The OPTOStokes ND90% is a precision light attenuation filter designed for applications requiring minimal signal reduction (Optical Density ≈ 0.05). It offers exceptional spectral flatness across the 350nm to 1100nm range, functioning as a high transmission filter that maintains the integrity of the original spectrum while providing professional-grade light control.
Technical Specifications
| Parameter | Specification Detail |
|---|---|
| Wavelength Range | 350nm to 1100nm |
| Transmittance (T) | 90% ± 3% |
| Optical Density (OD) | 0.046 |
| Thickness | 1.1mm |
| Surface Quality | 60/40 S/D |
| Application Type | Laser Flat Window / Light Balancer |
| Product ID | 20800376 |
Key Engineering Applications
This ND90% filter is engineered for precision optics systems where slight exposure adjustment is paramount:
Multi-Sensor Calibration: Balances the throughput of multiple imaging channels to ensure consistent exposure levels across arrays.
Protective Optical Windows: Acts as a durable 1.1mm window protecting expensive sensors from dust and humidity while providing 10% attenuation.
Ghosting Reduction: Helps in reducing internal reflections and flare in high-sensitivity laser modules.
Industrial Vision: Fine-tunes light intensity in machine vision setups using LED or halogen sources.
Customization & OEM Excellence
OPTOStokes specializes in OEM production, offering the ND90% series in various formats beyond the standard 1.1mm thickness. We provide custom CNC sizing (round, square, or complex geometries), edge blackening to reduce stray light, and specialized AR coatings to enhance performance at specific laser lines. Our large inventory ensures rapid turnaround for R&D and mass production.
Frequently Asked Questions
Q: Why use an ND90% filter instead of a standard clear window?
A: A standard clear window often has around 92% transmission due to Fresnel reflection. The ND90% is specifically calibrated to provide a controlled, spectrally flat 90% transmission, making it a reliable tool for systems that require a known, consistent light reduction of 10%.
Inquiry & Technical Support
Looking for high-precision light control solutions? OPTOStokes provides tested, high-quality ND filters with guaranteed batch consistency. For volume pricing or custom spectral data, contact our engineering team: [email protected].
