$1200 lines/mm grating Optical Diffraction Grating – Precision Spectral Dispersion for Laser & Imaging Systems$ $1200 lines/mm grating Optical Diffraction Grating – Precision Spectral Dispersion for Laser & Imaging Systems$ $1200 lines/mm grating Optical Diffraction Grating – Precision Spectral Dispersion for Laser & Imaging Systems$ $1200 lines/mm grating Optical Diffraction Grating – Precision Spectral Dispersion for Laser & Imaging Systems$

1200 lines/mm grating Optical Diffraction Grating – Precision Spectral Dispersion for Laser & Imaging Systems

1200 lines/mm diffraction gratings cover ruled, holographic and blazed profiles with selectable blaze wavelengths at 240nm, 250nm, 360nm, 500nm, 700nm and 750nm across UV (190–400nm), visible (400–780nm) and NIR (780–1200nm) bands.

First-order peak efficiencies range 60–80% at the blaze wavelength (≈63% holographic Vis, up to 80% ruled 360nm/750nm variants), on fused silica, N-BK7 or float glass substrates in 12.7×12.7, 25×25 and 25×50mm apertures.

Description

Optical Diffraction Grating – Precision Spectral Dispersion for Laser & Imaging Systems
Common Types
1. Ruled Grating – Mechanically diamond-ruled on metal or glass; cost-effective for general spectroscopy.
2. Holographic Grating – Produced by laser interference patterning; very low stray light, ideal for fluorescence and Raman.
3. Blazed (Echelle) Grating – Angled groove facets concentrate most energy into a single order; used in high-efficiency monochromators and astronomy.
4. Transmission Grating – Light passes through; compact, used in laser line pickups and OEM sensors.
5. Reflection Grating – Most common in spectrographs; can be mounted in Littrow or Czerny-Turner configurations.
6. Custom / Coated Grating – UV-grade fused silica, IR materials (ZnSe, CaF₂), or metallic (Au/Al) coatings for specific wavelength bands from 190nm to 14µm.

Key Features
- High spectral resolution (R up to 10⁵+ with echelle types)
- Groove density: 100–2,400 lines/mm
- Efficiency: 60–95% peak (blazed/holographic optimized)
- Low polarization dependence (holographic) or high efficiency in selected order (blazed)
- Available in UV, VIS, NIR, and IR versions
- Substrate options: BK7, fused silica, quartz, ZnSe, Ge, CaF₂

Typical Applications
- Spectrometers & Monochromators – Material analysis, chemical identification, plasma diagnostics
- Raman & Fluorescence Microscopy – Holographic gratings minimize stray light for ultra-weak signal detection
- Laser Systems – Wavelength tuning, pulse compression (chirped gratings), mode-locking, OPO pumping
- Telecom – DWDM multiplexing/demultiplexing (transmission gratings)
- Astronomy – Echelle spectrographs for stellar composition and radial velocity measurement
- Machine Vision & Machine Sensing – Laser line spectral filtering, barcode/spectrum sensors
- Education & Metrology – Wavelength calibration (e.g., Hg-Ar lines), optical bench experiments

Why Choose a Grating Over a Prism?
- Linear(ish) wavelength dispersion (easier calibration)
- Higher resolution in compact form factor
- Customizable efficiency peaks and order selection
- Works across broad spectral ranges with right coating/material

Whether you need a 600 lines/mm holographic grating for a Raman probe, a 1,200 lines/mm blazed grating for a UV-Vis spectrometer, or a custom echelle for astronomical spectroscopy, diffraction gratings provide the precision dispersion modern photonics demands.

Explore our full range of stock and custom optical gratings — ruled, holographic, blazed, and echelle — with substrates and coatings for every wavelength from deep UV to long-wave IR.