| 摘要 |
FIELD: optics. ^ SUBSTANCE: device has circular metallic plate, in which a periodic matrix of rectangular slits is cut. Plate is positioned in such a way, that a falling beam of millimeter-long waves falls at an angle of 45° relatively to plate surface. Polarization of falling beam is parallel to plate surface. When direction of plate is such, that electric field is perpendicular to slits (i.e. electric field is directed transversely to lesser dimension of slits), plate transfers almost 100% of falling power. If the plate rotates around its axis for 90° (while keeping angle between falling beam and plate equal to 45°) in such a way, that falling electric field is parallel to slits, then plate transfers 0% and reflects almost 100% of falling power at an angle of 90° relatively to falling beam. By changing rotation angle between 0° and 90° both reflected and passed power can be continuously varied between values 0% and 100% from falling power. Light divider has cooling device for taking heat, absorbed from magnetic waves, away from edge of metallic plate. ^ EFFECT: continuous variation of reflected and passed power. ^ 11 cl, 15 dwg |
