Products: SpectraPro Spectrometers

image of SpectraPro Spectrometers

High-Performance Imaging Spectrographs and Scanning Monochromators

For more than 25 years, SpectraPro spectrometers have set the standard for reliable high-performance spectroscopy. Researchers around the world depend on SpectraPro spectrographs and monochromators for a wide variety of spectroscopic applications, including Raman, fluorescence, photoluminescence, microspectroscopy, absorption, emission, and more.

SpectraPro’s advanced instrumentation utilizes computer-optimized optical systems to ensure high spectral resolution, as well as an astigmatism-corrected design to permit multichannel fiber applications. SpectraPro monochromators and spectrographs give researchers unrivaled experimental versatility via the use of multiple entrance and exit ports plus the ability to operate either as a spectrograph with an array detector or as a scanning monochromator with an exit slit and single-channel detector.

SpectraPro benefits include:

  • Availability of four models
  • Direct digital scanning
  • Interchangeable triple-grating turrets
  • Multiple entrance and exit port capabilities
  • High-throughput optics
  • High spectral resolution
  • Astigmatism-corrected optical system for multichannel applications
  • Software options include powerful 64-bit LightField


Thousands of SpectraPro spectrometers are used in research laboratories worldwide, providing superb spectral data day after day, year after year. The robust, reliable design of the SpectraPro consistently delivers high-resolution, repeatable results. Every SpectraPro spectrograph features an all-reflective design with interchangeable multiple-grating turrets. Grating turrets are under software control, which makes choosing a grating and wavelength range easy and precise.

SpectraPro monochromators and spectrographs are available in four focal lengths: 150, 300, 500, and 750 mm. Unlike instruments that are based on lenses or volume-phase holographic (VPH) gratings, a single SpectraPro can be used from the UV to the IR, with appropriate gratings installed, providing wavelength and resolution flexibility.

Applications for SpectraPro spectrometers include:

  • Raman spectroscopy
  • Fluorescence spectroscopy
  • Photoluminescence spectroscopy
  • Emission spectroscopy
  • Absorption, reflection, transmission spectroscopy
  • Laser-induced breakdown spectroscopy (LIBS)
  • Microspectroscopy


Cherenkov imagingCherenkov photons from one electron. Image courtesy of Rongxiao Zhang (Dartmouth College).
Multiple entrance and exit ports
  • Install multiple sources and detectors*
  • Easily switch between light sources and detectors
  • Manual and motorized port selection options available
  • Maximum experimental flexibility
*Number of ports dependent on SpectraPro model. See data sheet for details.
Interchangeable triple grating turrets
  • Up to three grating turrets can be accommodated per instrument
  • Turrets feature kinematic mounts and self-align to the optical system when installed
  • Optimize system for: wavelength coverage, optical throughput, spectral resolution
Large selection of detection systems
  • Princeton Instruments PIXIS, PyLoN, PyLoN-IR, ProEM, PI-MAX4 and NIRvana cameras
  • Selection of formats including rectangular for increased wavelength coverage and square for spectral imaging applications
  • Front- and back-illuminated devices, as well as deep depletion device
  • PI exclusives eXcelon technology available for reduced etaloning and QE improvement
  • Light sources, single-channel detectors

  • Fiber optics bundles and fiber adapters

  • Filter wheels, sample chambers
  • SpectraHub detector readout system and SpectraSense software for single channel detection
Exclusive High-performance optical coatings
  • Maximum optical system throughput
  • Acton #1900 enhanced aluminum - high et reflectivity from UV to IR
  • Protected silver option with >/= 98% average reflectivity from NIR to 400 nm


Optional IntelliCal Wavelength Calibration System

Wavelength calibration nonlinear optimization provided up to 10X greater wavelength accuracy

  • Dual mercury and neon-argon light source
  • Allows wavelength calibration from UV to IR

Intensity calibration corrects relative intensity of spectra data and removes hardware includes and etaloning effects

  • Includes NIST-traceable LED-based calibration
  • Fully automate operation with LightField spectroscopy software
Powerful LightField software
  • Optional: LightField® (for Windows® 7/8, 64-bit) or WinSpec (for Windows XP®/7/8, 32-bit)
  • Flexible software packages for data acquisition, display, and analysis
  • LightField offers intuitive, cutting-edge user interface, IntelliCal, hardware time stamping, and more. Software sold separately


Acton SpectraPro model comparison and datasheets

Model Focal Length Aperture Ratio PMT Resolution* CCD Resolution** Linear
SP2150 datasheet pdf 150 mm f/4.0 0.4 nm 0.4 nm 4.17 nm/mm
SP2300 datasheet pdf 300 mm f/3.9 0.1 nm 0.14 nm 2.38 nm/mm
SP2500 datasheet pdf 500 mm f/6.5 0.05 nm 0.09 nm 1.52 nm/mm
SP2750 datasheet pdf 750 mm f/9.7 0.03 nm 0.06 nm 1.03 nm/mm

*with 1200 g/mm grating @ 435.8 nm and 10 micron slit width and 4 mm slit height

** with 1200g/mm grating @ 435.8nm 20micron pixel, 20micron slit width

SpectraPro Configurations:

SpectraPro Configurations

See datasheet for more information.

Tip-Enhanced Raman Spectroscopy
TERS - Tip-Enhanced Raman spectroscopy

Laser-Induced Breakdown Spectroscopy
LIBS is considered one of the most convenient and efficient analytical techniques for trace elemental analysis in gases, solids, and liquids. LIBS spectra obtained by the Mars Curiosity Rover have confirmed that our sister planet could have harbored life

Absorbance, Reflectance and Transmission
A measure of the amount of light absorbed by a sample as a beam of light passes through it.

Fluorescence, Phosphorescence, and Photoluminescence Spectroscopy
Fluorescence, phosphorescence and photoluminescence occur when a sample is excited by absorbing photons and then emits them with a decay time that is characteristic of the sample environment.

General Raman
The most common application of Raman spectroscopy involves the vibrational energy levels of a molecule. Incident laser light in the UV, visible or NIR, is scattered from molecular vibrational modes.

Plasma Emission Spectroscopy
The different types of plasma emission spectroscopy can be categorized by how the plasma is generated. Spectra of nuclear fusion plasmas are used to ascertain the chemical species present and other properties.


K. Bagnall, E. Wang et al.
Electric field dependence of optical phonon frequencies in wurtzite GaN observed in GaN high electron mobility transistors
This research uses sensitive micro-Raman measurements to characterize the temperature of GaN transistors.
L. Notoa, H. Swart et al.
Cathodoluminescence mapping and thermoluminescence of Pr3+ doped in a CaTiO3/CaGa2O4 composite phosphor
ProEM 1600 EMCCD and SpectraPro 2300 were part of the experimental setup to probe the properties of the one pot prepared composite phosphor of CaTiO3 and CaGa2O4, cathodoluminescence mapping, thermoluminescence and lifetime measurements were carried out.
M. Yallop, N. Roberts et al.
Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet
A ProEM 1024 EMCCD and a SpectraPro 2155 spectrograph are used in this research by a team from Greeenland, Denmark and the UK to demonstrate the widespread green algae in the ice sheets in parts of Greenland.

Application Notes

Advanced CCD Cameras and Imaging Spectrographs Facilitate Acquisition of Novel Femtosecond Stimulated Raman Spectroscopy Data To Improve SERS Biosensors
Accurate characterization of surface-enhanced Raman spectroscopy (SERS) biosensors, fluorescent dye molecules that hold great promise for in vivo bioanalyte detection, can often be quite difficult as the overwhelming isoenergetic fluorescence signal typically makes it challenging to measure resonance Raman cross-sections for the molecules. To overcome this obstacle, researchers at the University of Minnesota in Minneapolis recently utilized etalonbased femtosecond stimulated Raman spectroscopy (FSRS), a technique designed to acquire a stimulated Raman signal without strong fluorescence or interference from signals resulting from other four-wave mixing pathway

Real-Time Imaging of Singlet Oxygen via Innovative Microspectroscopy Instrument
New Two-Dimensional InGaAs Detector Thermoelectrically Cooled to –85°C Facilitates Scientific Research

Scientific NIR-II/ SWIR Cameras Enable Femtosecond Frequency Comb Vernier Spectroscopy
New, Deeply Cooled InGaAs Cameras Provide Ultrahigh Sensitivity for Key Spectral Range

Acquiring and processing Raman spectral data for the C2-D stretching vibration of 2 deuterated histidine
Because of histidine’s importance and unique functionality, we wanted to map out the probe group’s sensitivity to allow for its general use in protein related research.

Solar cell inspection via photoluminescence imaging in the NIR/SWIR
Scientific-grade, deep-cooled, large-format InGaAs FPA cameras such as the NIRvana from Princeton Instruments will enable researchers to observe photoluminescence emission at longer wavelengths and rapidly obtain more detailed information about defects within multicrystalline silicon solar cells.

Tip-Enhanced Raman Scattering (TERS)
Researchers: Samuel Berweger and Prof. Markus Raschke – Department of Physics, Department of Chemistry, and JILA, University of Colorado at Boulder used Princeton Instruments' camera and spectrograph for their research.

Ultra-High-Speed, Time-Resolved Spontaneous Raman Scattering Spectroscopy in Combustion
The recent use of a new diagnostic apparatus to measure the dynamics of each individual molecular species, as opposed to simply acquire bulk information (e.g., pressure), points to the possibility of performing temperature and frequency analyses of species in combustion.

Cherenkov Emission Imaging and Spectroscopy Utilizing Isotopes and a Linear Accelerator
The inability to image Cherenkov radiation in a conventional radiation treatment environment where room light is on raises significant concern for patient and physician compliance; however, the intensified CCD (ICCD) camera system presented here offers a better solution.


Product Manuals
Download operation manuals for Princeton Instruments cameras, spectrometers, and accessories from our ftp site.


LightField 64-bit software - trial download
Download a 45-day free trial of Princeton Instruments' Revolutionary 64-bit data acquisition package for spectroscopy and imaging.

Tech Notes

IntelliCal-Automated wavelength and intensity calibration routines significantly improve accuracy of recorded spectra
Automated wavelength and intensity calibration routines significantly improve accuracy of recorded spectra.

Fully automated wavelength calibration method optimizes data accuracy
Currently offered as a LightField package option, patent-pending IntelliCal® technology from Princeton Instruments enables fast, reliable wavelength calibration with minimal user input.

Tips & Tricks

LightField Tips and Tricks
These tips and tricks focus on LightField features to enhance the user experience when operating Princeton Instruments spectroscopy systems.



ProEM EMCCD Cameras

ProEM EMCCD Cameras

EMCCD cameras for ultra-low light, read noise-limited applications.

NIRvana SWIR InGaAs Cameras

NIRvana SWIR InGaAs Cameras

Scientific grade, cooled InGaAs focal plane array cameras for demanding SWIR imaging and spectroscopy

IsoPlane Imaging Spectrographs

IsoPlane Imaging Spectrographs

Award-winning imaging spectrographs with superior performance over Czerny-Turner traditional designs, available with 203 mm and 320 mm focal length designs.

PIXIS CCD Cameras for Imaging & Spectroscopy

PIXIS CCD Cameras for Imaging & Spectroscopy

PIXIS CCD cameras play a key role in revolutionary research performed in leading labs around the world.

LightField Scientific Imaging & Spectroscopy Software

LightField Scientific Imaging & Spectroscopy Software

Ground breaking software to control your Princeton Instruments systems. Now with Windows 10 support. It's like nothing you have ever experienced!



The reference standard of ICCD cameras. Single photon sensitivity and ultra-fast, <500psec gating

PyLoN Cameras for Imaging & Spectroscopy

PyLoN Cameras for Imaging & Spectroscopy

PyLoN high-resolution front-illuminated, back-illuminated, & back-illuminated deep-depletion imaging & spectroscopy CCDs.

TriVista Triple Spectrometers

TriVista Triple Spectrometers

TriVista spectrometers deliver performance and flexibility unmatched in the industry; a true research grade instrument.

Light Sources

Light Sources

Princeton Instruments offeres a variety of light sources for use with their spectrometers.

Fiber Bundles and Adapters

Fiber Bundles and Adapters

Several different fiber optic bundles are designed specifically for use with Princeton Instruments monochromators and spectrographs.

Filter Assemblies

Filter Assemblies

Our filter wheel assemblies are designed to hold up to six (6) 1.0” (25.4mm) diameter samples or filters.

Single Channel Detectors

Single Channel Detectors

A wide variety of single channel detectors for use with IsoPlane, SpectraPro and TriVista systems.

Grating and Turret Accessories

Grating and Turret Accessories

There are significant advantages of multi-grating turrets in spectrometers.



Princeton Instruments monochromators and spectrographs use diffraction gratings as the optical element which separates (disperses) polychromatic “white” light into individual wavelengths (colors).

IntelliCal Spectral Calibration System

IntelliCal Spectral Calibration System

Fully automated, spectral calibration system - for up to 10x more wavelength accuracy and instrument independent results

Princeton Instruments