Optical filter
Kurokesu optical filters are designed to control how much visible and infrared light reaches the camera sensor. They cover the two essential categories: IR-cut filters, which transmit visible light (approximately 400-650nm) while blocking infrared, and NIR long-pass filters, which block the visible spectrum and transmit near-infrared wavelengths (typically above 850 nm). This allows the same camera platform to be configured either for accurate color imaging or for IR-only operation in low-light and specialized applications. Filters are available in two mechanical formats. Bare D19 round disks are used inside C1 cameras and D25.4mm filters are used in C2/C3/CSI2 cameras.
Screw in low profile IR-CUT filter for CS and C-mount cameras
Kurokesu screw-in optical filters are designed for CS and C-mount lenses, providing a simple way to control the camera’s spectral response without modifying the lens mount or the camera body. They use a low profile 19×1mm glass element with low profile Aluminum frame that threads directly into the camera body. Two spectral options are available. The IR-cut (visible-pass) version transmits the 400-650nm visible range while blocking infrared, ensuring accurate color reproduction under daylight or artificial lighting. The NIR long-pass version blocks the visible spectrum and transmits near-infrared wavelengths above ~850 nm, enabling IR-only imaging for night vision, low-light inspection or machine-vision tasks that require controlled illumination. These screw-in filters offer a quick, mechanical way to switch between visible and IR-only operation and are compatible with most CS/C-mount lenses.