There are a wide range of ruled master gratings. Typical goove density range of the plane ruled gratings is from 20 lines/mm to 1800 lines/mm. Standard coating is aluminum. On request, MgF2, Gold or platinum are also available.
Note: The sizes listed in this table are the maximum ruled areas. All gratings can be replicated to a smaller size and directly ordered. If you need a grating area more than ruled areas in the table or other specification, you must contact us in advance.