Patent
1988-12-09
1990-08-07
Henry, Jon W.
350254, 350414, 350453, G02B 2102, G02B 1502, G02B 406
Patent
active
049462652
ABSTRACT:
A microscope whose enlargement magnification is changeable includes a plurality of interchangeable first objective lenses of different focal lengths for changing a divergent light flux from an object on a stage into a parallel light flux, a first interchanging device for moving the first objective lenses and interchangeably installing them on a predetermined optic axis, a plurality of interchangeable second objective lenses of different focal lengths for condensing the parallel light flux from the first objective lenses and forming an enlarged image of the object at a predetermined position, an eyepiece for observing therethrough the enlarged image of the object formed by the second objective lenses, a prism for directing the light flux from the second objective lenses to the eyepiece, and a second interchanging device provided between the first interchanging device and the prism for moving the second objective lenses and interchangeably installing them on the predetermined optic axis.
REFERENCES:
patent: 2133509 (1938-10-01), Hall et al.
patent: 4365871 (1982-12-01), Muchel
patent: 4715697 (1987-12-01), John et al.
patent: 4717246 (1988-01-01), Fehr et al.
Ohyama Reiko
Shimizu Yoshiyuki
Henry Jon W.
Nikon Corporation
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