620nm Longpass Filter | Over 90% Transmission, 0.55mm HB600 Substrate

Engineered for precision optical systems, the OPTOStokes 620nm longpass filter is coated on durable HB600 substrate with a 0.55mm thin profile for compact system integration. This filter delivers greater than 90% average transmission across the 620–1100nm spectral range, while blocking visible wavelengths from 350nm to 500nm at less than 1% transmittance. As a leading supplier of Longpass Filters, we design each unit to meet strict coating uniformity standards, making it ideal for demanding NIR detection and imaging applications.

Technical Specifications

Typical Applications

This 620nm longpass filter is optimized for a wide range of industrial and scientific optical systems. Key application areas include:

• Machine vision and industrial inspection systems

• NIR imaging and detection setups

• Analytical instrumentation and spectral analysis

• Laser system beam conditioning

• Biomedical imaging and fluorescence detection

For wavelength-specific system design, our portfolio of NIR Filters provides matched solutions across the near-infrared spectrum to support full optical chain integration.

Customization & Service Support

OPTOStokes provides flexible customization options to align with your exact system requirements. Available modifications include custom dimensions in circular, square, and irregular shapes, mounting ring assembly, and adjusted spectral profiles for specialized use cases.

We maintain an extensive in-stock selection of standard optical filters for fast turnaround, with world-class coating precision and reliable, predictable lead times. Our engineering team offers full technical support for prototype validation, OEM integration, and volume production planning, ensuring consistent performance across every batch. All our filters are manufactured to deliver High Transmission and stable blocking performance over long service life.

Why Choose OPTOStokes

Many R&D engineers and procurement managers struggle with extended lead times, inconsistent coating quality, and limited technical support when sourcing specialty optical filters. At OPTOStokes, we address these common pain points with ready-to-ship in-stock inventory, rigorous quality control protocols, and dedicated engineering support from initial specification to full production.

For custom quotes, technical consultation, or sample requests, contact our optical filter specialists at sales@optofilters.com or submit an inquiry directly through our website. We respond promptly to help you select the optimal filter solution for your project.