blocking function into a single protruding element eliminates the need for sealed cavities, significantly improving ease of manufacture while maintaining the desired uniform light distribution.
Solution Approach 2:
The invention segments the covering layer into a main body and a protruding distal end part. The protruding portion (with length Y calculated via Equation 1) performs the light-blocking function, while the main body provides structural support and coverage. This segmentation simplifies manufacturing compared to forming sealed cavities, as the protruding structure can be easily created through standard fabrication processes.
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 device achieves easy production and uniform light distribution, enhancing treatment efficiency by maintaining intensity within a predetermined radius and reducing peripheral edge light, suitable for medical applications.
Implementation Method 1
a covering layer (20) that has at least one of a function of absorbing the light or a function of scattering the light
Implementation Method 2
a covering layer (20) that has at least one of a function of absorbing the light or a function of scattering the light
Implementation Method 3
a reflective member (30) having a refractive surface (31) that refracts the light emitted from the emission surface (12)
Data Source
AI summary
A light diffusion device comprises: an optical transmission cable which transmits a laser beam emitted from a laser oscillator and outputs the transmitted laser beam from an output surface at a leading end thereof; and a covering layer which has a function of absorbing the laser beam and/or a function of diffusing light and which covers the optical transmission cable. The covering layer has a leading end that protrudes in the output direction of light by a length required for cutting off the peripheral portion of said light.