Shortpass / NIR Cut Filters
Shortpass Filters are also known as “IR-cut” filters and are specifically designed to pass a broad spectrum of shorter wavelength light, while blocking longer VIS and NIR wavelengths.
Designed to have a sharp transition between shorter wavelengths (which are passed) and longer wavelengths (which are blocked) Peak transmission =90%* Can be used with Longpass Filters for a custom, fine-tuned Bandpass Filter Anti-reflection coated for maximum transmission Exceptional surface quality: 40/20 scratch/dig Available in wavelength ranges from 340 nm to 785 nm *Peak Transmission SP701 = 85% and SP705 = 88%
SP SERIES – VIS PASS: Separate colors in monochrome or color applications Improve contrast and resolution
SP SERIES – NEAR-IR BLOCK: Commonly placed over the camera’s image sensor to block NIR light and achieve natural color rendition Used as a hot mirror to reduce unwanted heat build-up caused by infrared radiation
MOUNT AND SIZE OPTIONS: Shortpass Filters are in-stock and ready-to-ship, and are available in threaded mounts, sizes M13.25 to M105; 25.4™ C-mounts; slip mounts; or unmounted. Shortpass Filters can be optically cemented behind a M12 lens if preferred, while custom shapes and sizes are also available.
APPLICATIONS: Shortpass Filters are commonly used in color imaging to achieve natural color rendering. They can also be used to protect the sensor for NIR laser damage or to reduce IR radiation or “camera bloom” created during hot metal or glass extrusion processes.
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