摘要:
An image pickup system using an objective lens system for endoscopes consisting of an objective lens system comprising a front lens unit having negative refractive power and a rear lens unit having positive refractive power, and an optical system comprising an image sensor, and so adapted as to permit disposing the image sensor obliquely or parallel relatively to the optical axis by prolonging back focal length of said objective lens system and arranging an optical path deflecting system between said objective lens system and said image sensor.
摘要:
An endoscope apparatus for inspecting an object including an insertion section insertable into the object and having a distal end and a proximal end, an image guide arranged within the insertion section and having entrance and exit ends arranged at the distal and proximal ends of insertion section, respectively, an objective lens system arranged at the distal end of insertion section for forming an optical image of the object onto the entrance end of image guide, an eyepiece lens system arranged at the proximal end of insertion section for projecting the optical image transmitted through the image guide onto an observating position, a first piezo-electric bimorph arranged at the distal end of insertion section for vibrating the entrance end of image guide in a direction perpendicular to a longitudinal axis of the insertion section over a given distance, a second piezo-electric element arranged at the proximal end of insertion section for vibrating the exit end of image guide in the same direction and over the same distance as those of the entrance end of image guide, so that annoying black mesh and Moire fringe are removed.
摘要:
An optical system is disclosed for an endoscope having a generally tubular distal end in which an objective lens assembly and an image sensor in the form of a solid-state video camera are internally housed so that an image formed by the lens assembly is focussed upon the input or pickup surface of the video camera. The video camera is disposed along or in proximity to the center axis of the distal end of the endoscope and in some instances is oblique with respect to the center axis. The video camera may be positioned in this way due to the provision of a reflecting surface which is angularly disposed in opposing relationship with an input surface of the video camera, and deflection means disposed in front of the lens assembly and within the objective lens assembly, or between the lens assembly and the reflecting surface so that an image formed by the lens assembly can be focussed on the input surface of the video camera.
摘要:
An optical system is disclosed for an endoscope having a generally tubular distal end in which an objective lens assembly and a solid-state video camera are internally housed so that an image formed by the lens assembly is focussed upon the video camera. The video camera is disposed along or in proximity to the center axis of the distal end of the endoscope. The video camera may be positioned in this way due to the provision of a reflecting surface which is angularly disposed in opposing relationship with an input surface of the video camera, and deflection means disposed in front of the lens assembly and within the objective lens assembly, or between the lens assembly and the reflecting surface, so that an image formed by the lens assembly can be focussed on the input surface of the video camera.
摘要:
An objective lens system for an endoscope comprises a first lens component having a negative refracting power, a second lens component having a positive refracting power, a third lens component having a positive refracting power and a fourth lens component involving a meniscus lens having its concave surface facing the object side, with the lens system being such that the total length is short, the outside diameter is small, the angle of view is wide, and the illuminance in the peripheral portion of the image field is high.
摘要:
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.
摘要:
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.
摘要:
To provide a semiconductor device including a pair of antifuse elements at either a high level or a low level, an OR circuit that outputs different logic information for a case that at least one of the antifuse elements is at a high level and a case that both of the antifuse elements are at a low level, and an exclusive OR circuit that outputs different logic information for a case that the logic states are different from each other and a case that they are same as each other.
摘要:
A light reuse sheet includes a reflective surface having an uneven configuration, the reflective surface in order to reflect light in a specific direction so as to cause light to be incident to a solar battery cell, the light being incident to a solar battery module, or in order to exit light in a specific direction by reflecting the light, the light being emitted from a light emitting element of a light source module. The reflective surface satisfies the following formula where a length in a horizontal direction of a solar battery cell or a light emitting element is represented by Lx; a length in a vertical direction of a solar battery cell or a light emitting element is represented by Ly; an angle formed between a direction of an uneven configuration of the reflective surface and an edge in a horizontal direction of the solar battery cell or the light emitting element is represented by φ; and maximum width of light which passes between adjacent solar battery cells and which is reflected by a light reuse sheet and is incident to a light receiving face of a solar battery cell or maximum width of light which is not emitted from a light emitting element in a specific direction and which exits in a specific direction by reflecting the light at a light reuse sheet is represented by A. f φ = 0 = Ly · cos φ - Lx · sin φ - A ( cos 2 φ - sin 2 φ ) ( Formula 1 )
摘要:
There is provided a projector having a point light source disposed to an edge of an optical fiber for transmitting exciting light and including a fluorescent illuminant for emitting fluorescence by being exited by the exiting light, a light collecting optical system for collecting the fluorescence emitted from the point light source, a reflective display device for reflecting the fluorescence collected by the light collecting optical system and overlapping the fluorescence with an image signal, an outgoing aperture for stopping down the fluorescence overlapped with the image signal by the reflective display device, wherein the outgoing aperture and the point light source are disposed side by side in the vicinity of the front focusing surface of the light collecting optical system. With this arrangement, a bright projected image can be obtained while disposing the outgoing aperture and the point light source sufficiently near to each other, reducing aberration, and reducing the diameter of a collecting lens so that the overall size of the projector can be reduced.