Cat No:FLPF-0006
A Long-wave Pass Filter is an optical filter designed to transmit wavelengths longer than a specified cutoff wavelength while blocking shorter wavelengths. By using precision thin-film coatings or colored glass substrates, these filters provide sharp spectral transitions and stable transmission performance. Long-wave pass filters are commonly used for spectral separation, stray-light suppression, and background noise reduction in optical systems.
| Feature | Defined cutoff wavelength with high transmission above the passband Effective blocking of short-wavelength light to reduce background noise Sharp spectral edge for precise wavelength discrimination High optical stability with durable coating performance Available across UV, visible, and infrared ranges Customizable options for cutoff wavelength, substrate material, size, and coating specifications |
| CWL (nm) | 400 nm |
| RoHS | Compliant |
| Transmission Band | 540~2000 nm |
| Blocking | 200~510 nm |
| Diameter (mm) | 12.50; 25.00; 50.00 |
| Material | UV Fused silica |
| TWE | λ/4@633 nm |
| Surface Quality | 60/40 |
| Dia. Tolerance (mm) | +0.0/-0.1 |
| Thickness (mm) | 2±0.2 |
| Central Wavelength (λc) | Wavelength where T=50%Tmax |
| Transmission | Tavg>90% |
| Depth of Blocking | OD4 |
| Edge Steepness | (λ(T80%) -λ(T10%))/λ(T10%) *100% |
| AOI | 0° |
| Clear Aperture | >90% |
| Application | Fluorescence microscopy and bioimaging systems Spectroscopy and optical measurement instruments Laser systems for wavelength selection and cleanup Imaging systems requiring infrared or red-light transmission Scientific research, analytical instrumentation, and industrial optics |
Eata Ray is your trusted partner for high-precision optoelectronic components, integrated processing services and comprehensive testing solutions—driving your innovation forward, every step of the way.
For Research or Industrial Raw Materials, Not For Personal Medical Use!
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