690nm Narrow Bandpass Filter | CWL 690±2nm, FWHM 10±2nm, 1.0mm Thickness

690nm Narrow Bandpass Filter | CWL 690±2nm, FWHM 10±2nm, 1.0mm Thickness

This precision 690nm narrow bandpass filter is engineered for 0 degree angle of incidence, delivering peak transmission greater than 90 percent at the target wavelength while providing robust out-of-band rejection across a broad spectral range. As a high-performance offering in our bandpass filters portfolio, it is designed to isolate precise spectral signals and suppress unwanted stray light, making it ideal for demanding optical detection and imaging systems. OPTOStokes maintains an extensive in-stock selection of standard specifications, alongside full custom coating services to match the exact requirements of your optical assembly.

Technical Specifications

Applications

This 690nm bandpass filter is widely deployed across industrial and commercial optical systems. Typical use cases include barcode scanning, iris recognition systems, infrared touch panels, and photoelectric sensors, where clean spectral isolation directly improves detection accuracy and system reliability. Its consistent optical density performance across the full blocking range ensures stable signal-to-noise ratio even in high ambient light environments, reducing false readings and improving overall system performance. The filter is also suitable for integration into portable analytical instruments and industrial inspection equipment that requires precise wavelength control.

Customization & Service

OPTOStokes supports full customization to fit your mechanical and optical design needs. Available form factors include round, square, and custom irregular shapes, with optional mounted retainer rings for easy assembly. All products are manufactured using precision thin film coating technology for uniform spectral performance and long-term environmental stability. We maintain a large inventory of standard filters for fast shipment, and our custom coating service delivers world-class quality with reliable lead times to keep your project on schedule.

Pain Points & CTA

Many engineering and procurement teams face common challenges such as extended lead times for custom optics, limited technical support during specification selection, and inconsistent coating quality across production batches. OPTOStokes addresses these issues by combining ready-to-ship standard inventory, flexible custom manufacturing capabilities, and direct technical support from optical coating experts. If you need a tailored solution or want to confirm stock availability for your project, send your specifications and drawings to sales@optofilters.com or submit an inquiry through our website. Our team will respond with a detailed quotation and technical guidance promptly.