| 摘要 |
PCT No. PCT/DE79/00070 Sec. 371 Date Mar. 7, 1980 Sec. 102(e) Date Mar. 6, 1980 PCT Filed Jul. 6, 1979 PCT Pub. No. WO80/00194 PCT Pub. Date Feb. 7, 1980. Reflex devices, preferably on cinematographic and photographic cameras with rotating, oscillating or displaceable retracting mirrors are easier to balance the lighter the dynamically operated reflecting mirror is in weight. The weight reduction is achieved by using pure carbon, preferably in the form of glass-like carbon, for the mirror carrier material. The pores in the micro range exposed at the polished surface during the precision treatment are eliminated by an additional vacuum treatment in the production of the three-dimensionally cross-linked plastics intermediate product. |
