RCH-1 Series
High Intensity Irradiance Detectors with rigid Light Guide

The RCH Type detectors are designed for measurement of high irradiance levels as found in UV curing applications. Their low profile of only 8mm high enables measurement of irradiance and irradiance dose very close to the test sample surface. The 9mm diameter cosine diffuser offers a good integration to resolution ratio in applications involving flat-field sources and when measuring light output of light guide equipped sources with common size fiber optic diameters.
Unlike conventionally designed irradiation detectors where the detector housing containing the optical band-pass filter and photodiode are directly exposed to the high intensity irradiation Gigahertz-Optik has developed a detector design with separate light detection element and light detector. Only the input optic element is exposed to high intensity radiation. The detector and optical band pass filter remain outside the hot zone. The input optic element is made out of RADIN an optical material that can withstand high temperatures and high UV irradiation levels up to 40W/cm². For extended life time with minimum degradation under UV irradiation the material is pre-aged using high energy UV-C radiation. The RADIN element is passive. It simply integrates and attenuates then transmits the light signal into its attached light guide up to the detector. The detector capsule enclosing the photodiodes and optical band-pass filter is attached to other end of the fiber light guide. The RCH-1 detectors are equipped with a 22 cm long rigid light guide shielded with a stainless steel tube between the RADIN element and the detector capsule. The RCH-0 type detector can be ordered with a wide selection of spectral sensitivities. This enables the user to select a spectral sensitivity that best covers the polymerization effective wavelength range for his application and the emission spectrum of the light source:

RCH-102: Spectral Sensitivity Range UVABLUE
RCH-105: Spectral Sensitivity Range UVBLUE
RCH-106: Spectral Sensitivity Range UV Broadband
RCH-108: Spectral Sensitivity Range UVA _{Peak 365 nm}
RCH-109: Spectral Sensitivity Range BLUE _{Peak 430 nm}
RCH-110: Spectral Sensitivity Range H-Type 240-320nm
RCH-111: Spectral Sensitivity Range D-Type 350-400nm
RCH-112: Spectral Sensitivity Range V-Type 400-450nm
RCH-113: Spectral Sensitivity Range 305-485nm
RCH-114: Spectral Sensitivity Range 400nm+436nm
RCH-115: Spectral Sensitivity Range 436nm

The detectors are supplied with a 0.5m long coaxial cable with selectable –1, -2 or -4 type connector for use with Gigahertz-Optik’s range of optometers. Calibration of UV irradiance in Wm² and W/cm² is performed at Gigahertz-Optik’s Calibration Laboratory for Optical Radiation Quantities.