Optical: systems and elements – Lens – Microscope objective
Reexamination Certificate
2011-01-11
2011-01-11
Nguyen, Thong (Department: 2872)
Optical: systems and elements
Lens
Microscope objective
C359S656000, C359S368000
Reexamination Certificate
active
07869132
ABSTRACT:
An immersion microscope objective formed of thirteen or fewer lens elements includes, in order from the object side, first and second lens groups of positive refractive power, a third lens group, a fourth lens group having negative refractive power with its image-side surface being concave, and a fifth lens group having positive refractive power with its object-side surface being concave. The first lens group includes, in order from the object side, a lens component that consists of a lens element of positive refractive power (when computed as being in air) and a meniscus lens element having its concave surface on the object side. Various conditions are satisfied to ensure that images of fluorescence, obtained when the immersion microscope objective is used in a laser scanning microscope that employs multiphoton excitation to observe a specimen, are bright and of high resolution. Various laser scanning microscopes are also disclosed.
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English translation of pp. 80-82 of “Introduction to Optics”, first edition, eighth printing, published in Japanese by The Optronics Co., Ltd. on Mar. 29, 2002.
English translation of pp. (171)41-(175)45 of Eiji Yokoi et al., “Industrial Info.—A new water immersion objective lens specifically designed for two-photon imaging”, published in SAIBOU (The CELL) by New Science Co., Ltd. on Apr. 20, 2008.
Kusaka Kenichi
Saito Masayoshi
Yokoi Eiji
Arnold Bruce Y.
Arnold International
Nguyen Thong
Olympus Corporation
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