CT-Multichannel CCD Spectrometer

Spectral coverage Option

UV-VIS: (200–860 nm), 250 nm optimized grating, built-in order-sorting filter
VIS:(380–750 nm), VIS-blazed grating, built-in long-pass fi lter
UV-NIR:(200–1050 nm), dual-blaze grating, built-in order-sorting filter

Numerical aperture

f/2.8

Stray light rejection
Typical (Maximum)

0.01% (0.02%) for UV-VIS configuration with 500
µm tall PDA, measured at 700 nm
(measured with broad bandpass 510 nm filter, 75 µm slit-width)
>2.4 AU linear range (5% variation) with caffeine 273 nm absorption peak in 10 mm cuvette and D
2 lamp.

PDA detector response

High UV sensitivity. Response range from 200 nm to 1000 nm

Detector height
Fiber-optic option

500 µm PDA height standard (2.5 mm optional);
600 µm dia., 1.5 m long fi ber-optic;
or special bundle

Thermoelectric stabilization

None. Dark current and PDA-pattern noise must be subtracted. User must switch off light source or install manual shutter in optical path.

Spectral resolution
Pixel resolution
Slit (factory configuration)

UV-VIS: 75µm slit, 1024 pixels, 2.7 nm resolution on 500 µm tall PDA;
0.33 nm/pixel (can be customized for 512 pixels)
Available slits: 12-25-37-50-62-75-100-125-150-200 µm (contact us for other gratings)

Improved PDA full well 

100 Me^– (1 Ge^– optional)

Typical dynamic range

26 000:1

A/D converter

16 bit, 500 kHz

Typical Dark current

0.16 count/ms at 20°C (room temperature); typical offset = 300 counts

Typical readout noise

2.6 counts (3900 e^–); maximum = 3.5 counts

Readout speed

Multi-acquisition: 3.5 ms; 285 spectra/s   Single acquisition: 10 ms; 100 spectra/s (with 0 exposure time)

Typical signal-to-noise ratio

10 000:1

Gain selection

1500 e^–/count

Dimensions (H × W × D)

2.9” × 4.1” × 4.3” (73.0 mm × 103.2 mm × 109.4 mm)

Weight

1.8 lb (0.82 kg)