VS7000-CCD-HD

Spectral coverage

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 filter
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 300 µm tall CCD, 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 D₂ lamp.

CCD detector
Typical QE

Back-illuminated CCD with low etaloning in NIR
65% peak QE in UV

Detector height
Fiber-optic option

300 µm CCD height standard (1000 µm optional)
600 µm dia., 1.5 m long fiber-optic (for 1 mm tall CCD, prefer 800–1000 µm dia.)

Thermoelectric stabilization

None. Dark current and CCD-pattern noise must be subtracted. User must switch off light source or install
manual shutter in optical path. QE shifts slightly with temperature.

Spectral resolution
Pixel resolution
Slit (factory configuration)

UV-VIS: 75 µm slit, 2048 pixels, 2.7 nm resolution; 0.33 nm/pixel
(confi guration with 300 µm tall CCD)
Available slits: 12-25-37-50-62-75-100-125-150-200 µm (contact us for other gratings)

Improved CCD full well
Raw non linearity
Factory corrected linearity

>250 ke^– (sensitivity mode); >390 ke^– (high FW mode)
<1% (sensitivity mode)
<0.4% (sensitivity mode)

Typical dynamic range

7000:1 in sensitivity mode; 5500:1 in high FW mode

A/D converter

16 bit, 500 kHz (pixel rate)

Typical dark current

1 count/ms at 20°C (room temp.); typical offset = 1000 counts

Typical readout noise

35 e^– (max = 45 e^–) in sensitivity mode; 70 e^– (max = 90 e^–) in High FW mode

Readout speed

Max: 4.5 ms; 223 spectra/s with 0 exposure time

Typical signal-to-noise ratio

500:1 (sensitivity mode) to 625:1 (high FW mode). Shot-noise-limited conditions

Gain selection

4 e^_–/count and 6 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)