RULED GRATINGS FOR X-RAY AND FAR ULTRAVIOLET SPECTRA.

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Abstract:

A new process for making ruled gratings is described. A protective film of molybdenum and gold of about 300 A is sputtered on blanks of glass or quartz. A sharp pointed diamond properly loaded is used to cut a fine ruling through the protective film and slightly into the blank. Hydrofluoric acid is then used to etch a groove of the required depth and width. The grating is then coated with a reflectance coating of gold or platinum to increase its efficiency. With close control of the ratio of flat to groove width, one should be able to make a grating which maximizes intensity for a desired order and minimizes it for other selected neighboring orders. Technical details on various parts of the process are described. Author

Author(s):
Bearden, J. Alvin
Author Organization(s):
JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF PHYSICS
Descriptive Note:
Final rept. 1 Apr 67-30 Sep 69,
Pagination:
0037

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFCRL-69-0524
Contract/Grant Number(s):
F19628-67-C-0200
Task Number(s):
668801
Project Number(s):
AF-6688
Monitor Series:
69-0524
 Subject Terms
Communities of Interest:
Materials and Manufacturing Processes
Descriptor(s):
(*X RAYS, DIFFRACTION GRATINGS), (*ULTRAVIOLET EQUIPMENT, DIFFRACTION GRATINGS), (*DIFFRACTION GRATINGS, MANUFACTURING), SPUTTERING, ETCHING, REFLECTION, ELECTRON MICROSCOPY
Field(s)/Group(s):
Optics, Nuclear Physics and Elementary Particle Physics
Report Date:
1969 Nov 21