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300-860nm Long-Wave Pass Linear Gradient Filter
The long-wave-pass linear gradient filter employs a continuous coating process and achieves spatially continuous variation in optical filtering characteristics based on a multi-layer wedge-shaped thin-film structure. By adjusting the film slope according to dispersion requirements, it is possible to obtain the desired linear variation rate. With its highly integrated spectral separation capability, the linear gradient filter offers irreplaceable advantages in the miniaturization and lightweight design of spectroscopic instruments. These products are widely used in lightweight hyperspectral imaging spectrometers, portable spectrometers, and medical endoscopes.
- Product Description
- Parameter Introduction
- Precautions
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Product Performance
Type Long-wave pass linear gradient filter Performance parameters Spectral range 300-860nm Peak transmittance ≥92% Linear rate of change 21.5nm/mm Out-of-band cutoff frequency ≥OD3 Filtering method Long-pass filter, uniform gradient Gradient method Start the gradient along the long side at 13 nm. Overall dimensions 38mm × 10mm × 1mm Effective size of the gradient region 26mm × 10mm × 1mm Spectral curve

Application areas
1. Lightweight Hyperspectral Imager
2. Portable Spectrometer
3. Medical endoscopes
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