An eyepiece structure for a surgical microscope includes an inner barrel, an intermediate barrel, and outer barrels. When the outer barrels are rotated, a protrusion of the inner barrel is guided along a spiral groove of the outer barrel and is moved back and forth along an optical axis. The protrusion is guided through a straight hole of the intermediate barrel that is not rotatable, and therefore, the inner barrel moves along the optical axis without rotating around the optical axis. An astigmatic lens is added to the inner barrel that is nonrotatable, to enable a surgeon suffering from astigmatism to conduct a surgical operation without glasses.

A binocular device for visualizing optical radiation comprises a support structure, a left camera, and a right camera coupled to the support structure. The left camera comprising left optics and a left image sensor, the right camera comprising right optics and a right image sensor, the left image sensor and the right image sensor being configured to create left and right video signals from detected optical radiation received from the corresponding left and right input optics about a same field of view along respective left and right input optical axes. A specular reflection is detected.

A binocular device for visualizing optical radiation comprises a support structure, a left camera, and a right camera coupled to the support structure. The left camera comprising left optics and a left image sensor, the right camera comprising right optics and a right image sensor, the left image sensor and the right image sensor being configured to create left and right video signals from detected optical radiation received from the corresponding left and right input optics about a same field of view along respective left and right input optical axes. A specular reflection is detected.

A customized viewing system for an optical device to alleviate back and neck strain.

A light source device includes a light source unit with at least one set of light sources, wherein each of the at least one set of light sources emits a light of a predetermined wavelength band; an optical waveguide unit that multiplexes light from the at least one set of light sources; and an incident unit, wherein on an incident surface of the incident unit, with an optical axis on the incident unit as a reference position, an installation state of each light source is adjusted such that the maximum separation distances are set equal to each other from the reference position to a maximum incident angle of an incident position of the respective light from the at least one set of light sources incident on the incident unit.

A surgical retractor includes a plurality of cameras integrated therein. One such retractor includes a tubular retractor and an insert supporting said plurality of cameras can be disposed within a tubular retractor.

A surgical retractor includes a plurality of cameras integrated therein. One such retractor includes a tubular retractor and an insert supporting said plurality of cameras can be disposed within a tubular retractor.

A device for protecting a dental professional from patient aerosol and splatter is provided. The device includes a first elastic section with two holes connected to a second rigid section. The first section is sufficiently elastic to allow for increasing or decreasing the inter optic distance of a binocular operating microscope without affecting the seal or material integrity of the first section or the position or function of the second section.

The light emitting device includes an excitation light source, and a light emitting light source, wherein the light emitting light source includes a substrate, a photonic crystal structure which is provided to the substrate and has a light emitting layer, and an electrode configured to inject an electrical current into the light emitting layer, the excitation light source irradiates the light emitting layer with excitation light, the light emitting layer generates light due to the electrical current injected from the electrode and the excitation light, and in the photonic crystal structure, the light emitted in the light emitting layer resonates in an in-plane direction of the substrate, and a laser beam is emitted in a normal direction of the substrate.

An observation device includes: first objective lenses arranged in a row so as to be parallel to one another; second objective lenses arranged in a row so as to be parallel to one another; and image capturing elements for capturing first images formed by the first objective lenses and second images formed by the second objective lenses, respectively, wherein each of the objective lenses is a magnifying objective lens, a first axis of light incident on the first objective lenses and a second axis of light incident on the second objective lenses are parallel to one another, fields of view of the first objective lenses and fields of view of the second objective lenses are arranged alternately in a row on an observation line, and the first images and the second images are arranged in a row in image-forming regions that are disposed at positions different from each other.