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单词
petzval lens
释义
Petzval lens
Petzval lens
[
′pets·väl ‚lenz
]
(optics)
A photographic objective which consists of four lenses ordered in two pairs widely separated from each other, with the first pair cemented together and the second usually having a small air space.
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更新时间:2025/3/4 2:20:00