Accession Number:

AD0641815

Title:

FOCAL PROPERTIES OF A PLANE GRATING IN A CONVERGENT BEAM,

Descriptive Note:

Corporate Author:

ATMOSPHERIC SCIENCES LAB WHITE SANDS MISSILE RANGE N MEX

Personal Author(s):

• Hall,James T.

Report Date:

1966-02-01

Pagination or Media Count:

30.0

Abstract:

Focusing from a plane grating can be accomplished by using convergent radiation incident on the grating in such a manner that any incident angle and the resulting diffraction angle will be on the same side of the grating normal. The theory for the focal properties is developed by applying Fermats principle of least time to selected terms resulting from a finite series expansion of the systems distance function. Derivations are given for finding the focal curve equation, astigmatism and coma, of the most usable configuration of the optical components. Discussions of the aberrations disclose methods for eliminating the astigmatism and reducing the coma. Author

Descriptors:

• *GRATINGS(SPECTRA)
• FOCUSING
• OPTICAL IMAGES
• ENERGY
• MIRRORS
• DETECTORS

Subject Categories:

• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE