Patent ID: 9717416
Date: 2017-08-01
CPC Classifications: A61B

Claim:
1. An optical zoom probe comprising: an aperture adjuster that comprises a first fluid that blocks light incident on the aperture adjuster, a second fluid that passes light incident on the aperture adjuster, and an aperture in which the second fluid is filled and about which the first fluid is disposed, the aperture adjuster being configured to adjust a size of the aperture by applying an electric field to change a location of a boundary between the first fluid and the second fluid; a focus adjuster that comprises at least one liquid lens configured to focus the light passed through the aperture and adjust a focal length to have an ultra-close distance and a close distance, the ultra-close distance being 2 mm or less as measured between a target object and a lens of the optical zoom probe that is placed closest to the target object, the close distance being 2 mm to 30 mm as measured between the target object and the closest lens; and a filter which comprises a center region in which incident light passes without change, and a filter region disposed about the center region and increases a depth of focus (DOF) of light which is focused on a location that has the ultra-close distance, wherein the aperture adjuster is further configured to increase a size of a light beam incident on the focus adjuster when the focal length has the ultra-close distance, and to decease the size of the light beam when the focal length has the close distance.