Microscope optical system and microscope objective lens

Details Microscope optical system and microscope objective lens Microscope optical system and microscope objective lens

2007-07-17

2007-07-17

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Compound lens system

Microscope

C359S380000, C359S381000

Reexamination Certificate

active

10721994

ABSTRACT:
A microscope optical system comprises an objective lens and an intermediate magnification varying part disposed just after the image side of the objective lens. A microscope objective lens according to another aspect of the invention comprises a first lens group and a second lens group in the mentioned order from the object side. The first lens group includes a positive meniscus lens with the concave surface facing the object side and one or more cemented lenses, the first lens group having a positive refractive power as a whole, at least one of the cemented lenses includes a lens made of a material having an Abbe's number equal to or larger than 80, and conditions 0.3≦wd/f≦0.45 and 0.6≦NA are satisfied, where f represents the focal length of the microscope objective lens as a whole, wd represents the working distance of the microscope objective lens, and NA represents the numerical aperture of the microscope objective lens.

REFERENCES:
patent: 5424803 (1995-06-01), Noguchi
patent: 6128128 (2000-10-01), Otaki et al.
patent: 6188514 (2001-02-01), Saito et al.
patent: 6320702 (2001-11-01), Yonezawa
patent: 2001/0040723 (2001-11-01), Kusaka
patent: 2003/0123145 (2003-07-01), Kaneko et al.
patent: 09-033818 (1997-02-01), None
patent: 2000-171721 (2000-06-01), None
patent: 2001-166215 (2001-06-01), None

Affiliated with

Also associated with

Rating

Microscope optical system and microscope objective lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microscope optical system and microscope objective lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microscope optical system and microscope objective lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3772497