Optical Holographic Gratings - Plane Gratings Family

The extremely flexible holographic technique can create many grating configurations — planar, curved (for example concave and toroidal), aberration-corrected, with uniform and non-uniform groove spacings.

Holographic gratings are the type of choice for the visible and UV. They typically exhibit less stray light and "ghosts" than classically ruled gratings, because they have fewer random and systematic imperfections.

Today, most gratings are holographically produced. The grating is made by means of interfering light patterns, produced from laser sources, on a substrate coated with photoresist film. After exposure, the pattern is etched into the substrate to make the master grating. Blazing (shaping the grooves) of the grating is accomplished by means of a chemical etch, possibly followed by an ion etch to achieve the desired blaze shape. Groove density ranges from 65 to more than 5,000 grooves/mm.

Curved gratings allow for simplified designs in aberration-corrected optical devices, because a single curved grating can often replace a plane grating and one or two curved mirrors.

The table below lists the range of plane holographic gratings available from HORIBA Jobin Yvon.

The last three digits of the reference number indicate the size of the grating. Select these digits from the Size Table that appears just after the following table and replace the xxx in the latter table with the digits.

Holographic gratings are available in sizes up to 400 mm diameter.

HOLOGRAPHIC PLANE GRATINGS
Grooves per mm	Spectral Range (nm)	Reference Number & Efficiency Curve
5760	100-300	520 01 XXX
4960	100-350	520 02 XXX
4320	100-300	520 05 XXX
4320	170-400	520 04 XXX
3600	150-450	520 07 XXX
3000	250-500	520 09 XXX
2400	100-300	520 14 XXX
2400	170-500	520 13 XXX
2400	300-650	520 12 XXX
2000	100-300	520 18 XXX
2000	150-450	520 17 XXX
2000	190-700	520 16 XXX
2000	450-750	520 15 XXX
1800	100-300	520 22 XXX
1800	150-450	520 21 XXX
1800	190-700	520 20 XXX
1800	450-850	520 19 XXX
1200	100-300	520 27 XXX
1200	150-450	520 26 XXX
1200	190-900	520 25 XXX
1200	400-1300	520 24 XXX
600	150-450	520 30 XXX
600	400-1500	520 29 XXX
150	250-800	520 32 XXX
150	400-1200	520 33 XXX