SP490 Shortpass Filter (T＞92%@380-490nm, OD2@510-1100nm)

SP490 Shortpass Filter - Blue-Cyan Wavelength Control

The SP490 Shortpass Filter delivers excellent optical performance with high transmission in the blue-cyan region and reliable blocking of longer wavelengths, making it ideal for applications requiring precise blue-cyan wavelength control with comprehensive green to infrared rejection.

Key Specifications:

• Cut-off Wavelength: 490nm (T=50%)
• High Transmission Range: T>92% @ 380-490nm
• Reliable Blocking Range: OD2 @ 510-1100nm
• Optical Density: >100:1 blocking ratio
• Extended Blocking Range: 590nm blocking bandwidth

Applications & Benefits:

• Blue-Cyan Spectroscopy: Perfect for analyzing UV-blue-cyan wavelengths while blocking green and longer wavelengths
• Fluorescence Microscopy: Prevents green and red excitation bleed-through in blue fluorophore imaging
• LED Characterization: Ideal for testing UV, violet, and blue LEDs while blocking green components
• Photochemistry Applications: Enables precise blue light studies without longer wavelength interference
• Ocean Color Remote Sensing: Optimized for blue-cyan water analysis applications

Technical Advantages:

• High transmission efficiency in blue-cyan region maximizes signal
• Reliable OD2 blocking prevents detector saturation from longer wavelengths
• Sharp transition at 490nm for precise spectral separation
• Extended blocking range covers visible to near-infrared spectrum
• Excellent UV transmission for broadband blue applications
• Durable multi-layer coating ensures consistent performance

Essential for researchers and engineers working with blue-cyan wavelengths who need comprehensive longer wavelength blocking. This filter provides the precision and extended blocking range required for fluorescence microscopy, photochemistry, and optical systems where accurate blue-cyan transmission with superior green to infrared rejection is critical.