IDR300 Double Monochromator
Optical Layout
| Configuration | Pair symmetrical Czerny Turner monochromators arranged for additive dispersion |
| Focal length | Total focal length: 600mm Individual units: 300mm |
| Grating mount | Triple grating turret |
| Number of gratings | 1-3 |
| Grating size | 68 x 84mm |
| Aperture ratio | f/4.1 (at all grating angles) |
| Number of entrance/ exit ports | 1/2 or 2/1 on both monochromators |
Opto-Mechanical
| Mechanical resolution drive | 0.00014°/ step |
| Slit type | Motorised variable slit |
| Slit width & height | 10µm-10mm (W) x 20mm (H) |
| Filter size | 25mm diameter |
Optical Performance (quoted for 1200 g/mm gratings)
| Spectral range | Within range 200nm-50µm |
| Linear dispersion | 1.35nm/mm |
| Wavelength accuracy | ± 0.1nm |
| Wavelength reproducibility | ± 0.025nm |
| Resolution full/reduced slit height | 0.15/ 0.05nm |
| Stray light rejection at 2.5 FWHM (single mode) | 10-4 |
| Stray light rejection at 2.5 FWHM (double mode) | 10-8 |
| Wavelength acquisition speed | 2000nm/s |
Electrical/ Mechanical
| Overall dimensions | 624L x 375W x 255H mm |
| Optical height | 168mm |
| Weight | Approx. 30 kg |
| Power supply | Mains input 110/220V 50/60Hz |
487 Dual-Channel Picoammeter Module - Electrical
| Channel 1 input | Current input to picoammeter |
| Channel 2 input | Current input to picoammeter |
| Channel 3 input | Current input to picoammeter |
| Channel 4 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 |