| Specification (unit fitted with 1800l/mm grating used in first order) |
| Configuration |
Symmetrical Czerny Turner with alternative slit positions |
| Focal Length |
300mm |
| Aperture ratio |
F/4.2 |
| Slits |
Interchangeable fixed slits, micrometer adjusted, variable or motorised |
| Order sorting |
Unit can be fully order sorted from 200nm to 30µm by using option 252 and Bentham OS series of order sorting filters |
| Gratings |
69mm2 plane gratings kinematically mounted to allow change-over without loss of calibration. |
| Resolution |
M300HR: 0.15nm, M300E: 0.5nm
Maximum resolution obtainable is limited by misfocus in the collimating system. In the HR version, one of the collimating mirrors is mounted on a translation stage allowing fine positioning. All instruments are set up to achieve the specified resolution before delivery. |
| Stray light (at full aperture with 1nm bandwidth) |
1.5 bandwidths from laser line: 0.18%
3.0 bandwidths from laser line: 0.025%
10.0 bandwidths from laser line: 0.004% |
| Light gathering capability |
0.63 = slit height/(f number2 x dispersion) nm/mm |
| Wavelength scanning |
By integral stepping motor and microstepping drive electronics |
| Wavelength readout |
4 digit display reading directly in nm with readability of .02nm |
| Wavelength step |
Each step of the stepping motor results in a wavelength change of .01nm for the HR version and .05nm for the E version |
| Maximum scanning speed |
For 1800 g/mm grating,
M300HR: 4nm/s, M300E: 20nm/s |
| Wavelength accuracy |
±0.2nm of the true throughput range |
| Dispersion |
1.8nm/mm with 1800 grooves/mm grating |
| PC interface |
Integral IEEE-488 |
| Power supply |
Mains input 110/220V 50/60Hz |
| Weight |
12.3kg |
| Overall dimensions |
235mm x 330mm x 192mm high |
| Construction |
Single aluminium casting with rebated lid |
