Spectrometer Accessory · Gratings

Plane ruled gratings

Plane Ruled Diffraction Gratings

Reflective plane ruled gratings from 600 to 3600 lines/mm, blazed between 200 nm and 1000 nm, with 60–80 % efficiency at the blaze wavelength — the dispersive element for spectrometers, monochromators, spectrophotometers and biochemical instruments.

600–3600 l/mm

Groove densities

200–1000 nm

Blaze wavelengths

60–80 %

Efficiency at blaze

Plane Ruled Diffraction Gratings — Best for: Replacing or specifying the grating in a spectrometer or monochromator around a target wavelength.

Features

Up to 80 % efficiency
Blaze wavelengths from 250 to 1000 nm available
Float-glass substrate, 60/40 surface finish
350 mJ/cm² damage threshold at 200 ns pulses; 40 W/cm² CW

Applications

Spectrometers and monochromators
Spectrophotometers
Biochemical instruments

Standard models

Sizes are width × height × thickness. Model codes follow G-<lines/mm>-<blaze nm>-<size>.

Model	Lines/mm	Blaze wavelength	Blaze angle	Size (mm)
G-600-250-12.7	600	250 nm	4° 18′	12.7 × 12.7 × 6
G-600-500-12.7	600	500 nm	8° 37′	25 × 25 × 10
G-600-500-25	600	500 nm	8° 37′	25 × 25 × 10
G-600-640-25	600	640 nm	11° 4′	12.7 × 12.7 × 6
G-600-750-12.7	600	750 nm	13° 0′	12.7 × 12.7 × 6
G-600-750-25	600	750 nm	13° 0′	25 × 25 × 10
G-600-1000-25	600	1000 nm	17° 27′	25 × 25 × 10
G-1200-250-25	1200	250 nm	8° 37′	25 × 25 × 10
G-1200-300-12.7	1200	300 nm	10° 22′	12.7 × 12.7 × 6
G-1200-500-25	1200	500 nm	17° 27′	25 × 25 × 10
G-1200-640-25	1200	640 nm	22° 35′	25 × 25 × 10
G-1200-750-25	1200	750 nm	26° 44′	25 × 25 × 10
G-1200-1000-25	1200	1000 nm	36° 52′	25 × 25 × 10
G-1800-250-12.7	1800	250 nm	13° 0′	12.7 × 12.7 × 6
G-1800-300-25	1800	300 nm	15° 40′	25 × 25 × 10
G-1800-500-25	1800	500 nm	26° 44′	25 × 25 × 10
G-2400-250-12.7	2400	250 nm	17° 27′	12.7 × 12.7 × 6
G-2400-250-25	2400	250 nm	17° 27′	25 × 25 × 10
G-3600-200-25	3600	200 nm	21° 6′	25 × 25 × 10

Technical Specifications

Plane ruled gratings Specifications

General specifications

Type	Reflective plane ruled diffraction grating
Groove density	300–3600 lines/mm
Blaze wavelength	250–1000 nm
Efficiency	60–80 % at the blaze wavelength
Substrate	Float glass
Surface finish	60/40
Dimensional tolerance	± 0.5 mm
Damage threshold	350 mJ/cm² at 200 ns pulsed; 40 W/cm² CW

We confirm sizes, variants and compatibility with your spectrometer before quotation.

Pairs With

Spectrometers and Accessories

Light source

HLS-1000

Absorbance, transmittance and reflectivity measurements from the visible into the near infrared.

TG-Series External Trigger Boxes EX-TA and EX-TB

Synchronisation

EX-TA / EX-TB trigger boxes

Pulsed-laser experiments — LIBS, time-gated fluorescence — where the spectrometer has to fire in step with the source.

Fibres

Optical fibres

Connecting spectrometers, light sources, cuvette holders and probes.

All fibre-optic spectrometers, probes and accessories

Configure the Plane ruled gratings for your measurement

Tell us the wavelength range, the resolution you need and what you are measuring; we will propose the grating, slit and accessories to match.