Micro Capillary™
Micro Capillary™ is used as optic connector, fiber optic splice, and support for fiber optic connections in optical devices. Its polishing property is similar to that of silica optical glass fiber, making it easy to achieve the high-quality polished surface required for connecting to a PC. It is ideal for components in optical systems with stringent return loss requirements, such as high-speed analog communication devices in CATV systems. Micro Capillary can be fixed to optical fibers, lenses, and holders using UV-curable adhesives. It is also available in additional types, such as the “sheath-retaining type,” which can be inserted up to the sheath of the optical fiber, and the “precision glass tube type,” which can be used as an external mantle.
Features
-
Excellent polishing processability
-
Smooth edge cone shape
-
High UV light transmission
-
High chemical durability
Properties
| Properties/Glass | Borosilicate glass | ||
|---|---|---|---|
| Coefficient of thermal expansion | 30-380℃ | ×10-7/K | 51 |
| Density | ×103kg/m3 | 2.36 | |
| Refractive index (nd) | 1.49 | ||
| Vickers hardness | Hv | 680 | |
| Alkali elution | JIS R3502 | R2O mg | 0.05 |
| Dielectric constant | 1MHz, 25℃ | 5.6 | |
| tan δ | 1MHz, 25℃ | ×10-4 | 85 |
Transmittance
Example of Dimensional Standards
| Nominal size (O.D. × I.D. × Total length) | Edge shape | Outer diameter | Outer diameter roundness | Inner diameter tolerance | Inner diameter roundness | Concentricity | Total length tolerance |
|---|---|---|---|---|---|---|---|
| 0.99×0.127×7.0 | One end cone | ±0.005 | 0.001 | +0.001 -0 |
0.001 | Φ0.001 | ±0.2 |
| 1.80×0.126×15.0 | Both end cone | ±0.005 | 0.001 | +0.001 -0 |
0.001 | Φ0.003 | ±0.2 |
| 1.80×1.010×8.0 | High-precision glass tube | ±0.010 | 0.001 | ±0.005 | 0.001 | Φ0.005 | ±0.2 |
| 2.78×1.805×8.0 | High-precision glass tube | ±0.030 | 0.002 | +0.001 -0 |
0.002 | Φ0.005 | ±0.2 |
