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The 650nm Shortpass Edge Filter is a high-performance optical interference filter designed to selectively transmit light with wavelengths shorter than 650nm while blocking red and near-infrared light above 650nm.
- With a cutoff wavelength of 650 ±3nm, it precisely separates visible and near-infrared regions, effectively filtering out background red light and improving system contrast and detection sensitivity.
- It offers ≥90% transmission from 355–640nm, ensuring maximum light throughput in the excitation or target visible wavelength range and enhancing optical efficiency.
- The filter provides OD4 blocking depth up to 830nm, effectively suppressing unwanted long-wavelength infrared background light to eliminate interference and noise.
- We utilize a hard-coated process, giving the filter excellent resistance to scratching, humidity, and aging, making it suitable for harsh environments or long-term use.
- Using D263T as the substrate, the filter offers high transmittance, no visible defects, and no internal bubbles or striae, ensuring consistent spectral performance across the entire aperture—especially ideal for high-resolution imaging and precision measurements.
