Prototype beam splitter for the Advanced Laser Interferometer Gravitational Wave Observatory (aLIGO)
2008 (prototype)
2008 (prototype)
1829
1829
1845
199-500
1977
1973
1790
1820
1775-1800
1801-1900
1808-1825
1737-1738
1831
1767-1786
1900-1912
1900-1912
1790
1860-1880
1801-1900
1800-1834
1805-1846
1775-1785
1750
1810
1720
hallmarked 1784
1790
1920
1930-1935
1930-1935
1967
1992-1995
1822-1823
1822-1823
1822-1823
1700-1750
1822-1823
1991
1915-1922