HWB Series IR Cut‑Off Filters for Night Vision
HWB Series IR Cut‑Off Filters for Night VisionThe HWB Series Ir Filter are colored glass longpass optical filters that transmit infrared (IR) light while blocking visible light. These filters are specifically engineered to deliver a clear IR-only channel for camera systems. By positioning the spectral edge within the infrared range (e.g., HWB760/780/800/830/850/930), they effectively suppress unwanted visible wavelengths while allowing transmission in the 850–940 nm range. This enables night-vision LEDs or VCSELs to reach the sensor with enhanced signal-to-noise ratio (SNR) and improved image contrast.In true day/night imaging systems, the HWB filter functions as a robust front window for the night vision path, while a UV/IR cut filter is employed in the daytime color path to preserve accurate color reproduction. A motorized IR-cut filter mechanism facilitates seamless switching between these two operational modes. As absorptive black glass filters, HWB Series filters exhibit min…
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