CDS-Series CCD Spectrometers

Labsphere CDS-600 CCD Spectrometer

Accurate, high-speed spectroradiometric measurements

Labsphere's CSLMS, FS2 and Half Moon spectroradiometer systems are based around a CDS-series CCD spectrometer. The CDS-600 & 610 are uncooled spectrometers, while the CDS-1100 & 2100 are based upon TE-cooled, back-thinned CCDs with enhanced sensitivities. Spectrometer control is from a PC using LightMtrX software. Unlike traditional scanning monochromators that perform spectral power measurements one wavelength at a time, the CDS spectrometers are based upon CCD arrays that capture a complete spectrum in an instant (typically less than 1 second). A CDS-series spectrometer can be combined with an I-1000 or I-2000 intensity head and the LSA-3000 goniophotometer for the measurement of absolute spectral radiant intensity and colour from individual LEDs as a function of angle.

Spectroradiometer or Photometer?

The photopic and tristimulus response matching errors inherent in filter photometers and colorimeters becomes significant with narrow spectrum light sources such as LEDs, CFLs and discharge lamps. Standards such as IES LM 79-08 strongly recommend that measurements on such light sources should be performed spectroradiometrically. In a spectroradiometer, photometric and colorimetric parameters are computed in software from the spectral power distribution of the light source under test, resulting in a level of accuracy that ensures that your measurements correlate perfectly with visual assessment of the light source. For further information on the errors associated with filter photometers, download our Technical Note.

CDS-600 & CDS-610 CCD Spectrometers

The CDS-600 & CDS-610 uncooled spectrometers have a spectral response of 200-850nm and 350-1000nm, respectively. Please note that the calibration range of the standard lamps used to calibrate Labsphere spectroradiometer systems may further limit the overall working range of the spectrometer. Each spectrometer is supplied with a 3m optical fibre with SMA terminations. To connect the optical fibre to a Labsphere integrating sphere, the spectrometer is also supplied with an SMA port adaptor that fits onto a ½" detector port on the sphere. The spectrometer communicates with the PC through a supplied 2m USB interface cable.

CDS-1100 & CDS-2100 Enhanced Sensitivity Spectrometers

The CDS-1100 & CDS-2100 spectrometers provide enhanced sensitivity and reduced noise measurements in the 250-850nm and 350-1050nm bands, respectively. Please note that the calibration range of the standard lamps used to calibrate Labsphere spectroradiometer systems may further limit the overall working range of the spectrometer. These spectrometers are based upon thermoelectrically cooled (TEC), back-thinned CCD arrays with integral electro-mechanical shutters for dark current correction. The CDS-1100 & 2100 are recommended for low light level measurements, or whenever long measurement integration times are required. Each spectrometer is supplied with a 3m optical fibre with SMA terminations. To connect the optical fibre to a Labsphere integrating sphere, the spectrometer is also supplied with an SMA port adaptor that fits onto a ½" detector port on the sphere. The spectrometer communicates with the PC through a supplied 2m USB interface cable.

Specifications

	CDS-600	CDS-610	CDS-1100	CDS-2100
Part Number	AS-02767-000	AS-02767-100	AS-02746-100	AS-02746-200
Spectroscopic
Spectral Range¹	200-850nm	350-1000nm	250-850nm	350-1050nm
Spectral Resolution	< 2nm		1.5nm
Wavelength Accuracy	± 0.4nm		± 0.4nm
Signal-to-Noise Ratio²	250:1		1000:1
Dynamic Range³	1300:1		30000:1
Integration Time	8ms ... 20 seconds		10ms ... 60 seconds
Stray Light	< 0.05% @ 600nm		< 10^-4 @ 400nm⁴
	< 0.10% @ 435nm		< 10^-5 @ 633nm⁵
Corrected Linearity	> 99.8%		> 99.8%
Dark Noise	50 RMS counts		3 RMS counts
Detector
Type	Linear CCD, Uncooled		2D CCD, Back-Thinned & TE-Cooled
Cooler Temperature	N/A		10 ± 0.05°C
Pixels	2048		1044 x 64
Pixel Well Depth	~ 62,500 electrons		~ 10⁶ electrons
Optical Bench
Design	f/4 symmetrical crossed Czerny Turner		f/4 symmetrical crossed Czerny Turner
Focal Length	42mm input, 68mm output		101.6mm (input & output)
Shutter	N/A		Electro-mechanical
Order Sorting Filter	200-850nm	350-1000nm	250-850nm	350-1050nm
Fibre Optic Connector	SMA 905 to 0.22 NA optical fibre		SMA 905 to 0.22 NA optical fibre
Electrical
Interface	USB 2.0		USB 2.0
Power Consumption	250mA @ 5VDC		3.5A @ 5VDC
Physical
Dimenions	89.1 x 63.3 x 34.4mm		211 x 329 x 89mm
Weight	190g		5.04kg
Required, Sold Separately
Software	LightMtrX
Accessories Included
	USB interface cable, 3m
	Optical fibre, 2m (SMA-to-SMA)
	SMA adaptor to ½-inch integrating sphere ports (SMA-050-SF/SL)

1. Spectral range of a spectroradiometer system may be limited by the spectral range of the lamp used to calibrate the
system
2. At full signal
3. For a single acquisition
4. For an Illuminant A source
5. For a Helium Neon laser