Imaging apparatus for endoscopes
AssigneeOlympus Corporation
InventorTakeshi Suga
Life of this patent
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Abstract
An imaging apparatus for endoscopes has an objective optical system forming an image of an object and a holding frame retaining the objective optical system. The objective optical system is provided with optical filters which reduce a transmittance in a particular wavelength region of illumination light irradiating the object to 0.1% or less and has a light passage preventing device blocking light passing through a clearance between the outside surfaces of the optical filters and the inside surface of the holding frame retaining the optical filters.
Claims16
An imaging apparatus for endoscopes, comprising:
- an objective optical system forming an image of an object;
- and
- a holding frame retaining the objective optical system,
- wherein the objective optical system is provided with optical filters which reduce a transmittance in a particular wavelength region of illumination light irradiating the object to 0.1% or less and has light passage preventing means of blocking light passing through a clearance between outside surfaces of the optical filters and an inside surface of the holding frame retaining the optical filters.
An imaging apparatus for endoscopes, comprising:
- an objective optical system forming an image of an object;
- and
- a holding frame retaining the objective optical system,
- wherein the objective optical system is provided with an optical filter which reduces a transmittance of excitation light inducing fluorescent light from the object to 0.1% or less and has light passage preventing means of blocking light passing through a clearance between an outside surface of the optical filter and an inside surface of the holding frame retaining the optical filter.
Dependencies are inferred from the claim text.