IDR150 Double Monochromator
Optical Layout
| Configuration | Pair symmetrical Czerny Turner monochromators, additive dispersion |
| Focal length | - Total focal length: 300mm - Individual units: 150mm |
| Grating mount | Kinematic |
| Number of gratings | 1 pair |
| Grating size | 33x33mm |
| Aperture ratio | f/4 |
| Number of entrance/exit ports | 1 entrance, 1-2 exits |
| Spectral range | Within range 200nm-2400nm |
Opto-Mechanical
| Wavelength scanning | By integrated stepping motor and micro-stepping drive electronics |
| Slit type | Fixed, micrometer or motorised variable |
| Slit width & height | 10µm-10mm (W) x 20mm (H) |
| Filter size | - 6 position filter wheel : 25mm diameter - 8 position filter wheel : 22mm diameter |
Optical Performance (quoted for typical 2400 g/mm gratings)
| Spectral range | 200-600nm |
| Linear dispersion | 1.35nm/mm |
| Wavelength accuracy | ± 0.15nm, ± 0.05nm with software correction |
| Wavelength reproducibility | ± 0.05nm |
| Resolution full/reduced slit height | 0.25/0.1nm |
| Stray light rejection at 2.5 FWHM | 10-8 |
| Wavelength sweep speed | 30nm/s |
487 Dual-Channel Picoammeter Module - Electrical
| Channel 1 input | Current input to picoammeter |
| Channel 2 input | Current input to picoammeter |
| Gain ranges | 1010-105 V/A |
| Maximum current Input | 100µA |
| Frequency response | DC to 30Hz |
| Gain accuracy | +1% |
| Gain stability | 200ppm/°C |
| Output stability | 5ppm/°C to 500ppm/°C depending on sensitivity |
| Linearity | < 0.025% departure from linearity from zero to full scale |
| ADC resolution | 4½ digit BCD (0 to 19999) i.e. > 14 bit resolution |
| ADC integration time | 100ms |
| Auxiliary input range | 0- 9.8V |
| Picoammeter input impedance | Virtual earth |
| Auxiliary input impedance | 1 MΩ |