NWSPEC
Raman Microscope
Raman Microscope
Raman Microscope Selection Guide
Choose the optimal Raman microscopy configuration for your analytical requirements. This guide helps you select the right excitation wavelength and system specifications based on your sample type, application field, and performance needs.
Raman Microscope integrates high-resolution optical microscopy with precision Raman spectroscopy for non-destructive chemical imaging and microanalysis.
Key Decision Factors
- Excitation wavelength — Critical for fluorescence control and sample compatibility
- Sample type — Organic, inorganic, biological, or forensic materials
- Application environment — Laboratory precision vs. field portability
- Detection sensitivity — Signal strength vs. background interference
Step 1: Select Your Excitation Wavelength
The excitation wavelength is the most critical choice for Raman microscopy. Select based on your sample's fluorescence properties and Raman scattering efficiency:
| Wavelength | Best For | Avoid When |
|---|---|---|
| 532 nm (Green) | Inorganic materials, minerals, carbon materials, silicon, semiconductors. High Raman scattering efficiency. | Samples with strong fluorescence (many organics, dyes, biological tissues). May cause photobleaching in sensitive samples. |
| 785 nm (NIR) | General-purpose applications. Good balance of sensitivity and fluorescence suppression. Organic chemicals, polymers, pharmaceuticals. | Highly fluorescent biological samples or deeply colored materials where 785 nm still excites fluorescence. |
| 1064 nm (NIR) | Highly fluorescent samples, biological tissues, forensic samples, dark-colored materials, art/historical artifacts. Maximum fluorescence suppression. | When highest sensitivity is required (Raman intensity decreases with λ⁴). Inorganic materials where 532 nm performs better. |
Step 2: Match System to Your Application
Explosives, narcotics, toxic substances identification. Recommend: 785 nm or 1064 nm for unknown samples with variable fluorescence.
API identification, counterfeit detection, quality control. Recommend: 785 nm for general QC; 1064 nm for complex formulations.
Carbon nanotubes, graphene, semiconductors, thin films. Recommend: 532 nm for maximum signal; 785 nm for general characterization.
Mineral identification, inclusion analysis, field prospecting. Recommend: 532 nm for mineral fingerprinting; portable configuration for field use.
Cell analysis, tissue imaging, metabolite detection. Recommend: 1064 nm essential for biological fluorescence suppression.
Pigment identification, authentication, aging analysis. Recommend: 1064 nm for historical pigments and binders without damage.
Step 3: Choose Your Configuration
Ram-Micro-532
Best for: Research laboratories, materials science, geology
- 532 nm excitation for maximum Raman signal strength
- Ideal for inorganics, minerals, carbon materials, semiconductors
- High sensitivity for weak Raman scatterers
- Full spectral range: 200–4000 cm⁻¹
- Research-grade spectral resolution: 8–15 cm⁻¹
Ram-Micro-785
Best for: General analytical labs, QC/QA, chemical identification
- 785 nm excitation for balanced performance
- Reduced fluorescence vs. 532 nm for organic samples
- Good for polymers, chemicals, pharmaceuticals
- Versatile for mixed sample types
- Standard laboratory workhorse configuration
Ram-Micro-1064
Best for: Forensics, biological samples, dark/fluorescent materials
- 1064 nm excitation for ultimate fluorescence suppression
- Essential for biological tissues, forensic samples
- Safe for heat-sensitive and dark-colored materials
- Lower signal compensated by cooled detector
- Non-destructive analysis of precious samples
Technical Considerations
Spectral Resolution vs. Sensitivity
The system provides 8–15 cm⁻¹ resolution, optimized for chemical identification and fingerprinting. For research requiring higher resolution (< 4 cm⁻¹), consider specialized research-grade systems.
Sample Handling
- Microscope integration: Working distance matched to objective focal length for precise focusing
- Power adjustment: 0–50 mW adjustable to prevent sample damage
- Armored fiber probe: 1 m length for flexible sample positioning
- Non-destructive: Preserves sample integrity for further analysis
Environmental Requirements
- Laboratory use: Standard 0–40°C operating range
- Field applications: Portable DC 12V/5A power compatible
- Storage: -10–55°C tolerance for transport
Quick Selection Guide
- Analyzing minerals, carbon, semiconductors? → Choose Ram-Micro-532
- General chemical ID, polymers, pharmaceuticals? → Choose Ram-Micro-785
- Forensics, biological samples, dark materials? → Choose Ram-Micro-1064
- Unknown sample types? → Start with 785 nm or contact us for method development
- Need field portability? → All configurations support 12V DC operation
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GC Accessories
GC graphite/Vespel sealing gasket
GC injection port split septum
Syringe for GC
Capillary-column chromatography
Inlet Septa for Gas Chromatography
Chromatographic column
Frequently Asked Questions
How can I contact you?
Feel free to call us T+86 189-6516-4839
or email sales@nwspec.com to:
• Place an order
• Ask for a quote
• Or if you have any other questions
You will always get a live person here at NWSPEC; never an automated system!
We are open from 6:00AM - 7:00PM Eastern Time, Monday - Friday.
Where can I find application notes?
If you have any questions regarding the application notes, or can't find the one you are looking for, please contact Sales at sales@nwspec.com
Do you have instructional manuals for your instruments to download?
Yes, we have instructional manuals for our instruments. They can be found on https://nwspec.com/pages/resource .
If you don't see the one you are looking for, please contact: sales@nwspec.com