The Oriel 77501 Fiber Optic Illuminator is a VIS-NIR broadband light source engineered for coupling stable illumination into fiber bundles and liquid light guides. Built around a 100 W quartz tungsten halogen lamp with a 2.3 × 4.2 mm filament, the unit delivers consistent output across the visible and near-infrared spectrum. An aspheric collection lens and plano-convex re-imaging optics create an F/1.5 optical system with a 6.0 mm spot size at the fiber interface.
Technical Specifications
• Light source: 100 W QTH lamp, adjustable 9–12 VDC
• Spectral range: VIS-NIR
• Lamp filament: 2.3 × 4.2 mm
• Lamp life: Average 50 hours (replaceable)
• Optical performance: F/1.5; 6.0 mm spot size
• Light ripple: 0.1% pk-to-pk at 100/120 Hz
• Line regulation: ±0.5% output change for ±10% line voltage variation
• Input power: 100–130 VAC, 60 Hz @ 1.5 A or 200–260 VAC, 50 Hz @ 0.75 A
– Key Features
• Adjustable iris for intensity control without color temperature shift
• Manual shutter for zero reference measurements with radiometers
• Built-in voltmeter for repeatable voltage set points
• Filter holder: Accepts 25.4 mm (1-inch) diameter filters up to 9.5 mm thick; accommodates up to three 1/8-inch filters or equivalent combinations
• Self-contained enclosure with pre-aligned lamp mount and fiber holder
• Accepts 11 mm ferrule-terminated Oriel fiber at 0.5-inch interface opening
– Typical Applications
• Radiometric measurements requiring stable, broadband illumination
• Spectroscopic analysis with fiber-coupled sample delivery
• Illumination of large-core fiber bundles and liquid light guides
– Compatibility & Integration
Designed for Oriel fiber cables with 11 mm ferrules (sold separately). Not recommended for small core fibers due to 6.0 mm spot size. Supports standard 1-inch optical filter formats.
