The 440nm narrowband filter is an optical component derived from bandpass filters, with the core function of allowing light signals at a wavelength of 440nm to pass through while blocking signals on both sides outside this band. Compared to ordinary bandpass filters, it has a narrower passband, typically below 5% of the central wavelength value.

Product Technical Features

• All-dielectric hard coating technology: Utilizes the principle of dielectric interference, where optical performance is independent of substrate thickness, making it easy to integrate into imaging systems of instruments and enhancing optical performance1.
• Special optical material substrate: Addresses issues such as fogging and unstable optical performance commonly found in traditional absorptive synthetic glass, ensuring long-term reliability of the product1.
• Customized production: Can be manufactured according to customer specifications (e.g., transmittance, cutoff wavelength, etc.)1.

Application Fields of 440nm Narrowband Filters

This product is widely used in scenarios requiring high-precision filtering of specific wavelength light signals, including:

• Biochemical analyzers: Used for optical detection of biological samples, accurately isolating target wavelength signals.
• Optical measuring instruments: Enhances measurement accuracy and reduces stray light interference.
• Microplate readers: Filters background light in immunoassays to enhance the specificity of detection signals.
• Biometric recognition: Optical signal processing in devices such as fingerprint and iris recognition systems.
• Fields such as infrared medical instruments, fluorescence analyzers, and medical detection equipment;