UItraopto Precision Optics Co. Ltd. high-performance ultra-narrowband filters are core components for high-precision optical filtering. They are available in stock and support full customization. These filters only allow an extremely narrow range of wavelengths in the spectrum to pass through. With their outstanding performance of ultra-narrow bandwidth, precise wavelength control, and high cut-off depth, they are suitable for the filtering requirements of industrial and scientific high-precision optical systems. They are ideal optical accessories for laser applications, spectral analysis, and other scenarios.
The core specification of this filter is an OD value greater than 4, with the center wavelength tolerance precisely controlled within 0.3-1nm. The bandwidth covers the full range of 1nm-6nm. It can achieve precise filtering of extremely narrow bands. It offers two mainstream diameter specifications of 12.7mm and 25.4mm (both with aluminum rings). Different bandwidths and center wavelengths are matched with a complete part number system to meet standardized selection needs. The optical performance of the product can be optimized as required. The transmittance of most specifications is greater than 85%/90%, and for some 1064nm models, it is greater than 80%. The cut-off range mostly covers 200-1000/1100nm. For special bands such as 1535nm, 1550nm, and 1570nm, detailed parameters can be obtained by consultation.
The product is widely used in high-precision optical application scenarios such as laser lines and laser purification, spectroscopy, biochemical analysis instruments, life sciences, education and research, providing stable and precise filtering solutions for various optical detection, analysis, and laser processing processes.
Ultraopto’s High-performance Ultra-narrow Bandpass Filter is a top-tier spectral optical filter engineered with state-of-the-art plasma deposition coating technology, featuring an ultra-narrow spectral passband with a full-width at half-maximum (FWHM) as narrow as <0.5nm and ultra-deep out-of-band rejection, serving as a core component in high-precision laser systems, biomedical diagnostics and advanced spectral analysis equipment.
Crafted from premium optical-grade glass and fused silica substrates, our product delivers an average peak transmittance of ≥90% at the design center wavelength, with a maximum transmittance of up to 98% for high-performance models, and an ultra-deep optical density of ≥OD8 in the blocking range (up to OD10 for custom designs), effectively blocking unwanted light and maximizing the signal-to-noise ratio in high-precision optical detection systems, with center wavelength tolerances as tight as ±0.05nm and extremely steep spectral edges with an ultra-flat passband profile, ensuring precise spectral isolation and stable optical performance. Manufactured with advanced hard coating technology, the filter exhibits high resistance to laser damage with a typical laser induced damage threshold (LIDT) of 1J/cm² @532nm, 10ns, enabling it to withstand high-intensity laser irradiation and ensuring long-term stable operation in demanding laser applications.
We implement the most stringent precision optical processing and coating quality control in the industry, achieving a superior surface quality with minimal light scattering and absorption loss, and a clear aperture of over 90% to ensure efficient light transmission. The filter features a compact and robust structural design with customizable dimensions and mounting options, enabling seamless integration into high-precision optical systems such as laser equipment, fluorescence microscopy and diagnostic instruments, and the scratch-resistant and chemical corrosion-resistant hard coatings exhibit excellent environmental stability, withstanding temperature changes, humidity and frequent cleaning, ensuring consistent spectral performance over a long service life. Our Ultra-narrow Bandpass Filter is optimized for high spectral performance, with minimal spectral drift and passband deformation under environmental changes, which is crucial for high-precision quantitative spectral analysis and laser system applications that demand extreme spectral accuracy and stability.
Ultraopto’s High-performance Ultra-narrow Bandpass Filter is widely applied in the most demanding professional optical fields, including laser systems for laser line selection, laser cleanup and laser excitation, ensuring pure laser beam output and protecting optical components from stray light interference, and in fluorescence microscopy for isolating specific fluorescence emission wavelengths to achieve high-contrast imaging of biological samples for biomedical research and clinical diagnosis. In biomedical diagnostics, it is an essential component in flow cytometry, real-time DNA sequencing and polymerase chain reaction (PCR) diagnostic instruments, enabling precise spectral detection of biological signals for accurate disease diagnosis and genetic analysis.
It also serves as a core component in advanced spectral analysis equipment for trace substance detection and high-precision material composition analysis, in environmental monitoring for detecting ultra-low concentration of atmospheric pollutants and water contaminants, and in laser spectroscopy for high-resolution spectral analysis of molecular and atomic structures. Additionally, the filter is used in aerospace optical sensors for high-precision spectral detection in space environments, as well as in academic research and cutting-edge optical experiment platforms that demand ultra-high spectral resolution and deep out-of-band rejection.
As a leading manufacturer of high-performance ultra-narrow bandpass optical filters, Ultraopto offers fully customized Ultra-narrow Bandpass Filter solutions to meet your unique high-precision spectral application requirements. Our professional R&D and engineering team, with rich expertise in advanced plasma deposition coating technology and spectral filter design, can tailor the center wavelength (UV, visible, infrared), FWHM (from <0.5nm to 5nm), optical density level and filter dimensions, with ultra-strict tolerance control for center wavelength and passband width to ensure the highest level of spectral accuracy. We also provide custom laser damage threshold optimization for high-power laser applications, as well as custom anti-reflection coatings to further reduce surface reflection loss and enhance transmittance efficiency.
All custom Ultra-narrow Bandpass Filter orders undergo multi-stage strict high-precision optical performance testing and quality inspection, including transmittance measurement, center wavelength verification, optical density testing, laser damage threshold testing and environmental stability testing, with a detailed quality inspection report provided to ensure the final product fully complies with your design specifications and application needs. Backed by state-of-the-art plasma deposition coating technology, a complete high-precision quality control system and stable batch supply capacity, Ultraopto is committed to providing global customers with high-quality High-performance Ultra-narrow Bandpass Filter products and one-stop high-precision spectral optical solutions. For more detailed technical parameters, product quotation information or custom design solutions for our Ultraopto High-performance Ultra-narrow Bandpass Filter, please contact our professional sales and technical team through the official website, and we will provide you with efficient, professional and personalized optical solutions to support the development and production of your high-precision optical systems and diagnostic instruments.
