Exemplar LS: Smart CCD Spectrometer

The Exemplar® LS from B&W Tek is a smart CCD spectrometer that is optimized for low straylight using an unfolded Czerny-Turner spectrograph. It features on board data processing, temperature compensation, and USB 3.0 communication.

The Exemplar LS is also optimized for multi-channel operation, and features gate jitter and ultra-low trigger delay. The Exemplar LS also has a 2048 element detector and an integrated 16-bit digitizer with readout speed >2.0 MHz.

As a standard configuration, the Exemplar LS is provided with the following: a ruled grating (600 mm/250 nm), wavelength range of 200 - 850 nm, an LVF filter, a spectral resolution of 1.5 nm, and 25 µm slit.

Applications:

The key applications of the Exemplar LS are as follows:

  • UV, Vis, and NIR: Spectroscopy/spectroradiometry/spectrophotometry
  • Reflectance/ absorbance/transmittance
  • Kinetic reaction monitoring
  • Multi-point sampling
  • Wavelength identification
  • Transient spectral analysis
  • OEM systems integration

Features

The key features of the Exemplar LS are as follows:

Smart:

On-board processing including smoothing, averaging, and dark compensation

Speed:

Obtains and transfers over 900 spectra/second at an integration time of 1050 µs

Synchronous:

Supports up to 32 devices with gate jitter (+/- 5 ns) and ultra-low trigger delay (35 ns)

Signal to noise ratio:

On-board Averaging 1 ~295
On-board Averaging 10 ~929
On-board Averaging 100 ~2450

Additional features:

  • Temperature compensation for ultra-low thermal drift
  • Minimum integration time of 1 ms
  • Low straylight spectrograph
  • Spectral resolution <0.4 nm
  • Readout speed >2.0 MHz
  • UV - Vis (200 nm – 850 nm)

Specifications

The key specifications of the Exemplar LS are as follows:

   
Power Input USB @ < 0.5 Amps
Detector Type Response Enhanced Linear CCD Array
Wavelength Range 200 nm - 850 nm
Detector Pixel Format 2048 x 1 Elements @ 14 µm x 200 µm Per Element
Spectrograph f/# 3.6
Spectrograph Optical Layout Czerny-Turner
Dynamic Range 1300:1 Single Acquisition
Digitizer Resolution 16-bit or 65,535:1
Readout Speed >2.0 MHz
Data Transfer Speed > 900 Spectra per Second in Burst Mode
Trigger Delay 35 ns +/- 5 ns
Minimum Integration Time 1 ms, Adjustable in 1µs Increments
Thermal Drift ~29 Counts/°C (Max)
Aux Port External Trigger, Digital IOs
Operating Temperature 5 °C - 35 °C
Operational Relative Humidity 85% Noncondensing
Weight ~ 0.8 lbs (0.37 kg)
Dimensions 4.9 in x 3.6 in x 1.4 in (124 mm x 91 mm x 35 mm)
Computer Interface USB 3.0 / 2.0
Operating Systems Windows: 7, 8 (32-bit & 64-bit)

 

Technical Details

The following are the technical details of the Exemplar LS:

Spectrograph

Entrance slit

Slit Option Dimensions Approx. Resolution 350-750 nm
10 µm 10 µm wide x 1 mm high ~0.4 nm
25 µm 25 µm wide x 1 mm high ~0.6 nm
50 µm 50 µm wide x 1 mm high ~1.0 nm
100 µm 100 µm wide x 1 mm high ~1.6 nm
200 µm 200 µm wide x 1 mm high ~3.0 nm
Custom Slit Widths Available

 

Diffraction grating

Best Efficiency Spectral Coverage (nm) Grating
UV 200 - 400 1800/250
UV-NIR 200 - 850 600/250
Custom Configurations Available

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