Steep cutoff (approximately 1.25% of laser wavelength) - high blocking performance - high transmittance.
The standard long pass filter is a high-performance hard-coated filter with high blocking performance and high transmittance. It has a steep edge transition (approximately 1.25% of the laser wavelength) at a specific wavelength, allowing it to transmit longer wavelengths and reflect shorter wavelengths, enabling spectral separation. In particular, in Raman spectroscopy, it is necessary to separate Rayleigh scattered light (laser wavelength) from weak Raman scattered light, and the steep edge transition and high blocking performance make it easy to measure Raman spectra.
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basic information
■ Steep cutoff (around 1.25% of the laser wavelength): detectable closer to Rayleigh light (excitation laser wavelength) than 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
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| Model number | overview |
|---|---|
| 405 LPF-12.5 | Laser wavelength 405nm, 2.0nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 405 LPF-25.0 | Laser wavelength 405nm, 2.0nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 442 LPF-12.5 | Laser wavelength 442nm, 1.9nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 442 LPF-25.0 | Laser wavelength 442nm, 1.9nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 457 LPF-12.5 | Laser wavelength 457nm, 2.0nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 457 LPF-25.0 | Laser wavelength 457nm, 2.0nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 476 LPF-12.5 | Laser wavelength 476.4nm, 2.1nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 476 LPF-25.0 | Laser wavelength 476.4nm, 2.1nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 488 LPF-12.5 | Laser wavelength 488nm, 2.1nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 488 LPF-25.0 | Laser wavelength 488nm, 2.1nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 514.5 LPF-12.5 | Laser wavelength 514.5nm, 2.2nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 514.5 LPF-25.0 | Laser wavelength 514.5nm, 2.2nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 532 LPF-12.5 | Laser wavelength 532nm, 2.3nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 532 LPF-25.0 | Laser wavelength 532nm, 2.3nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 632.8 LPF-12.5 | Laser wavelength 632.8nm, 2.7nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 632.8 LPF-25.0 | Laser wavelength 632.8nm, 2.7nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 650 LPF-12.5 | Laser wavelength 650nm, 2.8nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 650 LPF-25.0 | Laser wavelength 650nm, 2.8nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 676 LPF-12.5 | Laser wavelength 676.6nm, 2.9nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 676 LPF-25.0 | Laser wavelength 676.6nm, 2.9nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 752 LPF-12.5 | Laser wavelength 752.5nm, 3.3nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 752 LPF-25.0 | Laser wavelength 752.5nm, 3.3nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 785 LPF-12.5 | Laser wavelength 785nm, 3.4nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 785 LPF-25.0 | Laser wavelength 785nm, 3.4nm (at 6 OD ~ 50% transmission), Φ25nm size |
| 830 LPF-12.5 | Laser wavelength 830nm, 3.6nm (at 6 OD ~ 50% transmission), Φ12.5nm size |
| 830 LPF-25.0 | Laser wavelength 830nm, 3.6nm (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.