SP690 Shortpass Filter (T＞90%@420-685nm, OD3@710-1100nm)

SP690 Shortpass Filter - Reliable Visible Light Performance

The SP690 Shortpass Filter offers excellent optical performance with high transmission across the visible spectrum and reliable OD3 blocking, making it ideal for applications requiring precise deep-red wavelength control and effective near-infrared rejection.

Key Specifications:

• Cut-off Wavelength: 690nm (T=50%)
• High Transmission Range: T>90% @ 420-685nm
• Reliable Blocking Range: OD3 @ 710-1100nm
• Optical Density: >1000:1 blocking ratio
• Transmission Bandwidth: 265nm visible range coverage

Applications & Benefits:

• Deep Red Spectroscopy: Perfect for analyzing deep red wavelengths while blocking NIR interference
• Ruby Laser Applications: Blocks 694nm ruby laser line while transmitting shorter wavelengths
• Fluorescence Microscopy: Prevents NIR excitation bleed-through in red fluorophore studies
• Color Imaging Systems: Eliminates infrared contamination for accurate color reproduction
• Photographic Applications: Enhances color accuracy by filtering infrared light

Technical Advantages:

• Reliable OD3 blocking prevents detector saturation and stray light
• High transmission efficiency across blue to deep red spectrum
• Sharp transition at 690nm for precise spectral separation
• Excellent signal preservation in visible wavelengths
• Cost-effective solution for standard blocking requirements
• Durable multi-layer coating ensures consistent performance

Perfect for researchers and engineers working with deep red wavelengths who need reliable performance and cost-effective blocking. This filter provides the precision and reliability required for spectroscopy, fluorescence imaging, and optical systems where accurate visible light transmission with effective infrared blocking is essential.