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Half Round Rods

Half Round Rods serve as vital components in the optical communication sector, characterized by their exceptional precision, robust hardness, and outstanding resistance to environmental conditions. These rods find extensive application across a range of optical devices, including optical couplers, ribbon fiber welding protectors, and high-power lasers. The production process involves prefabricating a glass rod, which is then meticulously cleaned and positioned above a high-temperature graphite furnace. Within this controlled environment, shielded by inert gas, the rod undergoes a series of programmed steps such as continuous pulling, drawing, and cutting. This method facilitates the swift and efficient fabrication of half-round glass rods with transparent surfaces and precise dimensional accuracy, making it highly suitable for large-scale production. By optimizing for mass production, this approach not only significantly reduces the costs associated with these components but also markedly enhances their overall quality, offering a balanced solution for the demanding needs of the optical communication industry.

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half round rods

Specification of Half Round Rods

Half Round Rods product parameter table
ProjectIndicator requirements
Material propertiesMaterial: Borosilicate Glass
Density: 2.3×10³Kg/m³ Thermal expansion coefficient: 3.3×10-6cm/cm℃
Compressive strength: >1.57×108Pa Young’s modulus 6.76×1010Pa/m2
Softening point: 820℃ Annealing point: 560℃ Deformation point: 520℃
Refractive index: 1.47
Dielectric constant: 4.9(@1MHz)
Dimensional accuracyOuter diameter OD: φ0.5≤OD≤φ10mm
Width:W±0.1mm according to customer requirements.
Height:H±0.05mm according to customer requirements.
Arc Angle R: High temperature drawing process rounded angle, R < 0.1mm.
Length L: L=0.5~100mm±0.2mm, the length can be processed according to customer requirements
Surface requirementsThe product has no cracks, both end surfaces are ground surfaces, and the cylindrical surface is transparent.

Dimension Drawing of Half Round Rods

Dimension Drawing of Half Round Rods

Features of Half Round Rods

Features of Half Round Rods
  • Material: Borosilicate Glass, silica (SiO2) content 80%, softening point >800°C, high strength, high hardness, high light transmittance.

  • Usage Properties: The half round glass rod is made of warm melted wire drawing. The surface is transparent, which eliminates local hidden micro-cracks on the surface. It is not easy to crack and break when dispensing and fixing, and the dispensing qualification rate is high.

  • High UV Transmission: The half round glass rod is transparent and has high UV transmission characteristics. Optical devices can be quickly cured and bonded with UV adhesive, and optical devices can be quickly fixed, positioned.

  • Environmental Properties: The production process does not use any chemical solvents, and the materials and production process do not contain or involve substances controlled by the European Union.

  • High Dimensional Accuracy: The half round glass rods of various inner hole shapes and structures are precisely made through CNC drawing tower, and the inner and outer diameter dimensional accuracy is high.

  • Customized Structure: Using high-precision CNC machine tools to finely grind the glass tube, various structures can be customized to meet the requirements for fixing and connecting optical devices.

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