SP425 Shortpass Filter | 320-415nm Passband, OD5 Blocking

SP425 Shortpass Filter | 320-415nm Passband, OD5 Blocking

The SP425 Shortpass Filter is engineered for optical systems requiring high transmission in the ultraviolet and near-ultraviolet spectrum while delivering deep light attenuation in the visible and near-infrared regions. Designed for precision optical instrumentation, this filter provides a high average transmission of Tave > 90% across the 320-415nm band and robust out-of-band rejection of Optical Density (OD) > 5 from 440nm to 850nm at 0 degree Angle of Incidence (AOI). As part of our comprehensive range of Shortpass Filters, the SP425 ensures minimal stray light interference and superior signal-to-noise ratio in critical photonics applications.

Technical Specifications

Applications

The SP425 filter is widely deployed across specialized optical and optoelectronic setups requiring selective spectral isolation:

• Ultraviolet Optical Instrumentation: Essential for spectroscopy, fluorescence excitation, and analytical equipment requiring sharp cut-off precision.

• UV Light Source Systems: Ideal for isolating unwanted visible and NIR radiation from UV lamps or LED illumination sources to prevent thermal buildup and sensor noise.

• Machine Vision & Sensing: Enhances contrast in imaging platforms where stray light above 440nm must be blocked cleanly.

Customization & Engineering Services

At OPTOStokes, we maintain an extensive inventory of standardized Optical Filters for immediate prototyping and rapid deployment. Recognizing that every optical system presents unique mechanical and spectral constraints, we provide complete engineering support and flexible manufacturing for custom requirements:

• Custom Geometry: Circular, rectangular, square, or custom CNC-machined shapes.

• Mounting Options: Unmounted substrate options or pre-assembled metal threaded cell mounts.

• Substrate Thickness & Aperture: Customized substrate sizing to meet specific housing requirements.

• Custom Optical Coatings: Modified cut-off slopes, altered AOI optimizations, and specialized environmental durability coatings.

Technical Support & Inquiry

Prototyping delays and inconsistent coating performance can disrupt critical development schedules. OPTOStokes combines rigorous quality assurance with streamlined production to ensure predictable lead times and batch-to-batch repeatability. Contact our engineering team directly at sales@optofilters.com or submit your custom specifications through our website inquiry form to receive technical support and pricing within 24 hours.