Multi-Channel Spectrometers

Multichannel Spectrometer

 

PPO-Multichannel SPECTROMETER

 

High performance multi-channel spectrometers based on gel gratings can be used as a robust, low cost replacement of multiple spectrometers. The unique P&P Optica transmission based design allows for monitoring of up to 200 separate channels all in a single exposure. Channels can each resolve up to 1000 separate spectral points. The system also provides signal to noise ratio (SNR) of more than 5000:1 per single channel (multiplexing several channels significantly improves the SNR).

 

P&P Optica’s multi-channel spectrometers use multi fiber input so that each fiber’s dispersed spectrum is projected onto a two dimensional detector. The number of channels available is limited by the length of the spectrometer entrance slit, dimensions of the detector array, the diameter of input fibers and the distance between the fibers as selected to ensure acceptable crosstalk level.

 

Multi-channel spectrometers are exceptional in characterizing objects from many directions at the same time. This ability is particularly useful in optical topography and tomography applications. Specific applications can range from measuring oxygenation of cancerous tumours at many locations within the tumour; observing complicated plasma reactions; remote sensing applications; analyzing the mixing level of a mixture at many points within the mixing tank; measuring several different processes of a production line at the same time and characterizing spectral response of light sources.

  • Up to 200 individual channels. 
  • Centralized system, no inter-channel synchronization problems.
  • Cost effective solution, no duplication of spectrometers nor of supporting spectrometer accessories.
  • Non-scanning system enables low-light, time dependent measurements.
  • Compact and rugged for industrial applications.

Number of Channels Up to 200, dependent on detector and fiber size.
Spectral Bandwidth Multiple options available within the 250 nm – 2500 nm spectral region.
Absolute Diffraction Grating Efficiency Peak: >95%, average: 70-90%; depending on bandwidth size.
Stray Light <1x10-5 or 0.001%
SNR Multiplier up to 32x increase in SNR1 , camera dependent.
Dispersion (nm/pixel) <0.025
Spectral Resolution (nm) <0.05, wavelength and bandwidthh dependent
Camera Option Gated, high sensitivity cameras, including back thinned CCD, Intensified CCD and others. Cameras are selected to provide best price to performance. Maximum usable size: 28 x 14 mm.
Optical Input Multimode fibre bundle in various configurations, telescope objective, C-mount interconnect and other options available.
Slit Length Variable, matching detector size up to 25 mm.
Slit Width Fixed or variable, selected to optimize resolution versus signal throughput (minimum 5 microns).
Shutter Optional, mechanical.
Dimensions 10 cm x 11 cm x 28 cm
Weight <3 kg

 

1 SNR multiplier is a value calculated by taking the square root of the number of rows on a detector used in binning mode. PPO’s patented optical design allows it to illuminate large CCD or CMOS arrays with no optical abberations. This allows it to dramatically increase the SNR of the Raman signal.

Multi-channel Screen

Multichannel Screen capture

Multi-channel Bundle

Multi Cable bundle