| ■规格 |
|
measuring principal
|
double beam, single beam monochromatic sample illumination |
measuring time
|
400ms at 0.1nm data distance |
data distance
|
UV-VIS 0.1; 0.2; 0.5; 1.0nm
NIR I 0.2; 0.4; 1.0; 2.0nm
NIR II 0.4; 0.8; 2.0; 4.0nm |
| light sources |
halogen lamp, deuterium lamp |
| monochromator |
monochromator with halographic grating "Czerny-turner"
with fixed entrance and exit slits
f=250mm
linear dispersion:
UV-VIS:1.6nm/mm
NIR I :3.2nm/mm
NIR-II:6.4nm/mm |
| slit width |
between 50
μ and 3000
μ infinitely variable
16 steps free programmable,
automatic readout in parameter field |
| stray light |
3 x 10-12 at 589nm |
| wavelength accuracy |
UV-VIS better 0.1nm
NIR I better 0.2nm
NIR-II better 0.4nm |
| wavelength reproducibility |
0.001nm |
| total straylight |
<0.01%T at the end of range |
| optical resolution |
UV-VIS 0.05nm
NIR I 0.1nm
NIR-II 0.2nm |
| data acquisition |
UV-VIS 0.1nm
NIR I 0.2nm
NIR-II 0.4nm |
| photometric accuracy |
better 0.1%T |
| drift |
according to measuring principle without influence
on measurement |
