cas 120-hr

Successor To CAS 120-HR

CAS 120B-HR high resolution spectroradiometer is the successor of Instrument Systems’ very successful CAS 120-HR with enhanced spectral resolution. Particularly designed for the measurement of narrow band emitters, e.g. laser diodes and VCSELs. The CAS 120B-HR combines high spectral resolution and short testing times for sophisticated and price-sensitive production and laboratory applications.

The CAS 120B-HR achieves very high spectral resolutions down to 0.12 nm (0.05 nm data point interval) for a spectral measuring range of 80 nm. Further spectral ranges in the NIR and VIS are available upon request.

A back-thinned and back-illuminated CCD array sensor with 2048 x 16 pixels is used for detection in the CAS 120B-HR. This sensor design in combination with hardware binning of the vertical pixels offers a high level of sensitivity and large dynamic range (5500 : 1). The CCD allows capturing the spectrum of an optical emitter in a single exposure. Additionally, short integration times down to 4 ms make the CAS 120B-HR particularly suitable for the measurement of emitters with pulsed and continuous operating modes. 


Narrow Band Emitters e.g. Laser Diodes and VCSEL  | Production Testing | Laboratory

CAS 120-HR Spectroradiometer

  • High resolution down to 0.2 nm FWHM, 0.05 nm data point interval
  • High-performance and cost-effective for production and laboratory
  • Down to 4 ms integration time
  • Integrated density filter wheel

CAS 120-HR Spectroradiometer

ModelCAS 120B-HR High Resolution Array Spectroradiometer
Spectral Range ¹⁾800 ~ 1000 nm
DetectorBack-thinned back-illuminated CCD 
Number of pixels2048 x 16
Gratings1800 lines/mm
Measuring ranges (typical)80 nm
Spectral resolution (typical)0.12 nm
Data Point Interval (typical)0.05 nm
Wavelength Accuracy²⁾± 0.05 nm
Integration time4 msec ~ 20 sec 
Sensor dynamic range³⁾5500:01:00
Non-Linearity± 0.6%
Focal length, f number, gratingapprox 120mm, f/3.5, plane reflection grating
Filter wheelAvailable density filters: OD 0.5, 1, 1,5, 2, 2,5
Electrical Data
AD converter16 bit resolution
PC interfaceUSB 2.0
TriggeringInput: TLL ascending slope; output: 2 TTL outputs (software controlled), 1 TTL output with flash pulse
Baseline noise⁴⁾±400 counts or  ±2.5%
Dimension (H x W x D mm)147 x 343 x 317 mm
Power supplyWide-range input 100 VAC to 240 VAC 50/60 Hz
Power consumptionmax. 35 VA
Ambient temperature15 – 35 °C; relative humidity 70 % max., non-condensing
Weightapprox. 7 kg
Standards complainceIn conformity with EN 61010-1:2002-08 (safety requirements governing electrical equipment
for measurement, control and laboratory use)

1) Further spectral ranges upon request.
2) Applies to Penray lamp or laser.
3) For a single acquisition with 4 ms integration time.
4) At shortest integration time, without averaging and at 30,000 counts signal level. When averaged, this value improves (e.g. averaged over 9 times equals a threefold noise reduction).
Instrument Systems is continually working to develop and improve its products. Technical changes, errors or misprints do not constitute grounds for compensatio