A B C D 1294 158 4000 A 10º 48’ 01460 400 1.26µ 14º 80’ 01602 600 2.5µ 49º 00’ 01590 600.19 1.35µ 28º 00’ 01650 1200 5000 A 17º 27’ 01640* 1200 44µ 10º 22’

E F G H 135x265x45 128x254 A100 165x265x45 154x254 A110 220x265x45 204x254 A120

Diffraction Products currently offers a limited selection of high quality, high-resolution large astronomical gratings. We can, however, provide custom astronomical rulings in sizes up to 306 mm x 508 mm.

Table IV:          ECHELLES

A	catalog number	D	Blaze angle	G	ruled area length x width (mm)
B	grooves per mm	E	schematic illustration	H	2nd catalog number
C	Blaze wavelength (Littrow)	F	blank dimension (mm)

A B C D E01760 30 ALL 63º E01082 30 ALL 62º E01095 43.57 ALL 59º E01120 60 ALL 50º E01130 73.25 ALL 63º E01211 75 ALL 63º E01213 80 ALL 63º E01291 150 ALL 63º E01770 300 ALL 60º E01451 300 ALL 63º

E F G H 30x30x10 26x26 26S 58x58x10 52x52 52S 68.6x68.6x10 64x64 64S 110x110x16 102x102 102S 60x150x25 56x128 128OB 110x220x30 102x206 2206OB 135x220x30 128x206 8206OB 135x265x45 128x254 8254OB

Prices for echelles in sizes other than those listed in the table will be quoted on request.