Illumination aperture diaphragm
AssigneeYamano Optical Co., Ltd.
InventorsShiro Yamano, Takayuki Sato
Life of this patent
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Abstract
An illumination aperture diaphragm 100A for a light source device for supplying illumination light in an endoscopic device to simultaneously observe a subject image formed by reflected illumination light in the visible light region and a fluorescence image from a fluorescent substance in a subject has a filter region 1 formed in a flat plate-like base material 3 and an aperture region 2 formed inside the filter region 1. The filter region 1 transmits light in the wavelength region of excitation light for allowing the subject to emit fluorescent light and reduces or blocks the transmission of the light in the visible light region that forms the subject image. An illumination aperture diaphragm 200A may include a plurality of diaphragm blade members 20A.
Claims14
An illumination aperture diaphragm in a light source device for supplying illumination light to a subject for use when a subject image formed by reflected illumination light in a visible light region and a fluorescence image from fluorescent substance in a subject are simultaneously observed,
- the illumination aperture diaphragm comprising an annular filter region formed on a base material and an aperture region formed inside the filter region, the filter region serving to transmit light in a wavelength region of excitation light for allowing the subject to emit fluorescent light and serving to reduce or block the transmission of light in a visible light region for forming the subject image.
An illumination aperture diaphragm to be used in a light source device when a subject image formed by reflected illumination light in a visible light region and a fluorescence image from a fluorescent substance in a subject are simultaneously observed,
- the illumination aperture diaphragm comprising a plurality of diaphragm blade members each having a surface partially or entirely formed with a filter portion, and having a filter region which is formed of the filter portions of the plurality of diaphragm blade members and an aperture region located inside the filter region, the filter region serving to transmit light in a wavelength region of excitation light for allowing the subject to emit fluorescent light and serving to reduce or block the transmission of light in a visible light region for forming the subject image.
Dependencies are inferred from the claim text.