Immersion objective lens system for microscope

Details Immersion objective lens system for microscope Immersion objective lens system for microscope

2007-04-03

2007-04-03

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

Microscope objective

Reexamination Certificate

active

11330349

ABSTRACT:
An apochromat immersion objective lens system for microscope which consists, in order from the object side, of a first lens unit composed of a cemented lens component consisting of a plano-convex lens element having a planar surface on the object side and a meniscus lens element having a concave surface on the object side, a second lens unit composed of a lens component or two lens components, a third lens unit comprising at least two cemented lens components, a fourth lens unit composed of a negative lens component having a strongly concave surface on the image side and a fifth lens unit comprising a meniscus lens component having a concave surface on the object side, and has a large numerical aperture exceeding 1.4 without using special oil or a special cover glass plate as well as favorably corrected spherical aberration and chromatic aberration.

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patent: 2004-522185 (2004-07-01), None

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