Epi-illumination apparatus
AssigneeNikon Corporation
InventorToshiaki Nihoshi
Life of this patent
Estimating the term…
Abstract
An epi-illumination apparatus has, in the following order from an light source device side, a first imaging lens which forms an image of the light source and a field lens which projects the image of the light source to an object to be illuminated. Either one of a first magnification varying unit or a second magnification varying unit is selectively disposed between the first imaging lens and the field lens in order to vary a magnification of the image of the light source. The first magnification varying unit has a first aperture stop and a second imaging lens that is disposed in the field lens side of the first aperture stop, while the second magnification varying unit has a second aperture stop and a third imaging lens that is disposed in the first imaging lens side of the second aperture stop.
Claims11
An epi-illumination apparatus comprising, in the following order from an light source device side:
- a first imaging lens which forms an image of the light source;
- and
- a field lens which projects said image of the light source toward an object to be illuminated;
- wherein, either one of a first magnification varying unit or a second magnification varying unit is selectively disposed between said first imaging lens and said field lens in order to vary a magnification of said image of the light source, said first magnification varying unit including a first aperture stop and a second imaging lens that is disposed in the field lens side of the first aperture stop, and said second magnification varying unit including a second aperture stop and a third imaging lens that is disposed in the first imaging lens side of the second aperture stop.
An epi-illumination apparatus comprising:
- a light source;
- a collector lens that condenses a light flux emitted from said light source so as to change it into a parallel ray;
- an imaging lens that condenses said parallel ray so as to form an image of said light source;
- a field lens that projects said image of the light source toward an object to be illuminated;
- and
- an aperture stop disposed between said imaging lens and said field lens and at a position optically conjugate to a pupil position of an objective lens of a microscope;
- wherein a magnification of said light source is varied by inserting/withdrawing a magnification varying optical system in/from a front or back side of said aperture stop.
An epi-illumination apparatus comprising:
- a plurality of light source devices to be selectively used;
- a first imaging lens that forms an image of a light source of one light source device selected from said plurality of light source devices;
- a field lens that projects said image of the light source toward an object to be illuminated;
- and
- a plurality of magnification varying units that is to be selected in accordance with said selected light device so as to be disposed between said first imaging lens and said field lens to determine a magnification of said image of the light source matched with said selected light source device, each of said magnification varying units comprising an aperture stop and a second imaging lens.
An epi-illumination apparatus comprising:
- a plurality of light source devices to be selectively used;
- a first imaging lens that forms an image of a light source of one light source device selected from said plurality of light source devices;
- a field lens that projects said image of the light source toward an object to be illuminated;
- an aperture stop disposed between said first imaging lens and said field lens and at a position that is optically conjugate to a pupil position of an objective lens of a microscope for which said epi-illumination apparatus is used;
- and
- a plurality of magnification varying units that is to be selected in accordance with said selected light device so as to be disposed in the front or back side of said aperture stop between said first imaging lens and said field lens to determine a magnification of said image of the light source matched with said selected light source device, each of said plurality of magnification varying units comprising a second imaging lens having the same focal length.
Dependencies are inferred from the claim text.