Microscope objective lens and microscope

Details Microscope objective lens and microscope Microscope objective lens and microscope

1996-07-22

1998-08-25

Nguyen, Thong

Optical: systems and elements

Lens

Microscope objective

359368, 359656, G02B 2102, G02B 2100

Patent

active

057988706

ABSTRACT:
A microscope objective lens is provided as a semi-apochromatic microscope objective lens whose magnification is about 20, in which the image surface is flat from the center to the periphery with favorably corrected various kinds of aberration, and which can also be used for observing fluorescence under downward radiation. The microscope objective lens comprises, successively from the object side, a negative meniscus lens component L1 having a concave surface directed onto the object side, a positive meniscus lens component L2 having a concave surface directed onto the object side, a cemented positive lens component L3, a cemented positive lens component L4, and a negative meniscus cemented lens component L5 having a concave surface directed onto the image side, wherein the following conditions:

REFERENCES:
patent: 3879111 (1975-04-01), Goto
patent: 4184747 (1980-01-01), Uetake
patent: 4208099 (1980-06-01), Tojyo
patent: 4501474 (1985-02-01), Kimura
patent: 4756611 (1988-07-01), Yonekubo et al.
patent: 5132845 (1992-07-01), Suzuki

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