LP690 Longpass Filter (T>90%@700-1100nm, OD2@350-680nm)

High-Performance LP690 Longpass Filter - Red to Near-Infrared Optical Filtering

The LP690 Longpass Filter delivers exceptional optical performance for demanding red-to-near-infrared applications. With excellent 90% transmission efficiency and effective OD2 blocking, this filter is engineered for advanced optical systems requiring precise wavelength separation in the 690nm range.

Technical Specifications:

• Cut-on Wavelength: 690nm (T=50%)
• High Transmission: T>90% @ 700-1100nm
• Effective Blocking: OD2 @ 350-680nm

Key Applications:

• Far-Red Fluorescence Microscopy: Perfect for far-red fluorophore imaging
• Confocal Microscopy: Ideal for red channel detection in multi-color systems
• Flow Cytometry: Optimal for far-red fluorescent protein detection
• Biomedical Imaging: Excellent for deep tissue penetration studies
• Laser Applications: Effective filtering for 633nm and 647nm laser systems
• Spectroscopy: Precise red-to-NIR wavelength discrimination

Performance Features:

• Sharp transition edge for precise 690nm cutoff
• High 90% transmission minimizes signal loss
• OD2 blocking provides reliable background suppression
• Optimized for red-to-near-infrared spectrum (700-1100nm)
• Consistent performance across filter aperture
• Low autofluorescence for sensitive detection
• Stable performance under intense illumination

Technical Advantages:

• Red-NIR Optimized: Specifically designed for far-red applications
• Reliable Performance: Consistent transmission in critical wavelength range
• Research Grade: Professional quality for scientific applications
• Cost-Effective: Balanced performance for practical applications

Application Areas:

• Life Sciences: Far-red fluorescence imaging and detection
• Medical Diagnostics: Non-invasive imaging and analysis
• Industrial Inspection: Quality control and material analysis
• Research: Advanced optical characterization studies

Quality & Reliability:

• Professional optical coatings for consistent performance
• Quality control testing ensures specification compliance
• Compatible with standard optical mounts and filter holders
• Suitable for both research and industrial applications
• Designed for high-intensity laser environments

Perfect for: Far-red fluorescence microscopy, biomedical imaging, laser applications, and optical systems requiring reliable red-to-near-infrared filtering with excellent transmission efficiency.