Optical Fiber Lamp

Quick Answer: The Optical Fiber Lamp is a cold light source that sends light from a lamp in a bench housing through flexible optical fiber guides to the specimen. An optical fiber lamp gives bright, positionable light without heating what is being viewed.

How a Fiber Lamp Keeps Specimens Cool

Every lamp turns part of its power into heat. In this design the bulb and its heat stay inside the housing on the bench, while a bundle of glass fibres carries the light to wherever it is aimed. Each fibre guides light along its length by total internal reflection, the principle demonstrated in physics lessons with a curved acrylic rod. The light leaving the end of the guide carries very little heat, which suits living organisms, wax specimens and moist dissections.

Fiber lamps are commonly used with one or two flexible guides, or with a ring guide that clamps around a stereo microscope lens. The listing does not say which guides come with this unit or what lamp sits in the housing, so confirm both at enquiry. For pinpoint light in very small spaces, see the Fibre Optic Micro Probe Illumination System.

The lamp is also a useful teaching object in its own right. Students can see total internal reflection at work by looking at the lit end of a guide, a direct link to optical fibre communication in the physics syllabus and to the Light & Optics range.

Applications

• Cool lighting of living insects, larvae and aquatic animals under a stereo microscope
• Dissection work where tissues must not dry out under the light
• Lighting small parts and surfaces for inspection or photography
• Demonstrating total internal reflection in physics lessons

Specifications

Care & Handling

• Coil the optical fiber lamp’s guides in large, loose loops; tight bends and crushing break the fibres.
• Keep the guide ends and the output port free of dust, which cuts brightness and can scorch at the port.
• Leave space around the housing for ventilation, and if a fan is fitted, let it run until the unit cools.
• Replace the lamp only with the type specified for the unit.

Why Choose LabEquip

Biology departments working with live material, entomology and aquatic labs, and inspection workshops choose fiber lamps for cool, flexible light. The lamp is part of the Microscope & Optics range; tell LabEquip about your microscope and specimens on the contact page.

Frequently Asked Questions

Is the light from a fiber lamp really cold?

It is much cooler at the specimen than a halogen lamp head at the same distance, because the heat stays in the housing and the fibres carry mainly visible light. Some warmth can still be felt at very close range with a bright source.

Can I use the fiber lamp for oblique lighting?

Yes. Point a flexible guide at a low angle to the specimen to show surface texture, and add a second guide from the other side to soften the shadows.

Why are there dark spots in the light beam?

Dark spots usually mean broken fibres in the guide, caused by sharp bends or crushing. A few broken fibres reduce brightness slightly; many mean the guide needs replacing.

Does the colour of the light matter?

For viewing it rarely matters, but for photography set the camera’s white balance to the lamp. Halogen-based fiber sources give warm light, while LED-based units are cooler in tone.

Can the lamp run through long practicals?

Yes, fiber sources are designed for long sessions. Keep the vents clear, and switch off between groups to extend the life of the lamp.

How does this lamp differ from the micro probe system?

Both carry light through fibre guides. The micro probe system ends in fine probes for pinpoint light in small spaces, while this lamp is used to light a wider field around the specimen.

Last Updated: September 2026