10nm narrowband bandpass filter newly launched

UltraOpto New Product Launch | 10nm Narrow Bandpass Filter, Core Component for Ultra-Precise Narrowband Spectral Filtering

UltraOpto newly launches the 10nm narrow bandpass filter. As a core component in the field of precision spectral filtering, relying on high-end multi-layer dielectric interference coating technology, it achieves high transmission of specific wavelengths with a fixed 10nm narrow bandwidth and deep cutoff of other wavelength bands. It features high peak transmittance, excellent cutoff depth, and ultra-precise central wavelength, providing a highly reliable narrowband spectral filtering solution for fields with strict requirements on spectral filtering accuracy, such as laser systems, high-resolution spectral analysis, and biomedical precision detection.

The full width at half maximum (FWHM) of the product is precisely controlled within 10±2nm, supporting customization of mainstream central wavelengths across the ultraviolet, visible, and near-infrared bands, including 365nm, 488nm, 532nm, 632.8nm, etc. The central wavelength tolerance is ±2nm for regular models and can reach ±0.5nm for laser-specific models, maximizing spectral filtering accuracy. The peak transmittance is ≥85%, with high-end models exceeding 90%, ensuring excellent light flux utilization efficiency. The out-of-band cutoff depth is ≥OD4 for regular models and can reach OD5/OD6 for customized models. The steep transition band completely filters out stray light, eliminating signal crosstalk and significantly improving the signal-to-noise ratio of optical systems.

The core substrate is preferably fused silica (UVFS/JGS1), which has good optical uniformity, weak autofluorescence, and high laser damage threshold, making it suitable for core high-end scenarios such as laser systems and fluorescence detection. For regular visible light bands, N-BK7/H-K9L optical glass can be used, which is cost-effective and suitable for general precision spectral requirements. It adopts ultra-precision hard coating processes such as ion beam sputtering/electron beam evaporation + ion-assisted deposition to deposit alternating multi-layer dielectric films with high and low refractive indices. The film layers are dense, scratch-resistant, corrosion-resistant, and can be repeatedly wiped. The anti-reflection coating on the light-transmitting surface improves transmittance, and the blackened edge coating suppresses scattered stray light, ensuring stable optical performance from substrate to coating.

The regular shape is circular, with the mainstream size of Φ25.4mm, and other specifications such as Φ12.5mm and Φ50mm can be customized. The effective clear aperture is >90%, the substrate thickness is 3mm, and the version with an aluminum frame is 5±1mm. The dimensional tolerance is 0/-0.1mm, the surface meets the grade IV光洁度 standard, and the edges have protective chamfers to prevent chipping. The wavefront distortion RMS value is <λ/[email protected], and the performance is stable within an incident angle of 0±5°, suitable for the installation of various regular optical paths. The finished product is equipped with an oxidized blackened aluminum frame, which not only protects the component but also facilitates integration. The aluminum frame is marked with core parameters and light propagation direction, improving usability, and the performance consistency in mass production is excellent.

The products are inspected in all dimensions by high-resolution spectrophotometers before leaving the factory, covering all core indicators such as central wavelength, bandwidth, transmittance, and cutoff depth. They have passed rigorous tests such as high-low temperature cycling, damp-heat aging, and film adhesion, ensuring no drift in optical performance under temperature changes and humid environments, suitable for long-term continuous operation in industrial and scientific research applications. It is widely used in laser system spectral line separation/pump light isolation, high-resolution spectral analysis such as Raman/atomic absorption, biomedical precision detection such as fluorescence microscopes/flow cytometers, and also suitable for high-end scenarios such as precision colorimetry analysis and quantum optics research. Mainstream central wavelength specifications are available in stock, and customized models support small-batch sampling with stable delivery times, creating an ultra-precise narrowband spectral filtering core for various precision optical systems.