| 摘要 |
New and improved non-radioactive coated lens for use in laser transmissions are created by vacuum deposition of specially prepared particles formed by melting 10-20% (w/w) barium fluoride and 90-80% (w/w) cerium fluoride in an inert atmosphere to form a mass which when cooled is comminuted into small particles for vacuum deposition upon a preselected lens substrate.
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