Incident-light fluorescent illumination device and fluorescent microscope using the device

Abstract

An incident-light fluorescent illumination device includes: a light source emitting illumination light; a collector lens receiving the illumination light from the light source; a fly-eye lens optical system receiving the illumination light from the collector lens; an objective emitting the illumination light to a sample surface; and a relay optical system arranged between the fly-eye lens optical system and the objective. The fly-eye lens optical system includes a first fly-eye lens surface and a second fly-eye lens surface each having a plurality of lens elements. The incident-light fluorescent illumination device satisfies the conditional expression of 0.3≦D0/Lob≦0.75 where: D0 indicates the distance between a conjugate position with the second fly-eye lens surface through the relay optical system and a pupil position of the objective, and Lob indicates a parfocalizing distance of the objective.

Dependencies are inferred from the claim text.