405 nm Narrow Bandpass Optical Filter

The 405 nm narrow bandpass optical filter is a high-performance bandpass filter specifically designed for optical applications at the 405 nm wavelength. It efficiently transmits the target band of 400-410 nm while providing deep blocking of outofband stray light, effectively improving the signaltonoise ratio, wavelength selectivity, and detection accuracy of optical systems. Manufactured with highquality hard dielectric multilayer coatings, the filter features high transmittance, deep blocking, excellent spectral stability, and good environmental durability, meeting the needs of highperformance spectral filtering in research, industrial, and biomedical applications. The filter achieves an average transmittance greater than 87% over the 400-410 nm band, and provides blocking of OD5 or higher over the ranges of 350-391.5 nm and 418.5-850 nm, effectively suppressing background light and adjacent wavelength interference. It supports an incident angle of 0°± 5°and a cone halfangle of 7°, and is offered in a standard 25 mm round form with an effective clear aperture of ≥21 mm, facilitating compatibility with various optical systems and standard mounts. With outstanding filtering performance, stable coating quality, and reliable longterm operation, the 405 nm narrow bandpass optical filter is widely used in 405 nm laser systems, fluorescence microscopy, confocal microscopy, flow cytometry, Raman spectroscopy, biomedical detection, machine vision, precision optical instruments, and other optical systems requiring highselectivity wavelength filtering.

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405 nm Laser Line Bandpass Filter

The 405 nm laser line bandpass filter is a high-performance narrow-band optical filter specifically designed for 405 nm laser sources, manufactured using a multi-layer hard dielectric thin-film coating process. The product is optimized for the 405 nm laser wavelength, achieving >90% transmittance at 405 nm while providing ultra-deep blocking of OD5 to OD6 or higher on both sides of the laser line. This effectively suppresses laser side lobes, ambient light, and other stray light interference, significantly improving the signal-to-noise ratio and detection accuracy of optical systems. Featuring an ultra-narrow 1.5 nm FWHM, high stability, high damage threshold, and excellent environmental reliability, this filter is suitable for high-precision optical applications including laser Raman spectroscopy, confocal microscopy, fluorescence excitation, laser detection, machine vision, and scientific instrumentation.

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400 nm Narrow Bandpass Optical Filter

The 400 nm narrow bandpass optical filter is an ultraviolet narrow bandpass filter manufactured using a highperformance, multilayer hard dielectric thinfilm coating process. It is specifically designed for efficient transmission of optical signals at the 400 nm band and suppression of outofband light. The filter achieves an average transmittance greater than 90% over the operating band of 394–406 nm, while providing excellent blocking performance across the ultraviolet, visible, and nearinfrared nonoperating regions. This effectively reduces stray light interference, improving detection sensitivity and imaging quality. The product offers good environmental stability, high laser damage tolerance, and excellent spectral consistency, making it widely applicable in highprecision optical systems such as ultraviolet laser systems, fluorescence detection, biomedical analysis, spectroscopic instruments, machine vision, and scientific research.

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442 nm Long-Pass Dichroic Filter

The MP-LWP-442 is a high-performance dichroic long-pass filter designed specifically for Raman spectroscopy, super-resolution imaging, and total internal reflection fluorescence (TIRF) microscopy. Manufactured on fused silica substrates with precision dielectric coatings, it efficiently reflects the 439-457.9 nm band while maintaining high transmission from 466.1 nm to 1200 nm at a 45°angle of incidence. The filter features a steep spectral cut-on edge, a broad transmission range, excellent wavefront quality, and a high laser damage threshold, making it ideal for efficient separation of laser excitation light from Raman, fluorescence, or imaging signals.

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427 nm Bandpass Filter

The MP-BPF-427 is a high-performance narrowband bandpass optical filter with a center wavelength of 427 nm. It is designed to transmit the target band with high transmittance while providing excellent out-of-band blocking across the ultraviolet and visible range. Manufactured with hard multi-layer dielectric coatings, this filter features high transmittance, high spectral stability, and excellent environmental durability. It is suitable for applications such as fluorescence detection, Raman spectroscopy, laser systems, biological imaging, microscopy, and scientific instrumentation.

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567 nm Narrow Bandpass Optical Filter

The 567 nm narrow bandpass optical filter is manufactured using a high-performance hard dielectric multilayer coating process. It is specifically designed for yellow-green band excitation and detection applications, and is widely used in fluorescence microscopy, confocal microscopy, flow cytometry, biomedical detection, Raman spectroscopy, and precision optical instrumentation. The filter offers exceptionally high transmittance in the 559.5-574.5 nm band while providing broad-spectrum, high-rejection performance outside the passband. It effectively suppresses excitation light leakage and background stray light, improves detection sensitivity and imaging contrast, and meets the demanding requirements of research and industrial applications.

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460 nm Narrow Bandpass Optical Filter

The 460 nm narrow bandpass optical filter is manufactured using a high-performance hard dielectric multilayer coating process. It is specifically designed for blue-band excitation applications, including fluorescence microscopy, flow cytometry, laser detection, biomedical instrumentation, spectral analysis, and precision optical systems. The filter offers high transmittance in the 453-467 nm band while providing efficient rejection outside the passband. It effectively suppresses background stray light, improves system signal-to-noise ratio and detection accuracy, and meets the demanding performance requirements of research and industrial applications.

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406 nm Narrow Bandpass Optical Filter

The 406 nm narrow bandpass filter is an interference filter manufactured using a high-performance hard dielectric coating process. It is specifically designed for fluorescence microscopy, Raman spectroscopy, laser detection, biomedical imaging, and precision optical instruments. The product offers high transmittance in the 398.5-413.5 nm band, while providing excellent rejection outside the passband. It effectively suppresses stray light, improves system signal-to-noise ratio, and ensures accurate and stable measurement results.

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671 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-671 is a high-performance dielectric thin-film filter specifically designed for 671 nm laser Raman spectroscopy systems. Manufactured on a high-quality fused silica substrate with precision hard‑coated dielectric layers, it provides efficient rejection of the 671 nm laser line while maintaining high transmittance for Raman scattering signals. Featuring an ultra-steep cut-off edge, an extremely high optical density (OD > 6), high pass-band transmittance, and excellent environmental stability, this filter effectively improves the signal-to-noise ratio of Raman spectroscopy systems. It is particularly suitable for low-wavenumber Raman measurements, micro-Raman spectroscopy, laser spectral analysis, and research optical instruments.

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664 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-664 is a high-performance dielectric thin-film filter specifically designed for 664 nm laser Raman spectroscopy systems. Manufactured on a high-quality fused silica substrate with precision hard‑coated dielectric layers, it provides efficient rejection of the 664 nm laser line while maintaining high transmittance for Raman scattering signals. Featuring an ultra-steep cut-off edge, an extremely high optical density (OD > 6), high pass-band transmittance, and excellent environmental stability, this filter effectively improves the signal-to-noise ratio of Raman spectroscopy systems. It is particularly suitable for low-wavenumber Raman measurements, micro-Raman spectroscopy, laser spectral analysis, and research optical instruments.

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647.1 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-647 is an ultra-steep-edge long-pass filter specifically designed for 647.1 nm laser systems. Employing high-performance multi-layer dielectric coating technology, it provides efficient rejection of the 647.1 nm laser line and short-wavelength background light, while ensuring excellent transmission for Raman scattered light, fluorescence signals, and other long-wavelength radiation above the cut-off edge. The filter offers a blocking depth of OD > 6 at the 647.1 nm laser wavelength and an average transmittance greater than 93% over the 655.5-1459.6 nm band. With an ultra‑narrow transition band of only 6.5 nm and an ultra-steep cut-off edge, it effectively improves the detection efficiency of near-laser-line Raman signals, making it widely applicable in Raman spectrometers, laser analysis, and precision optical systems.

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632.8 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-633 is an ultra-steep-edge long-pass filter specifically designed for 632.8 nm laser systems. It provides deep blocking of the 632.8 nm laser line and short-wavelength background light, while allowing efficient transmission of Raman and fluorescence signals above the cut-off edge. The product offers an optical density greater than OD6 at 632.8 nm and an average transmittance greater than 93% over the 641-1427.4 nm band. With a transition width of only 6.3 nm, it is ideally suited for Raman spectroscopy systems that demand high laser rejection, steep cut-off edges, and efficient near-laser-line signal collection.

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