Objectives

Details Objectives Objectives

1991-10-24

1993-03-02

Arnold, Bruce Y.

Optical: systems and elements

Lens

Microscope objective

359658, 359756, 359763, G02B 2102

Patent

active

051914735

ABSTRACT:
An objective of some 10 magnifications usable with microscopes, etc. which has an increased numerical aperture and working distance, including a first lens component that is a cemented lens consisting of negative and positive lens elements, a second lens component a third lens component, a fourth lens component consisting of a cemented lens and a fifth lens component having a positive refractive power, characterized by satisfying the following conditions:

REFERENCES:
patent: 3744881 (1973-07-01), Taira
patent: 3925910 (1975-12-01), Matsubara
patent: 4676606 (1987-06-01), Takahashi

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