Steep cutoff, high blocking performance, high transmittance.
The ultra steep short pass filter is a high-performance hard-coated filter with a steep cutoff, high blocking performance, and transmittance. It has a sharp edge transition at a specific wavelength, allowing shorter wavelengths to pass through while reflecting longer wavelengths, enabling spectral separation.
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basic information
■ Steep cutoff (laser wavelength <0.5%): Detectable near Rayleigh light (excitation laser wavelength) compared to notch filters ■ High blocking performance (OD > 6 (typical)) ■ High transmittance (average transmittance 90% (typical)): Can detect weak Raman scattered light ■ Incident angle 0° ■ Effective aperture 8 mm (Φ12.5 mm filter), 21 mm (Φ25 mm filter) ■ Long lifespan and high durability
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Applications/Examples of results
■ Raman spectroscopy ■ Laser excitation ■ Fluorescence measurement ■ Biophotonics ■ Microscope
Line up（10）
| Model number | overview |
|---|---|
| 488 US SPF-12.5 | Laser wavelength 488nm, 1.7nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 488 US SPF-25.0 | Laser wavelength 488nm, 1.7nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 514.5 US SPF-12.5 | Laser wavelength 514.5nm, 1.9nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 514.5 US SPF-25.0 | Laser wavelength 514.5nm, 1.9nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 532 US SPF-12.5 | Laser wavelength 532nm, 2.0nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 532 US SPF-25.0 | Laser wavelength 532nm, 2.0nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 632.8 US SPF-12.5 | Laser wavelength 632.8nm, 2.4nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 632.8 US SPF-25.0 | Laser wavelength 632.8nm, 2.4nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 785 US SPF-12.5 | Laser wavelength 785nm, 3.1nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 785 US SPF-25.0 | Laser wavelength 785nm, 3.1nm (at 6 OD ~ 50% transmission), Φ25nm size |
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We are a group of experts specializing in spectroscopy, focusing on cutting-edge equipment such as light sources, spectrometers, detectors, our unique laser measurement systems, analytical devices, and femtosecond laser processing.
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