| 摘要 |
<p>An extreme wide angle, very large aperture, very compact, solar blind, UV imaging lens system. The lens system (100, 200, 300, 400) has a fused silica polyvinyl alcohol glass color filter (10, 20, 28, 30), a lens made of fused silica (40), a lens made of nickel sulfate (50), a layer of coupling fluid (52) and another lens made of fused silica (60). Alternatively, sapphire (140) can be used after the color filter instead of the fused silica (40). An alternative lens is composed of two layers of fused silica (210, 220), a layer of nickel sulfate (240), another layer of fused silica (250), coupling fluid followed by polyvinyl alcohol (252), a color glass filter (260) and coupling fluid followed by fused silica (270). In a fourth embodiment, the lwo layers of fused silica (310, 370) are followed by polyvinyl alcohol (328), a layer of colored glass filter (330), fused silica (340), nickel sulfate (350), coupling fluid (352), and fused silica (360).</p> |
