Observing system, optical component and observation method

摘要

Provided is a system for observing an object that emits fluorescence when irradiated with excitation light. The system includes: a hole unit having holes on a plane perpendicular to an optical axis of the objective lens to allow the excitation light to pass through the holes in a direction parallel to the optical axis; and an imaging unit including: an imaging lens configured to focus the fluorescence; a microlens array having microlenses arranged on a plane perpendicular to an optical axis of the imaging lens; and an image sensor having pixels configured to: receive the fluorescence via the objective lens, at least one of the holes, and the microlens array, the fluorescence being emitted when the object is irradiated with the excitation light having passed through at least one of the holes and the objective lens; and output an image signal in accordance with an intensity of the received fluorescence.