Abstract: This electromagnetic wave concentrator having high rigidity and flexibility is suitable for communications and is produced by molding using stress relaxation in thin-film material. An ultra-lightweight electromagnetic wave concentrator is obtained by increasing the rigidity by forming a thin-film curved body of an electromagnetic wave reflective surface having a paraboloid shape. Reinforcing grooves in the reflective surface increase rigidity. To form the reflective surface shape and the reinforcing grooves, pressure is applied to the thin-film material with a molding die, or the thin-film material is attached to the molding die by pressure while heating the thin-film material with a heating device, such as a thermostatic chamber.

Abstract: The electromagnetic wave focusing device has a mirror group consisting of a focal-line type primary reflective mirror and secondary reflective mirror which have a unique parabolic cross-sectional shape. Incident light rays are primarily reflected by the primary reflective mirror and are then secondarily reflected by the secondary reflective mirror, so that solar rays are focused at one point. The electromagnetic wave focusing device can be made extremely thin and light-weight, and can be folded without causing great loss of precision or great increase in mass. Consequently, the mirror bodies can be folded into a compact form and loaded inside the restricted space of a rocket or the like; thus, the device can be transported into aerospace, and a sunlight focusing device having high focusing performance can be reproduced on-site with a high precision.

Abstract: The present invention provides an ultra-lightweight and highly precise electromagnetic wave concentrator having a high rigidity and also flexibility, which is suitable as a solar ray concentrate device and for communications, this concentrator being produced by a molding process using the effect of stress relaxation in a thin-film material. An ultra-lightweight electromagnetic wave concentrator 10 having a high rigidity and also flexibility is obtained by conducting processing that increases the rigidity by forming a thin-film curved body comprising an electromagnetic wave reflective surface 11 that has the surface shape that is part of a paraboloid of revolution or of a curved surface modeling same by the effect of stress relaxation in a thin-film material, and also forming a structure of reinforcing grooves 13-15 in the reflective surface 11 for increasing the regidity.

Abstract: The electromagnetic wave focusing device of the present invention comprises a mirror group consisting of a focal-line type primary reflective mirror 11 and secondary reflective mirror 12 which have a unique parabolic cross-sectional shape in an arbitrary cross section that is perpendicular to a certain direction. Incident light rays 14 are primarily reflected by the abovementioned primary reflective mirror 11, and are then secondarily reflected by the secondary reflective mirror 12, so that solar rays are focused at one point. Since focal-line type parabolic cylindrical reflective mirrors are used, the reflective mirrors can be constructed from mirror films and frame assemblies having a specified shape. Accordingly, the electromagnetic wave focusing device can be made extremely thin and light-weight, and this electromagnetic wave focusing device can be folded up without causing any great loss of precision or great increase in mass.