DISPERSING DEVICE Russian patent published in 1998 - IPC

FIELD: optical instrumentation engineering. SUBSTANCE: device has four concave mirrors with similar radius of curvature and two spectral prisms. Fourth mirror is positioned at double focal distance from first mirror, and third mirror is located at double focal distance from second mirror. Optical length of path from first to second mirrors is equal to optical length of path from third to fourth mirrors. First prism is installed on way of optical ray between first and second mirrors, and second prism, between third and fourth mirrors. Prisms are facing one another either with non-operating edges or ribs formed by intersection of operating edges. In addition, device is provided with mechanisms which ensure synchronous turning of prisms through the same angles in opposite directions. EFFECT: improved design. 3 cl, 2 dwg