Concave gratings

Patent

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G02B 518

Patent

active

043125697

ABSTRACT:
A concave grating having grooves formed in a concave blank surface in which the grooves are so formed as to have a non-uniform, spacing in accordance with the following relationship: ##EQU1## wherein

REFERENCES:
patent: 4012843 (1977-03-01), Harada et al.
Namioka, T,; "Theory of the Concave Grating III Seya-Namioka Monochromator"; Josa, vol. 49, No. 10, Oct. 1959, pp. 951-961.

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