Optical system mounted on a confocal endomicroscope

An optical system mounted on a confocal endomicroscope for outputting a first beam of a first wavelength via a first laser and a second beam of a second wavelength via a second laser, irradiating an object with the first and second beams simultaneously, acquiring emission light emitted from the object, and processing the acquired emission light, the optical system comprising:

• the first laser coupled to a first optical fiber and the second laser coupled to a second optical fiber;
• an optical fiber coupler configured to combine the first optical fiber and the second optical fiber into a third optical fiber such that the first beam propagating through the first optical fiber and the second beam propagating through the second optical fiber are propagated simultaneously through the third optical fiber;
• and
• an optical propagation module through which the first beam and the second beam output from the optical fiber coupler propagate,
• wherein the optical propagation module comprises:
• an optical path through which the first beam, the second beam, and the emission light propagate;
• a plurality of optical members;
• a first collimator coupled to the third optical fiber;
• and
• a second collimator, coupled to a fourth optical fiber and connected to a probe for irradiating the object with the first and second beams,
• wherein the second collimator is configured to condense the first and second beams, corresponding to parallel light propagating along the optical path, to be transmitted through the fourth optical fiber,
• wherein no optical element other than the fourth optical fiber is disposed between the second collimator and said probe, and
• wherein the first and second beams are configured to be transmitted through the fourth optical fiber to the probe.