Ultra-Short Fiber Image Inverter Glass Composition for Clear Imaging
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Solution Overview
Problem
The fabrication of fiber optic image inverters with ultra-short twisters faces challenges such as resolution loss, reduced transmittance, and image distortion due to compression of the twisting area, which affects the optical properties and structural integrity, making it difficult to achieve miniaturization and weight reduction for helmet night-vision devices.
Innovation Solution
A specific glass composition for the surrounding fiber is developed, comprising SiO2, Al2O3, B2O3, Li2O, Na2O, K2O, CaO, SrO, ZnO, TiO2, CeO2, MgF2, and CaF2, with controlled refractive index and thermal properties to enhance tensile strength and prevent devitrification, ensuring high resolution and clarity in the fiber optic image inverter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the twisting area of fiber optic image inverter is compressed to reduce height and weight, then miniaturization and weight reduction are achieved, but resolution loss at edge, reduced transmittance, and image distortion occur
Solution Approach 1:
The patent applies parameter changes by precisely controlling the glass composition (adding Al2O3 to 3-7 wt%, B2O3 to 2-8 wt%, and specific amounts of ZnO, TiO2, and rare earth oxides) and processing parameters (heating temperature 1000-1200°C, twisting time 1-10 minutes, twisting speed 1-10 rpm) to achieve the desired balance between miniaturization and optical performance. The composition parameters are optimized to maintain tensile strength and prevent devitrification during the compression process.
Solution Approach 2:
The patent uses composite glass materials with multiple components including SiO2, Al2O3, B2O3, ZnO, TiO2, and rare earth oxides (CeO2, La2O3, Nb2O5, Ta2O5, Gd2O3). This composite composition provides enhanced mechanical strength, controlled refractive index, and resistance to devitrification, enabling the fiber to maintain optical performance during the ultra-short twisting process that reduces height to 15mm or less.
2Length of moving object
If the twisting area is compressed to reduce size, then the height is reduced to 15mm or less, but structural deformation and optical property degradation occur
Solution Approach 1:
The patent changes the material parameters by optimizing glass composition with high Al2O3 (3-7 wt%) and B2O3 (2-8 wt%) content, which significantly increase the strain point temperature and tensile strength. The processing parameters are also optimized: heating temperature 1000-1200°C, twisting time 1-10 minutes, and twisting speed 1-10 rpm. These parameter changes enable the fiber to withstand the compression and maintain structural integrity at ultra-short heights of 15mm or less.
Solution Approach 2:
The composite glass material system combines SiO2 network formers with Al2O3, B2O3, ZnO, TiO2, and rare earth oxides to create a material with enhanced mechanical properties and thermal stability. This composite structure prevents structural deformation during the ultra-short twisting process, maintaining reliability even when height is reduced to 15mm or less through compression.
3Manufacturing precision
If the glass composition is optimized to prevent devitrification and enhance tensile strength, then manufacturing complexity increases, but optical performance is maintained
Solution Approach 1:
The patent optimizes specific composition parameters: Al2O3 (3-7 wt%), B2O3 (2-8 wt%), ZnO (1-3 wt%), TiO2 (0.5-2 wt%), and rare earth oxides (0.1-1 wt% each). These parameter ranges are carefully selected to achieve the desired balance between preventing devitrification, enhancing tensile strength, and controlling refractive index. The processing parameters (heating 1000-1200°C, twisting 1-10 minutes at 1-10 rpm) are also optimized to match the composition.
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 ensures that the fiber optic image inverter with ultra-short twister maintains high resolution and clarity, prevents structural deformation, and facilitates the miniaturization of helmet night-vision devices by reducing weight and size without compromising optical performance.
Implementation Method 1
A specific glass composition for the surrounding fiber is developed, comprising SiO2, Al2O3, B2O3, Li2O, Na2O, K2O, CaO, SrO, ZnO, TiO2, CeO2, MgF2, and CaF2, with controlled refractive index and thermal properties to enhance tensile strength and prevent devitrification
Implementation Method 2
A specific glass composition for the surrounding fiber is developed, comprising SiO2, Al2O3, B2O3, Li2O, Na2O, K2O, CaO, SrO, ZnO, TiO2, CeO2, MgF2, and CaF2, with controlled refractive index and thermal properties
Implementation Method 3
Fiber optic image inverter, as a core optical component in the helmet night-vision device, is a photoelectric imaging component with excellent properties and has characteristics of large numerical aperture, high light-transmission efficiency, high resolution, authentic and clear in image transmission
Data Source
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AI summary
The present application discloses a method for fabricating a fiber optic image inverter with ultra-short twister, and application, belongs to the field of fabrication of fiber optic image transmission elements and solves the problem that the fiber optic image inverter with ultra-short twister is difficult to fabricate. The method includes: drawing a glass rod with a low refractive index and a high strain point temperature into a surrounding pipe fiber; drawing a glass rod with a high refractive index and a high transmittance into a filling glass fiber, and then drawing into a casing pipe absorption fiber; uniformly surrounding an outer side of a cladding glass pipe with the surrounding pipe fiber, and matching a core glass rod and the cladding glass pipe to be drawn into a mono fiber; and then performing fabrication of a multi fiber, fabrication of a multi-multi fiber, heat press fusion and twisting operation in sequence; wherein the heating body in the ultra-short high-temperature twisting heating furnace has a width ranging from 3 mm to 4 mm; and a distance from the heating body of the heating furnace to the surface of a fiber optic image inverter block ranges from 1.0 mm to 2.5 mm, and twisting operation time ranges from 2 minutes to 9 minutes. The fiber optic image inverter with ultra-short twister with a high resolution and a high contrast and clear imaging is obtained and applied in a low-light-level image intensifier.