Abstract Improved catoptric lens arrangements to form a beam from an extended source of wave propagated energy are shown. In the preferred embodiment a substantially cylindrical source, as an incandescent filament, is disposed so that its longitudinal axis is coincident with the axis of symmetry of at least one paraboloidal mirror, such axis being perpendicular to the principal axis of the parabola generating such mirror and being spatially separated from the focal point of such parabola. A light baffle is provided so that the rays from the source impinging on the at least one paraboloidal mirror are limited to those rays which cross the principal axis on one or the other side of the focal point of the generating parabola.
In a catoptric arrangement for forming from light radiated by a light source having a substantially cylindrical incandescent filament, a fan-shaped beam wherein substantially all aberrant rays are directed toward one of the broader sides of such beams, the improvement comprising: a. a first and a second opposing mirror, each one being concave and having a reflecting surface corresponding to the surface generated by rotating a segment of a different quadratic conic section about a line, such line passing between the adjacent focal points of the two quadratic conic sections; b. means for mounting a substantially cylindrical incandescent filament with its longitudinal axis collinear to the line; and c. baffle means disposed to intercept all rays from such filament which are initially directed to pass between the first and the second mirror without reflection.
Claim 2
Dependent Claim
134 words
In a catoptric arrangement for forming from light radiated by a light source having a substantially cylindrical incandescent filament, a fan-shaped beam wherein substantially all aberrant rays are directed toward one of the broader sides of such beams, the improvement comprising: a. a first and a second opposing mirror, each one being concave and having a reflecting surface corresponding to the surface generated by rotating a segment of a different quadratic conic section about a line, such line passing between the adjacent focal points of the two quadratic conic sections; b. means for mounting a substantially cylindrical incandescent filament with its longitudinal axis collinear to the line; and c. baffle means disposed to intercept all rays from such filament which are initially directed to pass between the first and the second mirror without reflection.
Claim 3
Dependent Claim
21 words
The improvement as in claim 1 wherein each segment of the different quadratic conic sections is a segment of a parabola.