Dual Spatial Filtration (DSF)
The standard dual spatial filtration (DSF) optical system in the NRS-5000/7000 spectrometers have a dual aperture system for confocal optics. This DSF system can eliminate any stray light that was not removed at the first aperture. The DSF method can improve the Z resolution and at the same time the spatial resolution at the XY plane.
A rotary encoder is a sensor that precisely detects angular position by converting the rotation displacement of the axis to a digital signal, measuring rotational displacement from a slit pattern on the rotary disk. The rotary encoder used in the NRS series monitors at a higher resolution than the wavenumber is moving for a greater accuracy.
NRS systems can measure the Neon lamp spectrum for calibration purposes. The correction is performed after the measurement made. This lamp is a built-in device that allows to perform calibration without opening the sample chamber.
Laser Spot Visualization:
Even if the angle of the notch/edge filter changes the optical axis is not out of alignment because the laser uses a different optical path. This position of the filter and beam splitter allows the observation of laser spot and sample.
It is an accessory that shares the same coordinates between an FTIR and a Raman microscope. IQ frame consists of a sample holder and a dedicated program, which enables automated sample position search by matching images. This is an effective tool for evaluating complex-materials, that includes organic and inorganic compounds.