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PMMA Fibre Optic Harnesses

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  3. End Lit PMMA Harnesses

Our range of standard PMMA end lit harnesses are available in either single or multi-strand configurations. We can also make custom harnesses with larger diameter fibre if required.

Our PMMA fibre products are manufactured from Mitsubishi / ESKA raw fibre. We are an offically authorised supplier of Mitsubishi fibre products.

End lit PMMA fibre comes in two configurations - single sheathed or unsheathed strands of 0.25mm, 0.50mm, 0.75mm, 1mm, 1.5mm or 2mm diameter fibre, or as multiple sheathed strands of 0.75mm fibre.
Single strands of fibre give starry points of light and normally require no termination, whilst multi-stranded varieties are normally terminated with a ferrule to allow the attachment of an end fitting.
Larger diameters are available on request with soft silicone at the ends of the tails for use when articulated fittings are used in a tight space for the fibre bend radius.
Product Datasheet

Fibre Specifications

Core material Polymethyl Methacrylate
Cladding material Fluorinated Polymer
Refractive index 1.49
Numerical aperture 0.5
Refractive index profile Step index
Operation temperature range -55°C to +70°C in low humidity; <60°C at 95% RH (attenuation change is within 10% after 1000 hours except for that due to absorbed water). Please note that fibre can become brittle at lower temperatures.
Sheathing specifications Megolon S540 is a thermoplastic, halogen free cable sheathing compound which exhibits an excellent level of fire retardancy. This product is specifically aimed at designs of cables requiring a good degree of flexibility and the ability to meet the more stringent fire test specifications.
S540 Toxicity Index (DEF STAN 02-713) 0.4
S540 Halogen Acid Gas Evolution (IEC 60754-1) Zero
S540 Flammability Temperature Index (ISO 4589-3) 330°C

Fibre Ordering Codes - Standard Fibre

Code Fibre Size Approx. Active Diameter Approx. Outer Diameter Max No. of Tails Per Light Source* Minimum Bend Radius Termination Types [1]
FSPT-1-25-U CK10 0.25mm unsheathed 8235 10mm none
FSPT-1-50[2] CK20 0.50mm unsheathed/1.09mm 1890 10/15mm none
FSPT-1-75[2] CK30 0.75mm unsheathed/2mm 990 10/15mm none/tube
FSPT-1-1[2] CK40 1mm unsheathed/2.2mm 540 15/20mm crimp/tube
FSPT-1-15[2] CK60 1.5mm unsheathed/2.6mm 225 25/40mm crimp/tube
FSPT-1-2[2] CK80 2mm unsheathed/3mm 135 30/60mm crimp/tube
FSPT-4 4 1.8mm 3.1mm 275 20mm tube
FSPT-7 7 2.4mm 4.4mm 150 25mm 5mm smooth/tube
FSPT-12 12 3.1mm 4.85mm 83 25mm M8/M10/5mm smooth/8mm smooth
FSPT-21 21 4mm 6mm 52 28mm M8/M10/5mm smooth/8mm smooth
FSPT-25 25 4.3mm 6.35mm 44 30mm M8/M10/6mm smooth/8mm smooth
FSPT-33 33 5mm 7.4mm 33 50mm M8/M10/6mm smooth/8mm smooth
FSPT-50 50 6mm 8.7mm 22 60mm M8/M10/6mm smooth/8mm smooth
FSPT-75 75 7.5mm 10.1mm 14 90mm M10/8mm smooth
FSPT-88 88 8mm 10.7mm 12 100mm M10/8mm smooth
FSPT-100 100 8.4mm 11.3mm 11 105mm M10/8mm smooth
STAR28 8 x 1mm
20 x 0.75mm		 5mm 7.75mm 26 50mm None

Fibre Ordering Codes - Special Order Only

These fibre sizes are special order only. At times we may hold stock of them but otherwise they will be manufactured to order.

Code Fibre Size Approx. Active Diameter Approx. Outer Diameter Max No. of Tails Per Light Source* Minimum Bend Radius Termination Types [1]
FSPT-2 2 1.2mm 2.35mm 495 15mm tube
FSPT-3 3 1.5mm 2.7mm 366 18mm tube
FSPT-5 5 2mm 3.7mm 220 20mm 5mm smooth/tube
FSPT-6 6 2.2mm 4.1mm 183 20mm 5mm smooth/tube
FSPT-8 8 2.5mm 4.5mm 135 25mm 5mm smooth/tube

* Note - maximum capacities are stated above. In normal usage we will fill a common end to only 90% of its capacity (or 75% if specified with a Gemini light source). This ensures that a consistent light output is delivered through all fibre tails.

[1] Custom ferrule options are available - please contact us for details.

[2] Codes refer to sheathed product. For unsheathed please suffux code with '-U'.