Cut-off filters of from near UV to medium infrared are available.
Broadband filter and narrowband filter (Δ ∧ h / λ c <15%), divided so according to the central wavelength and bandwidth ratio.
Peak transmittance and central wavelength λ c is related to semi-width Δ ∧ h.
Central wavelength deviation
Substrate may be tailed to customers' request or be provided by customers.