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MKS adds new irradiance and dosage sensor

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Ophir PD300RM-UVA has flat spectral response for use with narrowband and broadband sources

MKS Instruments Announces Ophir PD300RM-UVA, Irradiance and Dosage Sensor with Flat Spectral Response for Use with Narrowband and Broadband Sources

MKS Instruments has announced the Ophir PD300RM-UVA Irradiance and Dosage Sensor. Calibrated over the UVA and violet spectral range (350-450nm), the sensor provides a flat spectral response that is forgiving of inexact wavelengths, wide bandwidths, and wavelength shifts (e.g. due to heating).

This allows for measuring both narrowband (lasers) and broadband sources, such as LEDs, without the need to know the exact wavelength. The sensor also supports measuring sources at different wavelengths simultaneously. It is designed to analyze light sources, including for UV curing and drying of polymers, paints, and other UV responsive materials that are used in industrial applications, such as semiconductor processing and additive manufacturing.

"UV LEDs are being put to work in a variety of industrial processes and medical applications, but accurate measurement in the UV range faces challenges, such as not knowing the precise bandwidth of the light, uneven illumination, steep angles, and wavelength shifts due to heating," said Reuven Silverman, general manager Ophir Photonics.

"The PD300RM-UVA sensor, with its small form factor, UV-resistant design, and NIST-traceable calibration over the UVA and violet spectrum, generates accurate and reproducible irradiance and dosage measurements that are in high demand in the industrial and medical applications that rely on UVA LEDs. When used in conjunction with Ophir meters, the sensor can be employed in early R&D projects, used for calibration and maintenance at customer sites, or incorporated into fully-operational machines."

Traditional radiometers are calibrated to a single wavelength (e.g. 365nm). The Ophir PD300RM-UVA sensor employs a high quality UV-enhanced silicon photodiode design that is calibrated over a broad spectral range (350-450nm) and delivers high linearity and sensitivity. The sensor features a small 2.75mm aperture for more precise mapping of irradiance at different positions and a cosine corrected diffuser for eliminating angle sensitivity. Its irradiance measurement range is 1.5μW/cm² – 15W/cm².

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