| 摘要 |
PURPOSE:To decrease the deflection of mirrors and to enable the readjustment of their angle position by supporting the respective end regions of the mirrors at each one point by means of respective supporting plates and supporting the one place in the intermediate part of the mirrors with intermediate supporting members attached adjustably with position. CONSTITUTION:Mirrors 2, 3 are fitted respectively to supporting holes 7, 8 and 9, 10 punched in mirror supporting plates 4, 5 in both end regions thereof, and are supported by the projecting parts 14 provided in the supporting holes. The mirrors 2, 3 are supported by the supporting places 42, 42a in intermediate supporting members 30, 30a attached adjustably with position to a connecting member 6 connecting the plates 4, 5 at one point in the intermediate region of said mirrors. The mirrors are therefore positioned and supported on one plane determined by the three supporting points. The deflection by the own weight in the central region of the mirrors is decreased and the readjustment of the angular position of the mirrors is made possible by such constitution. |
