185/20nm DUV Deep Narrowband UV Transmitting Filter Overview

Coligh manufactures 185/20nm DUV bandpass filters. 185/20nm bandpass filters are specially designed for DUV range. It has a nearly 13% transmission at 190nn and a deep blocking depth until to 1200nm.

Leveraging advanced hard coating technology and exceptional process control, this filter exhibits outstanding resistance to solarization; it maintains stable optical performance even under prolonged exposure to high-energy ultraviolet radiation, making it an ideal choice for precision analytical instruments and laser systems.

The spectrum Curve Of 185/20nm DUV Deep Narrowband UV Transmitting Filter

185/20nm DUV Deep Narrowband UV Transmitting Filter Technical Specifcation

• Centerwavelength: 185+/-3nm
• FWHM: 20+/-3nm
• Transmission Peak >13%
• Blocking depth: 170-1200nm@OD3 average
• Standard Size in stock: Dia25.4*6mm

Narrowband UV Transmitting Filters In Stock List:

185/20nm DUV Deep UV Transmitting Filter Applications

TOC Water Quality Analyzers

In ultrapure water monitoring, the measurement of organic matter requires high-energy photons; 185 nm deep-ultraviolet (DUV) light effectively splits water molecules to generate hydroxyl radicals, which then oxidize the organic matter. A 185/20 nm DUV bandpass filter detects weak signals while blocking background stray light, thereby enhancing the optical signal-to-noise ratio of the TOC analyzer.

Ozone Concentration Detection Equipment

Oxygen molecules exhibit a strong characteristic absorption peak at 185 nm, which is the critical wavelength for dissociation into ozone. A 185/20 nm UV bandpass filter isolates the system from ambient stray light and allows for the measurement of light intensity attenuation at this wavelength, enabling the calculation of ozone concentration. The 185/20 nm DUV filter ensures high sensitivity in ozone concentration detection.

Deep-UV Spectrophotometers

Certain structures, such as peptide bonds in proteins and specific aromatic compounds, exhibit extremely strong characteristic absorption in the deep-UV region. To achieve the analysis of trace chemicals or biological macromolecules, the optical system must provide highly pure monochromatic light. A 185/20 nm UV filter suppresses background light and reduces spectral baseline noise, enabling the instrument to perform rapid and accurate analyses.