Raman / PL Spectroscopy
The HOLMARC CRM226HX2 Confocal Micro Raman Spectrometer is a high-performance, research-grade system designed for precise micro-Raman spectroscopy, chemical imaging, and materials characterization. Built on a true confocal optical architecture, the system delivers sub-micron spatial resolution, high spectral accuracy, and excellent repeatability, making it well suited for applications in materials science, semiconductors, nanotechnology, and life-science research.
The CRM226HX2 integrates an advanced multi-laser excitation system (532 nm and 785 nm), a high-resolution Czerny–Turner spectrometer, and a fully motorized confocal microscope with precision XYZ mapping. Comprehensive software enables 1D, 2D, and 3D Raman imaging, automated calibration, and advanced spectral analysis. With a modular, future-ready design supporting additional lasers, detectors, polarization analysis, and environmental stages, the CRM226HX2 offers a powerful and scalable solution for modern Confocal Raman research.
The spectrometer employs a Czerny-Turner configuration with a grating turret. To ensure precise focusing and collimation, aberration-corrected 400 mm FL parabolic mirrors are utilized. These mirrors are coated with high-reflective protected aluminium for optimal performance within the spectrometer and microscope.
At the entrance port, a variable slit is provided, allowing fine adjustments using a micrometer control. The spectrometer employs a cooled linear CCD array detector as its primary sensor. (We can supply a range of detectors including EMCCD to suit specific requirements.) Exposure time can be adjusted via software, ranging from milliseconds to minutes. For enhanced resolution and repeatability across the entire wavelength range, the spectrometer utilizes an encoder-based grating rotation mechanism.
The system features a standard 532 nm low-noise laser with a spectral resolution of 0.06 nm and high stability. This laser is equipped with a Raman filter set for optimal performance. Additionally, the spectrometer has the capability to accommodate two more lasers, which can be selected using the motorized stage. The spectrometer offers various grating turret configurations, including single, double, and triple gratings. A single shot can capture a Raman spectrum range spanning from 100 cm⁻¹ to 3500 cm⁻¹. If needed, the spectrometer’s wavelength can be adjusted to cover a spectrum beyond 3500 cm⁻¹. The measurements can be performed using the stitched scanning option as well, which spans the entire wavelength range from 200nm to 1050nm (subject to variations based on the grating and detector used).
Spectra Overlay Feature
Visual representation of Raman spectrum from graphical style
Raman / PL mapping
| Raman Spectrometer | |
| Spectrometer Type | Czerny–Turner |
| Optical Design | Abberation Corrected high-throughput spectrograph |
| Focal Length | 400 mm |
| Focal Ratio | f/4 |
| Grating Turret | Triple-grating motorized turret |
| Encoder feedback resolution | 0.001125° |
| Gratings Supplied | 300 l/mm, 600 l/mm, 1200 l/mm |
| Optional | 900 / 1800 / 2400 / 3000 / 3200 l/mm |
| Grating Exchange | Motorized, software-controlled, no realignment required |
| Raman Spectral Range | 100 cm⁻¹ to 6000 cm⁻¹ |
| Rayleigh Filter | Motorized Rayleigh filter switching |
| Thermal Stability | Thermally isolated spectrometer housing |
| Photoluminescence & Upconversion Spectral Range | 350 - 1050 nm |
| PL Measurement Capability | Included with required accessories |
| Fluorescence Background Correction | Automated |
| Calibration | Neon lamp (wavelength calibration) |
| Silicon standard (Raman shift validation & intensity correction) | |
| Spectrometer Detector | |
| Low readout noise, high-resolution Spectroscopic line CCD camera | |
| Low readout noise | 4e-rms typ |
| High resolution | Pixel size 12 × 12 um |
| Quantum efficiency | 90% or higher at peak |
| Wide spectral response range | |
| High UV sensitivity and stable characteristics under UV light irradiation | |
| Make | Hamamatsu |
| Type | Binning type |
| Image size | 24.576 x 1.464 mm |
| Number of effective pixels | 2048 x 122 pixels |
| Pixel size | 12 x 12 um |
| Spectral response range | 200 to 1100 nm |
| Line rate (Typ.) | 107 lines/s |
| Line rate (max.) | 203 lines/s |
| Dark current (Typ.) | 30 e-/pixel/s |
| Readout noise (Typ.) | 4 e- rms |
| Type | TE-cooled CCD detector |
| Cooling | Two-stage, -60 °C |
| Window material | AR-coated sapphire |
| Mapping Stage | |
| Mapping Stage | Sample Stage |
| XY Stage | XYMR50 motorized stage |
| Travel | 50 × 50 mm |
| Resolution | 50 nm |
| Z Focus Travel | 25 mm |
| Resolution | 10 nm |
| Sample Holding Capacity | Up to 120 mm |
| Scanning | Programmable, joystick-controlled |
| Chemical imaging, particle counting, size mapping - Included | |
| Controller | HOLMARC XYZ Stepper controller Unit |
| Scanning | Programmable |
| Joystick | 3 Axis Joystick controller |
| Filters & Attenuation | |
| Edge Filter | 532 nm edge filter with ≤100 cm⁻¹ cut-off |
| Neutral Density Filters | Motorized filter wheel |
| Range | 0.01% to 100% transmission Fully software controlled operation |
| Photoluminescence (PL) Filters | Coverage from 532 nm to 1050 nm |
| Filter Wheel | Motorized 8-slot turret for Raman, PL, fluorescence, imaging |
| Spectrometer Coupling | Direct free-space coupling (Fiber coupling - Optional) |
| Fully integrated optical path within a single enclosure | |
| Confocal Performance & Resolution | |
| True / Adjustable Confocal Facility | Motorized confocal pinhole and slit |
| Automated signal optimization | |
| Spatial Resolution | ≤ 750 nm lateral |
| ≤ 900 nm axial @ 532 nm laser | |
| Spectral Resolution (FWHM) | ≤ 0.5 cm⁻¹ |
| Scan-to-Scan Repeatability / Reproducibility | ≤ 0.05 cm⁻¹ |
| Upgradeability |
| The system is designed to be future-ready and supports extensive |
| Confocal Raman–specific upgradations, including : |
| Field upgradation to UV lasers (≤ 325 nm) |
| Support for additional visible and NIR lasers (e.g., 405 nm, 633 nm, 785 nm, 830 nm, 1064 nm) |
| Provision for multiple internal and external laser integration with motorized selection |
| Upgrade to NIR detectors for extended spectral coverage |
| Compatibility with heating and cooling stages for temperaturedependent Raman studies |
| Support for polarization-resolved Raman measurements (horizontal, vertical, and custom angles) |
| Expandable software for advanced Raman imaging and analysis |
Fig. Playback mode.
CRM series Raman spectrometer can take continuous spectra like a video.
It can be played after holding the desired time.
Each spectrum in the video can be exported for further processing.
This feature is really helpful for timed measurements
| Laser | |
| Laser Configuration | Dual-laser system (532 nm & 785 nm) with automatic selection |
| Supports up to 8 lasers internally and externally | |
| Coupling | Direct free-space coupling |
| Fiber-coupled option also supported | |
| Laser Power Control | Motorized ND attenuation wheel (0 - 100%) |
| Fine power control from 0.02% to 100% via software | |
| Laser Power Meter | Included, measurement at sample plane |
| Laser ON / OFF | Fully software controlled |
| Alignment | Auto / manual laser alignment with steering optics |
| Software alignment of laser–Raman–camera path | |
| 532 nm CW Laser | |
| Type | Low-noise variable-power DPSS laser |
| Output Power | 0 - 100 mW |
| Linewidth | Narrow |
| Mode | CW, TEM₀₀ |
| Cooling | TEC, air-cooled |
| Stability | < 2% over 4 hours |
| MTTF | > 10,000 hours |
| 785 nm CW Laser | |
| Output Power | 0 - 300 mW |
| Spatial Mode | Multi-mode |
| Stability | < 3% over 4 hours |
| Cooling | TEC |
| Warm-up Time | < 1 minute |
| MTTF | 10,000 hours |
| Imaging Camera | |
| Sensor Type | CMOS，Global Shutter |
| Pixel Size | 4.0μm × 4.0μm |
| Optical Size | 1 / 2.7" |
| Resolution | 1280 x 1024 |
| Max Frame Rate | 213.9 FPS |
| Effective Sensor Area | 5.12 mm x 4.1 mm |
| SNR | 40 db |
| Sensitivity | 8V / Lux.S |
| Bit Depth | 10 bit |
| Trigger Mode | Hardware Trigger / Software Trigger |
| HDR | 60 dB |
| Exposure Time | 4us-145ms305us |
| Pixel Formats | RAW8, RAW16, BGR24, MONO8, MONO16 |
| Data Interface | USB 3.0 |
| Software |
| Holmarc Micro Spectra Raman Software (Windows-based) |
| Functions include : |
| Raman imaging (1D, 2D, 3D hyperspectral) |
| Auto-calibration (Si, Cyclohexane, Ne/Hg/Ar) |
| Dark-current correction |
| PCA / multivariate analysis |
| Chemical segmentation |
| Scheduled auto-calibration without user input |
| User spectral libraries & material identification |
| System Control and Data Collection software including |
| Software for Sample Viewing |
| Capable of managing user-built libraries and material identification |
Your research requirements are distinct, Holmarc Offers
Hyper Spectral RAMAN IMAGING
The system employed a High-Sensitive 2D detector with a Galvano-Based scanning method.
POLARIZED RAMAN SPECTROSCOPY
The system utilized a motorized Glan-Thompson polarizer rotator for polarization-dependent Raman spectrum measurements.
TEMPERATURE DEPENDANT RAMAN
Temperature control chambers specifically designed for Raman spectrometers offer precise temperature regulation across a wide range, spanning from -195°C to 600°C.
RAMAN SHIFT MEASUREMENTS
The software continuously records changes in the Raman stock and anti-stock lines.
Electro Chemical Flow CELL
Used to obtain in-situ chemical information about the reactions taking place during an electrochemical experiment.
AUTO FOCUS - Live Tracking
Live autofocus tracking is a feature that can help keep the image of a Raman microscope in focus when the stage is moved.
PRESSURE DEPENDANT RAMAN / Environmental Chamber
Environmental control chambers equipped with gas purge capabilities are available. These chambers allow for Raman measurements in the presence of inert gases. Additionally, they enable the study of pressure-dependent differences in Raman spectra for various samples.
# Raman customization
With a rich 30-year history, HOLMARC specializes in product customization. Our unique strength lies in our ability to handle the entire process from design and prototyping to manufacturing from our facilities. We have well-developed facilities for optics, electronics, software, mechanical and fabrication. Be it modifying a standard product or engineering a customized solution, we are equipped to meet specific application requirements. Feel free to contact us for any construction needs or assistance. We are committed to excellence!.
Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.
ISO 9001:2015 Made in INDIA
CIN : L33125KL1993PLC006984
GST No : 32AAACH9492C1ZQ
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B.7., H.M.T. Industrial Estate
H.M.T. P.O, Kalamassery, Kochi
Kerala, India - 683 503
+91 920-719-7772 / 6 / 1
sales@holmarc.com
Mon - Sat : 9 am to 5 pm
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