SP640 Shortpass Filter | CWL 640nm, High OD Blocking

SP640 Shortpass Filter | CWL 640nm, High OD Blocking

The SP640 is a precision shortpass filter manufactured by OPTOStokes, engineered for accurate wavelength selection in demanding optical systems. Featuring advanced thin-film interference coating technology, this filter delivers over 90% average transmission across the 400–630nm spectral range, with a sharp 50% cut-off at 640nm ±5nm. It provides reliable optical density blocking greater than 2 across the 350–1100nm range, ensuring robust out-of-band rejection for sensitive detection setups. Optimized for both collimated and slightly convergent light paths, it serves as a versatile solution for R&D prototyping and high-volume OEM integration.

Technical Specifications

Applications

This 640nm shortpass filter is widely deployed in analytical instruments, machine vision systems, industrial inspection equipment, spectrophotometry, and general optical testing setups. Its consistent spectral performance and durable construction make it suitable for OEM integration, prototype development, and replacement part applications where precise short-pass wavelength control is critical to system accuracy.

Customization & Service

OPTOStokes supports full customization for the SP640 filter, including custom substrate dimensions, shape modifications (circular, square, or irregular geometries), and mounting ring assemblies. Our thin film coating processes deliver world-class precision and long-term durability. We maintain an extensive in-stock selection of standard filters for fast delivery, and offer reliable lead times for custom volume orders with guaranteed quality standards.

Support & Inquiry

Optical engineering and procurement teams often face challenges with extended lead times, inconsistent coating performance, and limited technical support for custom filter requirements. OPTOStokes addresses these pain points with responsive engineering support, flexible production capabilities, and a large inventory of ready-to-ship standard filters. For custom specifications, volume pricing, or application guidance, contact our optical experts at sales@optofilters.com or submit an inquiry directly through our website.