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TB Glass Capillaries

TB Glass Capillaries are specialized components designed for optical communication, made from high-quality borosilicate glass. They offer exceptional inner diameter precision of ±0.001mm for accurate fiber positioning. These capillaries are capable of housing 3 optical fibers in a precise isosceles triangular arrangement, ensuring optimal alignment. The combination of their excellent physical and chemical properties with high ultraviolet (UV) transmission makes them ideal for securing fibers using UV adhesive. Their similarity to optical fibers in terms of polishing characteristics allows for easy preparation of the necessary optical polishing surfaces for fiber connections. TB Glass Capillaries are widely used in various optical devices, including connectors, joints, and couplers, providing a reliable and efficient solution for optical communication infrastructure.

tb glass capillaries

Specifications of TB Glass Capillaries

TB Glass Capillaries Specification Sheet
Material PropertiesMaterial: Borosilicate Glass
Density: 2.3×10³Kg/m³   CTE: 3.3×10-6cm/cm℃
Compressive Strength: >1.57×108Pa   Young Modulus: 6.76×1010Pa/m2
Softening Point: 820℃   Annealing Point: 560℃   Deformation Point: 520℃
Refractive Index: 1.47
Dielectric Constant: 4.9(@1MHz)    
Dimensions and Tolerances

OD: Φ1.00mm, Φ1.80mm, Φ2.00mm, Φ2.50mm             

 Tolerance: OD±0.005mm, or according to customer requirements.

Isosceles Triangle Inner Hole Side Length W: 0.102×0.102×0.102, 0.162×0.162×0.162, 0.254×0.254×0.254
Side Length Tolerance: W + / - 0.002 mm, or according to customer requirements.
Length: 5mm, 7mm, 15mm, 20mm                                  
Tolerance: L±0.2mm, or according to customer requirements.
Cone Diameter: Φ0.5±0.15mm, Φ1±0.25mm, or according to customer requirements.
Cone Depth: 0.5~1.5mm, 1~2.5mm, or according to customer requirements.
Surface QualityThe cylindrical surface of the product is transparent. The product has no cracks, appearance and surface condition can be made according to customer requirements.
Can be customized according to customer requirements.

Dimension Drawing of TB Glass Capillaries

Dimension Drawing of TB Glass Capillaries

Features of TB Glass Capillaries

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

  • Properties: The glass capillary is melted and drawn at high temperature. The surface is transparent, which eliminates hidden micro-cracks on the surface. It is not easy to crack and break when dispensing glue to fix the optical fiber, and the dispensing qualification rate is high.

  • The glass capillary is transparent and has high UV transmission characteristics. The capillary tube and 2/3/4 optical fibers can be quickly cured and bonded with UV adhesive to fix and position the optical fibers.

  • Environmental performance: 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 double microhole glass capillary is accurately made through a CNC drawing tower. The optical fiber has high dimensional tolerance and positioning accuracy. The double capillary holes can install two optical fibers for precise positioning, and can precisely control the center distance between the two optical fibers.

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