Focalization process of spherical concave diffraction gratings

Details Focalization process of spherical concave diffraction gratings Focalization process of spherical concave diffraction gratings

1974-08-16

1976-08-10

Stern, Ronald J.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

350 35, 350162R, 356 79, G01J 312, G03H 104, G02B 532

Patent

active

039738507

ABSTRACT:
Spectrometric gratings formed by holographic techniques are disclosed. The gratings are employed in monochromator mounts of the type in which fixed entrance and exit slits are combined with simple rotation of the grating to scan the spectral range of interest, the angles of incidence and diffraction and the positions of the slits being so related that the mounts are characterized by improved optical performance due to phase balancing and improved focussing properties according both to geometrical and diffraction theories. The parameters involved in the holographic formation of the gratings, specifically the angularities and positions of the point sources forming the holographic image of the grating lines, are specifically related to the characteristics of the mount as to improve further their optical characteristics, particularly with respect to mounts either employing "normal" (i.e., relatively small) angles of incidence with large grating apertures or employing grazing incidence (i.e., for use in the far ultraviolet region).

REFERENCES:
patent: 3578845 (1971-05-01), Brooks et al.
patent: 3628849 (1971-12-01), Flamand et al.
Meltzer, "Spectrographs and Monochomators", Chapter 3 of Applied Optics and Optical Engineering, vol. 5, Edited by Kingslake, Academic Press, New York, 1969, pp. 63-66, 80-81 relied upon.
Speer et al., Applied Optics, vol. 13, No. 6, June 1974, pp. 1258-1261.
Murty et al., Journal of the Optical Society of America, vol. 61, No. 8, Aug. 1971, pp. 1001-1006.
Cordelle et al., Optical Instruments and Techniques 1969, Edited by Dickson, 1970, Oriel Press, pp. 117-124.

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