The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2005
Filed:
May. 31, 1996
Hidehiko Furuhashi, Fujisawa, JP;
Hidehiko Furuhashi, Fujisawa, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An illuminating apparatus for a microscope comprises a condenser lens for condensing beams of illumination light from a light source and a pin-hole stop. The pin-hole stop has a pin-hole, provided on an optical axis, for transmitting only strong light beams from a central portion of the light source among the illumination light beams condensed by the condenser lens. The pin-hole stop also has a light reducing/illumination area, disposed around the pin-hole in symmetry with respect to the optical axis, for illuminating the periphery of an on-specimen portion illuminated with the light beams passing through the pin-hole with a quantity of light exhibiting a predetermined ratio to a quantity of the light passing through the pin-hole. The same apparatus also comprises an objective lens for converging the illumination light beams passing through this pin-hole stop on a specimen. The pin-hole stop is located in a position substantially conjugate to a pupil plane of the objective lens.