METICULAB
METICULAB MTL‑GRT Series Flat‑Field Holographic Concave Grating for Spectrometer
METICULAB MTL‑GRT Series Flat‑Field Holographic Concave Grating for Spectrometer
Flat Spectrum, One Element: VLS Flat-Field Concave Grating for Miniature Spectrometers
When your spectrometer needs a flat focal plane for a CCD or CMOS detector, the METICULAB™ Flat-Field Holographic Concave Grating does two jobs in one element — dispersion and focusing — while projecting a flat spectral image directly onto your array detector. Variable line-space (VLS) design corrects astigmatism and coma, simplifying the optical path and shrinking instrument size.
Technical Specifications
| Type | VLS Flat-Field Holographic Concave Grating |
| Groove Density | 200 - 2400 lines/mm, Custom Available |
| Substrate Material | N-BK7 Optical Glass, Fused Silica optional |
| Reflective Coating | Aluminum, Gold, Silver or Custom Coating |
| Radius of Curvature | 30 - 1000 mm, Custom Available |
| Important Notice | Flat-field concave grating, NOT Rowland concave grating. Optical paths are not interchangeable. |
Why METICULAB™ Flat-Field Concave Gratings?
- Flat Focal Plane for Array Detectors: VLS variable line-space pattern corrects astigmatism and coma, projecting spectrum onto a flat plane that directly matches CCD / CMOS detectors.
- One Element, Two Functions: Dispersion and focusing in a single curved grating — fewer optical elements, simpler layout, smaller instrument footprint.
- Low Stray Light, Ghost-Line-Free: Holographic manufacturing suppresses stray light and ghost lines for reliable weak-signal detection.
- Flexible Substrate & Coating: N-BK7 for UV-Vis-NIR, fused silica for deep-UV; aluminum, gold, silver or custom coating.
- Full-Parameter Customization: Groove density, radius of curvature, dimension and mounting options tailored to your optical layout.
Standard Reference Models
| No. | Dimension (mm) | Groove (l/mm) | Spectral Range (nm) | Spectral Width (mm) |
|---|---|---|---|---|
| 1 | Dia48x10 | 200 | 200-800 | 20 |
| 2 | Dia48x10 | 217 | 400-450 | 20 |
| 3 | 42x39x8 | 925 | 195-325 | 12.5 |
| 4 | 33.5x30x5 | 925 | 195-325 | 12.5 |
| 5 | 30x30x10 | 800 | 340-850 | 40 |
| 6 | 30x30x10 | 780 | 200-800 | N/A |
| 7 | Dia70 / 50 / 40 / 20 | 230 | 400-1100 | 23.3 |
| 8 | Dia70 / 50 / 40 / 20 | 405 | 380-780 | 24 |
| 9 | Dia70 / 50 / 40 / 20 | 285 | 190-800 | 25.1 |
| 10 | Dia15x5 (R=30) | 300 | 200-800 | N/A |
| 11 | Dia24.8x23.4 (R=40) | 300 | 200-800 | N/A |
| 12 | Dia35x32.3 (R=60) | 400 | 1100-2500 | N/A |
| 13 | Dia35x32.3 (R=60) | 400 | 800-1500 | N/A |
| 14 | Dia50x10.3 (R=398.83) | 2400 | 180-900 | N/A |
| 15 | Dia56x48x11.5 (R=270) | 1200 | 200-900 | N/A |
| 16 | 20x20 | 730 | 340-800 | 36.5 |
Note: Flat-field grating is optical-path dependent. Please provide wavelength range, curvature, detector size and installation dimension for an accurate proposal. R = radius of curvature (mm).
Applications
Miniature & Portable Spectrometers · CCD / CMOS Multi-Channel Spectral Detection · Fluorescence Spectroscopy · Industrial Gas & Water Monitoring · University & Research Setups
METICULAB™ — Precision Optical Components
📧 choikyuc@gmail.com | 📞 +82-10-3988-4813 | 🌐 www.meticulab.net
METICULAB™ is a precision optical component brand. All gratings are produced in controlled cleanroom environment and monitored by ISO 9001 certified quality management systems.
