70103 In Stock

The 70103 by Newport is a Merlin Digital Lock-in Radiometry System, a sophisticated solution tailored for precise radiometric measurements. Distinguished by its advanced features, this system incorporates the innovative Smart Ranging software, designed to facilitate seamless gain transitions and effortless integration of signal values spanning from sub-microvolts to volts without inducing electrical transients. The operational versatility of the 70103 encompasses both chopped radiation and a wide range of repetition rates, spanning from 8 Hz to 1100 Hz. To enable this functionality, an external chopper wheel is essential, serving to power and regulate the modulation process.

Comprising vital components such as an optical copper, detectors featuring preamplification, and the indispensable Merlin Control Unit, the 70103 system operates with notable cohesion. A noteworthy characteristic is the automatic recognition of the detector upon connection, streamlining the cooperative functionality of the system components. Central to the 70103 is its control unit, a hub of computational prowess equipped for intricate signal processing tasks. This includes sophisticated filtering and demodulation, resulting in exceptional fidelity and adaptability. The unit accommodates various modes of operation, including single or dual phase mode, and double time constant mode when specific demands arise.

The 70103’s remarkable computational capacity lays the foundation for the Smart Ranging feature, enabling instantaneous signal normalization and conversion. The control unit orchestrates the chopper's function, simultaneously serving as a lock-in amplifier. This strategic orchestration allows for the retrieval of modulated signals while effectively suppressing unmodulated background radiation. The 70103 control unit further conducts precise computations to derive signal values, conveniently presented in user-selected units based on preloaded calibration data. Notably, the modulation of the radiation for measurement purposes is achieved via a tailor-optimized chopper wheel, tailored to specific applications. This system can ascertain the 1st harmonic content of the modulated signal, enabling the determination of the RMS value.

The correlation between the 70103’s RMS value and the signal's peak-to-peak value is influenced by the ratio between the beam size and the aperture size of the chopper wheel. In scenarios where the beam is diminutive, resulting in an almost square wave signal, the ratio of measured RMS voltage to peak-to-peak voltage approximates 0.4502. Conversely, when the chopper wheel interacts with a uniformly distributed beam, a triangular wave shape ensues, and the RMS-to-peak ratio assumes a value of 0.3113. The 70103 system additionally empowers users to effortlessly switch to an alternative detector using the second channel, thereby expanding the spectrum of wavelengths under consideration. Data acquisition is facilitated through RS-232 or IEEE-488 communication boards, enabling functions such as parameter upload, data retrieval, and signal calibration.