G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 27/00 (2006.01) G02B 5/10 (2006.01) H05B 31/02 (2006.01)
Patent
CA 2546146
An apparatus directs electromagnetic energy, particularly for use in defence as a directed energy weapon, means of illumination for an active sensor and/or guidance system, countermeasure, or to ignite a fusion weapon; power transmission by means of a beam; propulsion by means of a beam or inertial fusion; power generation from inertial fusion; or telecommunications, from a source 3 comprising an area or volume as opposed to a point. Existing apparatus for directing electromagnetic energy from such a source in which all the optical surfaces are reflective and axially symmetric, known as an "eye mirror" , if small, limits the length of the plasma arc, or arcs, within. Figure 1 shows an eye mirror 74 comprising first, second and third stage defining mirrors 30, 32 and 34 respectively and first, second and third stage defined mirrors 31, 33 and 35 respectively. The first and second stage defined mirrors form a fixed defined unit 75. The source 3 extends outside the aperture described by the leading edge 147 of the first stage defining mirror 30. A pair of defining rays 5 and 6 respectively emanate from different points on or within said extended source 3 and meet at a point of intersection 7 on a further defined mirror 2. Each of said defining rays 5 and 6 is of a defining wavelength .lambda.. Said first defining ray is reflected from said further defined mirror 2 and intersects the fixed defined unit 75 at a respective further point 8 within the circular cone 91 defined by the angular input aperture at that point. Said second defining ray 6 is reflected from said further defined mirror 2 and intersects the fixed defined unit 75 at a respective further point 10 within the circular cone 92 defined by the angular input aperture at that point. There are two such defining rays for every point on the further defined mirror. The further defined mirror 43 2 lies outside the aperture described by the leading edge 147 of the first stage defining mirror 30 and is axially symmetric about the axis of symmetry 18.
Anderson John Ernest
Fetherstonhaugh & Co.
LandOfFree
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