ILLUMINATION OPTICAL SYSTEM FOR MICROSCOPE

Japanese Patent JP3864105

B2

PROBLEM TO BE SOLVED: To provide an illumination optical system for a microscope which is capable of forming a light source image having the size and irradiation angle adequate for a pupil position of an objective lens and to provide an illumination optical system for a microscope which is capable of making zonal illumination possible without drastically lowering illumination efficiency.
SOLUTION: The illumination optical system for the microscope is arranged with a light source, a collector lens for converting the divergent luminous flux from the light source to approximately parallel luminous fluxes, an intermediate image formation lens 3 for forming a light source image, a projection lens for again forming the image of the luminous flux diverging after forming the light source image through the lens 3 and projecting the light source image to the pupil position of the objective lens, and an annular opening arranged in a position conjugate with the light source. The lens 3 consists of the set of a plurality of sectorial lens surfaces 3c lined up in such a manner that the apex angles thereof attain 360° in total in the rotating direction around one point P. The optical axes O of the respective lens surfaces 3a exist near their vertex angles and are lined up on the circumference around the one point P.

Kazuhiro Hayashi

JP2002076725A

December 27, 2006

March 19, 2002

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Olympus Endo Technology America Inc.

G02B21/06; (IPC1-7): G02B21/06

JP2001358071A
JP9219358A
JP4310911A
JP58185819U
JP26000456B1
JP44010837B1
JP58016214A

Yasushi Shinohara
Masayuki Fujinaka

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