GS Series
The GS-3100 and GS-4100A Radiometers, with internal microprocessors, represent a dynamic concept in instrumentation for seven radiation measurements. They have no adjustments – no dark current, no zero or high-voltage controls, no range switches, no displays, no indicators, no calibration controls and no shutter and time-constraint selection switches. They are simply boxes with an on/off switch, controlled from your computer via a two-way RS-232 interface.
Featuring full-logic and control circuitry for spectral and spatial scanning applications, the units work with any Gamma Scientific detector assembly, including photomultiplier and silicon. They also operate any Gamma Scientific NM-Series digital holographic monochromator or GS-2110A digital scanning telemicroscope.
The systems include an electrometer amplifier, a high-voltage power supply, an A/D and D/A converter and a microprocessor. All firmware is in machine code; this significantly speeds up system operation. Additionally, all digital-scan control, calibrator and shutter-control circuits are included.
- Electronic dark-current suppression
- Zero-offset subtraction
- Autoranging decisions
- Signal averaging
- Self-calibrating wavelength scale (spectral), displacement scale (spatial) and amplitude scale
- Setting of photomultiplier high voltage
- Selection of amplifier time constant
- Amplitude correction based on internal reference lamp
- Shutter and filter insertion
- GS4100A Expandable to two stepper drivers and three photometer channels
NM-3DH and 5DH monochromators
Low stray light, excellent throughput and wide wavelength range highlight the features of Gamma Scientific's NM-3DH and 5DH monochromator systems. Each system uses an astigmatic holographic grating as the monochromatic selector.
With the addition of either a Gamma Scientific detector assembly or light source, these systems can be quickly configured to measure sources or detectors respectively. In either configuration they are computer controlled using our Model GS-4100A or GS-3100 intelligent radiometer and Light Touch software.
The NM-3DH and NM-5DH are identical except for optical specifications. Each includes an electric shutter for dark-current subtraction via computer control.
In both systems, careful optical design eliminates any optical element between slits except for the concave grating. There are no mirrors or lenses between slits. This approach minimizes scattered light in this, the most critical optical part of the monochromator.
- Low stray light
- Excellent throughput
- Wide wavelength range
- NM-5DH 200-800 nm
- NM-3DH 300-1100 nm
- Excellent wavelength accuracy
- Different half-power bandwidths available
- Optical design has no mirrors or lenses between the slits
NM-7DHA, NM-9DHA and NM-10DH monochromators
Low stray light, excellent throughput and wide wavelength range highlight the features of Gamma Scientific's NM-7DHA, NM-9DHA and NM-10DH monochromator systems. Each system uses two mechanically linked astigmatic holographic gratings as the monochromatic selector.
With the addition of either a Gamma Scientific detector assembly or light source, these systems can be quickly configured to measure sources or detectors respectively. In either configuration they are computer controlled using our Model GS-4100A or GS-3100 intelligent radiometer and Light Touch software.
The NM-7DHA, NM-9DHA, and NM-10DH are identical except for optical specifications. Each includes an electric shutter for dark-current subtraction via computer control.
With all systems, careful optical design eliminates any optical element between slits except for the concave grating. There are no mirrors or lenses between slits. This approach minimizes scattered light in this, the most critical optical part of the monochromator.
- Low stray light
- Excellent throughput
- Wide wavelength range
- NM-9DHA 200-800 nm
- NM-7DHA 300-1100 nm
- NM-10DH 350-1700 nm
- Excellent wavelength accuracy
- Different half-power bandwidths available
- Optical design has no mirrors or lenses between the slits
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