The micrography of metals in ultra-violet light
1937 ◽
Vol 158
(895)
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pp. 671-681
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Keyword(s):
The resolution of metallic structures under the microscope has, during many years, been limited to that given by oil immersion apochromatic objectives of N. A. 1·30 or 1·40. With such objectives fine lamellar structure of the order of 140,000 lines per inch can be resolved. In October, 1933,* one of the authors published micrographs taken with a new monochromatic objective! for metallurgy designed to work in a narrow band of the visual deep blue at a wave-length of approximately 4395 A., and having the large numerical aperture of 1·60. With this objective lamellar structure measuring 180,000 lines per inch has been resolved.
1922 ◽
Vol 93
(651)
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pp. 235-248
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Keyword(s):
1929 ◽
Vol 13
(2)
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pp. 249-260
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1914 ◽
Vol 91
(623)
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pp. 23-29
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Keyword(s):
1926 ◽
Vol 45
(1)
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pp. 34-41
Keyword(s):
1954 ◽
Vol 45
(1)
◽
pp. 67-78
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Keyword(s):
1951 ◽
Vol 207
(1091)
◽
pp. 527-539
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Keyword(s):
1939 ◽
Vol 172
(950)
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pp. 299-314
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Keyword(s):
1925 ◽
Vol 44
◽
pp. 8-13
Keyword(s):