Objective lens system for microscopes

Details Objective lens system for microscopes Objective lens system for microscopes

1990-11-27

1991-12-31

Arnold, Bruce Y.

Optical: systems and elements

Lens

Microscope objective

G02B 2102

Patent

active

050766767

ABSTRACT:
An objective lens system for microscopes comprising, in the order from the object side, a first lens unit which has a positive refractive power, comprises a positive meniscus lens component having a convex surface on the image side and allows a diverging light bundle to emerge therefrom, a second lens unit which has a positive refractive power, comprises at least one cemented surface having a negative refractive power and is movable along the optical axis, and a third lens unit having a negative refractive power, and adapted so as to favorably correct aberrations by moving the second lens unit in conjunction with thickness of a transparent plane parallel plate arranged between the first lens unit and an object to be observed through the objective lens system. This objective lens system has a high magnification, a large NA and a long working distance.

REFERENCES:
patent: 4588264 (1986-05-01), Shimizu

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