Princeton Instruments Acton SP-2750i 750mm spectrograph

Product Description

Princeton Instruments Acton SpectraPro SP-2750i – 750mm Focal Length Imaging Spectrograph/Monochromator

A research-grade, 750mm focal length imaging spectrograph from Princeton Instruments’ renowned Acton SpectraPro series. The SP-2750i is a high-resolution, triple-grating instrument designed for advanced spectroscopic applications including Raman, photoluminescence (PL), laser-induced breakdown spectroscopy (LIBS), and plasma diagnostics. Built for maximum optical throughput, superior resolution, and imaging capabilities, this instrument represents the gold standard in research spectroscopy.

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🔍 Key Specifications:

📐 Optical System:

• Model: SpectraPro SP-2750i (Acton series)

• Focal Length: 750 mm – excellent dispersion and resolution

• Aperture Ratio: f/9.7 (typical)

• Grating Turret: Triple grating turret (computer-selectable)

• Grating Size: 68 mm × 68 mm (standard)

• Wavelength Range: UV to NIR (dependent on gratings, detector, and coatings)

• Resolution: <0.02 nm (with 1800 g/mm grating, depends on slit width)

• Stray Light Rejection: Excellent – triple-grating design minimizes scatter

🔧 Mechanical & Scanning:

• Wavelength Drive: Precision stepper motor with encoder feedback

• Scanning Speed: High-speed scanning available

• Wavelength Accuracy: <0.05 nm (typical)

• Repeatability: <0.005 nm

📡 Imaging Capability:

• Imaging Spectrograph: Corrected optics maintain spatial resolution along slit

• Slit: Adjustable, micrometer-actuated

• Output Ports: Multiple ports (axial, lateral) for detector mounting

🖥️ Control & Interface:

• Control: USB, RS-232, or IEEE-488 (GPIB) options depending on vintage

• Software Compatible: Princeton Instruments WinSpec, LightField, or third-party control via LabVIEW, MATLAB, Python

• Accessories Compatible: Accepts Princeton Instruments CCD, ICCD, EMCCD, InGaAs, and PMT detectors

✅ Condition & Notes:

• Origin: University or government research laboratory decommission

• Cosmetic: Professional lab appearance – may show light handling marks. Optics presumed clean (not inspected internally).

• Operational Status: Untested – power not applied

• Includes: (1) Princeton Instruments Acton SP-2750i spectrograph body. No gratings, detectors, cables, or software included unless specified.

• Critical Disclaimer: Internal condition unknown. May require factory recalibration. Gratings may need replacement if damaged by environmental exposure.

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⚙️ Why This Instrument is Exceptional:

🔬 750mm Focal Length – The Sweet Spot for High Resolution:
The 750mm focal length offers:

• Excellent dispersion – separate closely spaced spectral lines

• High spectral resolution – resolve fine structure in Raman, PL, atomic emission

• Large numerical aperture – high light throughput for weak signals

• Imaging capability – preserve spatial information along slit

🎯 Triple Grating Turret – Unmatched Versatility:

• Instant grating changes – switch between survey scans and high resolution without breaking vacuum/ purge

• Wide spectral coverage – from deep UV to NIR with appropriate grating sets

• Optimized for multiple techniques – Raman, PL, absorption, emission, LIBS

📡 Research-Grade Imaging Performance:

• Astigmatism-corrected optics – sharp images across entire focal plane

• Ideal for multi-track spectroscopy – fiber arrays, multi-sample analysis

• Compatible with 2D CCD/ICCD detectors – capture full spectral and spatial information

🏛️ Acton SpectraPro Heritage:
The Acton SpectraPro series is legendary in the spectroscopy community for:

• Mechanical robustness – precision components, stable over decades

• Optical excellence – superior imaging and stray light rejection

• Modularity – adapts to evolving detector and laser technologies

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🛠️ Applications & Uses (If Restored/Functional):

🔬 Raman Spectroscopy:

• Confocal Raman microscopy – high-resolution chemical imaging

• Resonance Raman – UV/visible excitation studies

• Surface-enhanced Raman (SERS) – trace detection

💡 Photoluminescence (PL):

• Semiconductor bandgap analysis – quantum dots, 2D materials, perovskites

• Time-resolved PL – with ICCD or streak camera detection

• Cathodoluminescence – with electron beam excitation

⚡ Laser-Induced Breakdown Spectroscopy (LIBS):

• Elemental analysis – metals, minerals, environmental samples

• Standoff detection – with appropriate collection optics

🔋 Plasma Diagnostics:

• Fusion energy research – tokamak, stellarator plasma monitoring

• Industrial plasma processing – etch, deposition endpoint detection

🧪 Absorption & Emission Spectroscopy:

• Atomic absorption/emission – elemental quantification

• Molecular absorption – gas phase, solution studies

• Fluorescence – steady-state and time-resolved

🔭 Astronomy & Atmospheric Science:

• Solar spectroscopy – Fraunhofer line analysis

• Atmospheric remote sensing – DOAS, LIDAR receiver