1986-10-27
1988-07-05
Corbin, John K.
350601, 350629, G02B 2714, G02B 510
Patent
active
047550236
ABSTRACT:
A visor for mounting on a helmet adapted to be worn by an individual, includes a substantially transparent visor having an inner concave surface, and, with reference to an orthogonal, right-handed xyz Cartesian coordinate system of spatial reference having its origin located on the inner concave surface and its z-axis parallel to the line of sight of the individual wearing the helmet, the inner concave surface being defined by a cross-section of the visor in the x-axis of reference, which is symmetrical about both the origin and the y-z plane of reference, having one-half of the cross-section of the visor in the x-axis of reference being a first circular segment containing the origin at one end and connected to its opposite end to one end of a first paraboloid segment which is connected at its opposite end to one end of an elliptic segment whose opposite end forms a side boundary of the visor, and by a cross-section of the visor in the y-axis of reference having a second circular segment, one end of which forms an upper boundary of the visor and an opposite end connected to one end of a third circular segment having its opposite end connected to one end of a second paraboloid segment whose opposite end forms a lower boundary of the visor.
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Scientific American, Dec. 1980, pp. 206-228, "Mirror Images" by D. E. Thomas.
Evans Charles D.
Larkin Eric W.
Tirums Andrew T.
Corbin John K.
Jodziewicz Matthew F.
Kachmarik Ronald M.
Kaiser Aerospace and Electronics Corporation
Kleinberg Marvin H.
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