Products Description
BP690nm Bandpass Filter | FWHM 110nm, 1.0mm Thickness
The OPTOStokes BP690-110nm precision bandpass filter is engineered specifically for advanced optical sensing, plant physiology research, and biomedical instrumentation. Featuring a center wavelength of 690nm and a wide 110nm full width at half maximum, this high-performance NIR filter delivers exceptional signal-to-background contrast and exceptional durability under demanding operational conditions.

Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | BP690-110nm |
| Center Wavelength (CWL) | 690 ± 5 nm |
| Full Width at Half Maximum (FWHM) | 110 ± 5 nm |
| Transmission Range | 645 - 730 nm (T > 90%) |
| Blocking Range (OD) | 350 - 1100 nm (OD > 2) |
| Angle of Incidence (AOI) | 0 degrees |
| Substrate Thickness | 1.0 mm |
Applications
Designed to meet the stringent requirements of scientific instruments and industrial optical systems, this 690nm filter is widely integrated into plant photosynthesis monitors, chlorophyll fluorescence detection devices, and multi-spectral imaging systems. By isolating precise spectral bands with superior blocking performance, it ensures accurate quantitative analysis and reliable data acquisition across diverse research and commercial platforms.
Customization & Manufacturing Service
As a premier provider of optical filters, OPTOStokes maintains an extensive in-stock inventory for rapid prototyping and immediate dispatch. We support flexible custom manufacturing, including custom geometric shapes (square, round, and irregular profiles) and specialized mounting rings tailored to your optical assembly requirements. Every batch undergoes rigorous spectrophotometric testing to guarantee world-class quality and consistent lot-to-lot performance.
Technical Support & Inquiry
Navigating tight project schedules or complex optical specifications requires responsive engineering support and reliable lead times. Partner with OPTOStokes to eliminate supply chain friction and secure precision optics built to exact tolerances. For custom dimensions, bulk volume quotations, or technical consultations, reach out directly to our engineering sales team at sales@optofilters.com or submit your drawings via our website RFQ form.
Tags: optical filters bandpass filter NIR filter 690nm filter BP690nm chlorophyll filter