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Applied Optics

Applied Optics


  • Vol. 21, Iss. 23 — Dec. 1, 1982
  • pp: 4356–4362

Blaze characteristics of echelle gratings

Sonja Engman and Peter Lindblom  »View Author Affiliations

Applied Optics, Vol. 21, Issue 23, pp. 4356-4362 (1982)

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A new model for the blaze function of the two in-plane mountings of echelle gratings is described and extended to account for defects in the edges of the grooves. Expressions for the relative efficiency are given. The model shows that the wavelength for the maximum blaze intensity differs slightly from the wavelength λ0 satisfying mλ0 = d[sinα + sin(2θα)], the difference being a function of the spectral order. The off-blaze orders of the wavelengths diffracted at the central blaze for the mounting α < θ (α = angle of incidence, θ = blaze angle) lie at the minima of the blaze function for a perfect echelle. Results are given from measurements of the blaze angle and the groove edge defects of three echelles.

© 1982 Optical Society of America

Original Manuscript: April 17, 1982
Published: December 1, 1982

Sonja Engman and Peter Lindblom, "Blaze characteristics of echelle gratings," Appl. Opt. 21, 4356-4362 (1982)

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