Gradient filters, also referred to as graduated optical filters, are designed with transmission characteristics that vary continuously across the clear aperture.Unlike conventional optical filters with uniform spectral performance over the entire surface, gradient filters provide spatially dependent control of light intensity and/or wavelength response, enabling precise optical compensation and advanced system-level optimization.By combining precision thin-film coating technologies with controlled gradient designs, LUMINA delivers custom gradient filter solutions for demanding industrial, scientific, and imaging applications.
Available Gradient Filter Designs
·Gradient Neutral Density (ND) Filters
—Spatially varying attenuation with spectrally neutral behavior
·Linear Variable Bandpass Filters
—Center wavelength varies as a function of position
·Linear Variable Longpass or Shortpass Filters
—Cut-on wavelength varies linearly along the filter length
·Gradient Dichroic Filters
—Spatially varying reflection and transmission characteristics (upon request)
All gradient filter designs are application-specific and can be fully customized.
