Patent application number | Description | Published |
20080208005 | Adaptor optical system for endoscopes and endoscope - An optical system which can be detached and attached is constituted such that it is arranged at the object side of an objective optical system for endoscope in which an incidence pupil is arranged, and a middle image of the objective is formed at its inside, and in the arrangement state, the incidence pupil of the objective optical system for endoscope is relayed at a predetermined position which is more projected toward the utmost object side than a surface at the object side in the endoscope. (An incidence pupil which is conjugate with an incidence pupil is arranged at a position which is more projected toward the object side by a predetermined amount than a surface which is at the utmost object side in the endoscope). | 08-28-2008 |
20080252970 | Stereoscopic display unit and stereoscopic vision observation device - A stereoscopic display unit and stereoscopic vison observation device are disclosed that include a projector that projects left-eye and right-eye images via two apertures that serve as exit pupils of the projector onto the same image surface and a display panel. The display panel is positioned at, or in the vicinity of, the image surface, and includes an optical element having an optical axis and positive optical power that conjugates the exit pupils of the projector so as to form exit pupils for observation. The optical axis of the optical element having positive optical power is offset so as to lie outside the surface area of the display panel and a diffuser is provided at, or in the vicinity of, the image surface for the purpose of enlarging the exit pupils for observation to thereby form enlarged exit pupils for observation. Various other features are also disclosed. | 10-16-2008 |
20080269563 | Illumination light application structure and endoscope provided with the same - An illumination light application structure provided for irradiating an observation object with illumination light in an observation optical apparatus provided with an objective optical system inside a lens barrel whose top is configured into a slender shape, includes a wavelength converting element located in the proximity of a position of an entrance pupil of the objective optical system; a light source emitting light whose wavelength is converted by the wavelength converting element; and an irradiation device irradiating the wavelength converting element with the light emitted from the light source through the objective optical system. | 10-30-2008 |
20080283770 | Illumination light detecting optical system and optical apparatus and endoscope apparatus provided with the same - An illumination light detecting optical system that is used for an optical apparatus comprises a light emitting element which emits excitation light; an insertion part of a long-narrow-shape; a fluorescence luminescence component arranged near a top of the insertion part; an excitation light guiding means which leads the excitation light emitted from the light emitting element to the fluorescence luminescence component; and a light detecting means which detects return light which is a part of the illumination light. It is provided with a pillar-shaped transparent component for irradiating illumination light arranged coaxially at a forward position of the fluorescence luminescence component; an illuminating-light-extracting-means for extracting the illumination light which enters at an angle smaller than a total reflection angle to the side surface of the pillar-shaped transparent component from the pillar-shaped transparent component, out of the illumination light which is emanated in forward direction from the fluorescence luminescence component and enters into the inside of the pillar-shaped transparent component; and a deflecting means by which the extracted illumination light is directed toward the light detecting means. | 11-20-2008 |
20090051764 | ENDOSCOPE SYSTEM AND LENS UNIT - An endoscope system has a light source apparatus and an endoscope including an illumination optical system and an objective optical system. At least the objective optical system of the endoscope is provided with an adjustable diaphragm, and in a light path in one of the light source apparatus, the illumination optical system, and the objective optical system, an insertable/retractable filter for observation for special light is provided. The adjustable diaphragm performs a closing operation or an opening operation only when the filter for observation for special light is inserted into the light path. | 02-26-2009 |
20090091769 | Inner surface measuring apparatus - The inner surface shape of a hole, in particular, the inner surface shape of a hole the entry of which is narrow and which becomes wider further in from the entry, can be measured at a high level of accuracy. An inner surface measuring apparatus is provided which comprises: a low coherent light source that outputs low coherent light in to two; a low coherent light dividing section that divides one portion of the low coherent light; a light path length adjusting section that adjusts a light path length of one of the low coherent lights divided by the low coherent light dividing section; a straight rod shaped probe that irradiates the other of the low coherent lights divided by the low coherent light dividing section from a front end section onto a measurement object arranged in a direction intersecting with the lengthwise direction of the probe; a low coherent light multiplexing section that multiplexes a low coherent light that returns having been reflected on the measurement object with the one low coherent light whose light path length has been adjusted by the light path length adjusting section; a light detector that detects the multiplexed low coherent light; and a rotation mechanism that relatively rotates the probe and the measurement object about an axis along the lengthwise direction of the probe. | 04-09-2009 |
20090231983 | IMAGE PICKUP APPARATUS FOR CAPTURING SPECTRAL IMAGES OF AN OBJECT AND OBSERVATION SYSTEM INCLUDING THE SAME - An image pickup apparatus has a construction in which a diffraction element is provided in an observation optical system. Zero-order light that is transmitted straight through the diffraction element and one of the +1st-order diffracted light and the −1st-order diffracted light that is diffracted by the diffraction element are imaged onto an image pickup surface of an image pickup apparatus. The imaging areas of the zero-order light and one of the +1st-order diffracted light and the −1st-order diffracted light that is diffracted by the diffraction element do not overlap on the image pickup surface of the image pickup apparatus. With this construction, a small image pickup apparatus that provides a high-resolution spectral image and a color image of an object can be obtained. | 09-17-2009 |
20100195007 | OPTICAL SYSTEM - The present optical system comprises a forward observation optical system, an entire lateral circumference-observation optical system, a variable stop arranged on the image side of the observation optical system, an image-forming optical system, and an image pickup element, and the variable stop is formed so as to be capable of switching an observation field of view at least to a first observation field of view including only a forward field of view and to a second observation field of view including a forward field of view with a narrower angle than that of the first observation field of view and a field of view of the entire lateral circumference. The observation optical system is arranged on the object side of the opening in the central position of the observation optical system. The variable stop intercepts an optical path for the observation optical system when an observation field of view is switched to the first observation field of view, and opens the optical path for the observation optical system when an observation field of view is switched to the second observation field of view. | 08-05-2010 |
20100208046 | Stereoscopic optical system, and optical apparatus for stereoscopic measurement, stereoscopic measurement apparatus and stereoscopic observation apparatus each using the same - A stereoscopic optical system includes, at a distal end of an insertion part of an endoscope, a two-path forming optical system for forming two paths of rays involving a parallax, an image forming optical system for forming images out of light travelling along the respective paths of rays in the two-path forming optical system onto a common region, and an image sensor arranged at an image forming position of the image forming optical system. The stereoscopic optical system is further provided with a time-division path switching means that is capable of switching between the two paths of rays in a time-division manner so that only light coming from either one of the two paths of rays formed by the two-path forming optical system enters the image forming optical system. | 08-19-2010 |
20130100274 | ENDOSCOPE APPARATUS - Provided is an endoscope apparatus including an illumination unit and an image acquisition unit, wherein the illumination unit has a light emission unit at which a light source is installed, and a mask configured to shield some of the light emitted from the light emission unit, and when an irradiation angle of the light measured when an optical axis of the light emission unit is set to 0° is set to θ, a function of the irradiation angle θ representing angular distribution of the light emitted from the light emission unit is set to f(θ), and a maximum angle defined to be vignetted by the mask when the optical axis of the light emission unit is set to 0° is set to θ | 04-25-2013 |