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Iron-Chromium Foil (Light Tight) (Fe95-Cr5)
Available Configurations
Properties common to all products in this list
Key Features
Iron/Chromium Foil (Light Tight) (Fe95/Cr5) is a pinhole-free certified iron-chromium alloy foil combining the high structural integrity and ferromagnetic character of a predominantly iron composition with moderate chromium-enhanced oxidation resistance and guaranteed through-thickness optical barrier integrity:
Pinhole-Free Certification
Each batch is tested and certified clear of through-thickness defects, ensuring reliable complete optical isolation in photon-sensitive instruments, vacuum chambers, and imaging systems where stray light must be completely eliminated to achieve valid measurement results.
High Structural Integrity
The predominantly iron composition provides good tensile strength and stiffness for a thin metallic foil, allowing the Fe95/Cr5 light-tight foil to be integrated into rigid enclosure structures that maintain their form and barrier continuity under mechanical handling and service loads.
Chromium-Enhanced Oxidation Resistance
The 5% chromium addition provides moderate improvement in oxidation resistance over unalloyed iron foil, reducing the rate of surface oxidation that could eventually compromise barrier integrity or generate particulate contamination in enclosed optical or electronic assemblies.
Strong Ferromagnetic Character
The Fe95/Cr5 composition has strong ferromagnetic character, making this light-tight foil suitable for applications requiring simultaneous magnetic shielding and optical isolation in instrument enclosures where both electromagnetic and optical isolation are design requirements.
Ease of Integration into Enclosures and Vacuum Systems
The machinable and formable character of the Fe95/Cr5 alloy foil supports precision cutting, shaping, and integration into optical instrument enclosures, spectrometer housings, and vacuum chamber linings, with the certified pinhole-free barrier maintained through these fabrication operations.
Industrial Applications
Iron/Chromium Foil (Light Tight) (Fe95/Cr5) is used wherever pinhole-free optical barrier integrity must be combined with the structural strength and strong ferromagnetic character of the high-iron Fe95/Cr5 composition:
- ✦ Aerospace Optical Housings and Spectrometer Linings
- Used for aerospace optical housings and protective linings for spectrometers, where the structural integrity of the iron-rich alloy provides robust enclosure construction and the certified pinhole-free barrier ensures complete stray light exclusion from the optical path and detector assembly.
- ✦ Shielding for Microscopy Setups Requiring Optical Isolation
- Applied as shielding for microscopy setups requiring complete optical isolation, where the formable character of the Fe95/Cr5 foil allows precise shaping to match microscope stage and detector geometries while maintaining certified through-thickness barrier continuity.
- ✦ Photodetector Isolation in Vacuum Chambers
- Used for photodetector isolation in vacuum chambers and particle physics instrumentation, where the certified optical barrier prevents ambient photon contamination of detector signals.
- ✦ Calibration of Light-Sensitive Instruments and Controlled Optical Testing
- Applied for calibration of light-sensitive instruments and controlled optical testing, where a guaranteed optical background exclusion foil allows reliable separation of instrument dark current, electronic noise, and genuine signal.
- ✦ Photodetector Isolation, Imaging Shielding and Optical Barrier Research
- Provides certified barrier foil for photodetector isolation experiments, imaging system shielding studies, and research into optical barrier performance of metallic foil products in demanding optical laboratory environments.
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Linear dimension | <100mm | ±1mm |
| Linear dimension | >=100mm | +2 / -1% |