Abstract: An optical system for use with a stereo video endoscope with a fixed lateral viewing direction. The optical system including: a laterally-viewing distal optical assembly; and a proximal optical assembly, the distal optical assembly and proximal optical assembly jointly establishing a beam path, the proximal optical assembly including: a left channel lens system; and a right channel lens system similarly configured to the left channel lens system; wherein the distal optical assembly establishes an optical axis and is configured to couple incident light along the beam path from an object space into the left channel lens system and into the right channel lens system of the proximal optical assembly; and the optical system comprises an angle-selective optical element with a surface oriented perpendicular to the optical axis of the distal optical assembly, the surface being located in the beam path and coated with an incidence-angle-selective dielectric coating.

Abstract: An optical system for a stereo video endoscope including: first and second lens system channels each having optical elements in identical configurations, the optical elements being arranged in a same position along first and second optical axes, respectively, an optical axis of first and second optical elements coincide with the first and second optical axes, respectively, first and second cross-sectional areas of the first and second optical elements are inscribed in first and second circumferential circles, respectively, centers of first and second circumferential circles each coincide with the first and second optical axes, respectively, to define a maximum radius of the first optical element and the second optical element, the first and second circumferential circles overlap one another, and circumferential shapes of the first and second optical elements deviate from the first and second circumferential circles circumscribing them such that the first and second optical elements do not contact.

Abstract: An optical system for use with a stereo video endoscope with a fixed, lateral viewing direction, including: laterally-viewing distal and proximal optical assemblies, similarly configured left and right lens system channels; the distal optical assembly couples incident light from an object space into the left and right lens system channels; the distal optical assembly includes an entrance lens, a deflection prism group and an exit lens in a direction of incident light; the deflection prism group includes first and second prisms in the direction of incident light; the first prism includes first entrance and first exit sides at an angle relative thereto; the second prism includes a second entrance side, a reflection side and a second exit side; and the first entrance side of the first prism and the reflection side of the second prism enclose an angle that is greater than a total reflection angle of the second prism.

Abstract: An optical system for a stereo video endoscope including: first and second lens system channels each having optical elements in identical configurations, the optical elements being arranged in a same position along first and second optical axes, respectively, an optical axis of first and second optical elements coincide with the first and second optical axes, respectively, first and second cross-sectional areas of the first and second optical elements are inscribed in first and second circumferential circles, respectively, centers of first and second circumferential circles each coincide with the first and second optical axes, respectively, to define a maximum radius of the first optical element and the second optical element, the first and second circumferential circles overlap one another, and circumferential shapes of the first and second optical elements deviate from the first and second circumferential circles circumscribing them such that the first and second optical elements do not contact.

Abstract: An endoscopic optical system including: a fiber image conductor arranged in an elongated shaft tube, the fiber image conductor having a proximal face; an objective arranged distally relative to the fiber image conductor; an observation device arranged proximally relative to the proximal face of the fiber image conductor; a mask; and a transparent cover pane arranged between the proximal face of the fiber image conductor and the observation device; wherein the transparent cover pane is configured as a moire filter.

Abstract: An optical system for use with a stereo video endoscope with a fixed lateral viewing direction. The optical system including: a laterally-viewing distal optical assembly; and a proximal optical assembly, the distal optical assembly and proximal optical assembly jointly establishing a beam path, the proximal optical assembly including: a left channel lens system; and a right channel lens system similarly configured to the left channel lens system; wherein the distal optical assembly establishes an optical axis and is configured to couple incident light along the beam path from an object space into the left channel lens system and into the right channel lens system of the proximal optical assembly; and the optical system comprises an angle-selective optical element with a surface oriented perpendicular to the optical axis of the distal optical assembly, the surface being located in the beam path and coated with an incidence-angle-selective dielectric coating.

Abstract: An optical system for use with a stereo video endoscope with a fixed, lateral viewing direction, including: laterally-viewing distal and proximal optical assemblies, similarly configured left and right lens system channels; the distal optical assembly couples incident light from an object space into the left and right lens system channels; the distal optical assembly includes an entrance lens, a deflection prism group and an exit lens in a direction of incident light; the deflection prism group includes first and second prisms in the direction of incident light; the first prism includes first entrance and first exit sides at an angle relative thereto; the second prism includes a second entrance side, a reflection side and a second exit side; and the first entrance side of the first prism and the reflection side of the second prism enclose an angle that is greater than a total reflection angle of the second prism.

Abstract: An endoscope having an adjustable viewing direction. The endoscope including: an endoscope shaft having a longitudinal axis, a first optical unit disposed in the endoscope shaft, the first optical unit having a first prism pivotable about a pivot axis in order to deflect light, a second optical unit having at least a second prism for deflecting light, which is again deflected by the first prism, the second prism being arranged in a direction parallel to a longitudinal axis of the endoscope shaft, wherein the first prism has a light exit surface facing the second prism, and the second prism has a light admission surface facing towards the light exit surface of the first prism, and a lifting mechanism for lifting the first prism such that upon actuating the lifting mechanism the first prism executes a lifting movement in the direction of the pivot axis.

Abstract: An endoscopic optical system including: a fiber image conductor arranged in an elongated shaft tube, the fiber image conductor having a proximal face; an objective arranged distally relative to the fiber image conductor; an observation device arranged proximally relative to the proximal face of the fiber image conductor; a mask; and a transparent cover pane arranged between the proximal face of the fiber image conductor and the observation device; wherein the transparent cover pane is configured as a moire filter.

Abstract: The invention relates to a relay set for an endoscope that includes a plurality of relay sets of the same type, having two plano-convex rod lenses which face one another with their planar end surfaces, and an achromat that is arranged between these rod lenses, particularly in a central aperture plane of said relay set. Said achromat takes the form of an arrangement of at least two lenses which have different refractive indices and Abbe numbers, and is located at a distance from the rod lenses. The invention also relates to a corresponding endoscope. The claimed relay set is improved in that one lens of said achromat consists of ED glass that has an Abbe number of at least 75, in particular at least 77.

Abstract: A method for displaying video-endoscopic image data of a video endoscope having at least one lateral viewing direction, wherein at least one objective which is movable relative to an image sensor about the longitudinal axis of a shaft of the video endoscope and has at least one lateral viewing direction is arranged on the distal end of the shaft of the video endoscope, wherein the viewing direction is changed over from a first viewing direction to a second viewing direction on account of a viewing direction changeover command. Also provided are a video endoscopy system wherein the viewing direction can be changed over from a first viewing direction to a second viewing direction on account of a viewing direction changeover command and a software program product comprising program code means for carrying out the above method.

Abstract: An endoscope having an adjustable viewing direction at a viewing angle, the endoscope including: an endoscope shaft having a longitudinal axis, wherein the endoscope shaft has a distal viewing window, a movable optical device for capturing objects provided in the endoscope shaft, and a focusing optical unit arranged between a distal viewing window and the movable optical device, wherein a focal distance of the focusing optical unit is changed in dependence on the viewing angle.

Abstract: An endoscope having an adjustable viewing direction. The endoscope including: an endoscope shaft having a longitudinal axis, a first optical unit disposed in the endoscope shaft, the first optical unit having a first prism pivotable about a pivot axis in order to deflect light, a second optical unit having at least a second prism for deflecting light, which is again deflected by the first prism, the second prism being arranged in a direction parallel to a longitudinal axis of the endoscope shaft, wherein the first prism has a light exit surface facing the second prism, and the second prism has a light admission surface facing towards the light exit surface of the first prism, and a lifting mechanism for lifting the first prism such that upon actuating the lifting mechanism the first prism executes a lifting movement in the direction of the pivot axis.

Abstract: An objective of an oblique viewing, rigid endoscope, including a prism arrangement consisting of distal and proximal prisms contacting with planar contact surfaces that are oblique to an axis of the objective, the distal prism includes a distal front face toward the viewing direction of the objective, from which the rays entering there enter through the distal prism and through a passage area of the contact surfaces into the proximal prism and after double reflection in the proximal prism on a first mirror on a diagonal surface and a second mirror on the contact surface exit in the direction of the axis of the objective through a surface perpendicular to the direction of the axis of the objective, wherein the second mirror is arranged outside the penetration area, and an absorption layer is arranged in the plane of the second mirror between this and the penetration area.

Abstract: An endoscope with lateral illumination including: an endoscope shaft with an outer tube; an input lens arranged in a distal area of the outer tube, the input lens having a viewing direction pivotable in at least one pivot plane; two or more illumination optical-fiber bundles terminating at output surfaces at a distal tip, wherein a first illumination optical-fiber bundle generates an illumination, at a 0° viewing angle, and a second illumination optical-fiber bundle generates an illumination of another area with a lateral viewing angle or lateral viewing-angle range of between 0° and 90°; and one or more light-emitting diodes arranged in or on a circumference of the endoscope shaft in an area of the distal tip, wherein the light-emitting diode(s) is/are arranged in the pivot plane and/or around the pivot plane, in order to generate an illumination at a viewing angle or a viewing-angle range of about 90°.

Abstract: The invention relates to a relay set for an endoscope that includes a plurality of relay sets of the same type, having two plano-convex rod lenses which face one another with their planar end surfaces, and an achromat that is arranged between these rod lenses, particularly in a central aperture plane of said relay set. Said achromat takes the form of an arrangement of at least two lenses which have different refractive indices and Abbe numbers, and is located at a distance from the rod lenses. The invention also relates to a corresponding endoscope. The claimed relay set is improved in that one lens of said achromat consists of ED glass that has an Abbe number of at least 75, in particular at least 77.

Abstract: A method for displaying video-endoscopic image data of a video endoscope having at least one lateral viewing direction, wherein at least one objective which is movable relative to an image sensor about the longitudinal axis of a shaft of the video endoscope and has at least one lateral viewing direction is arranged on the distal end of the shaft of the video endoscope, wherein the viewing direction is changed over from a first viewing direction to a second viewing direction on account of a viewing direction changeover command. Also provided are a video endoscopy system wherein the viewing direction can be changed over from a first viewing direction to a second viewing direction on account of a viewing direction changeover command and a software program product comprising program code means for carrying out the above method.

Abstract: An objective of an oblique viewing, rigid endoscope, including a prism arrangement consisting of distal and proximal prisms contacting with planar contact surfaces that are oblique to an axis of the objective, the distal prism includes a distal front face toward the viewing direction of the objective, from which the rays entering there enter through the distal prism and through a passage area of the contact surfaces into the proximal prism and after double reflection in the proximal prism on a first mirror on a diagonal surface and a second mirror on the contact surface exit in the direction of the axis of the objective through a surface perpendicular to the direction of the axis of the objective, wherein the second mirror is arranged outside the penetration area, and an absorption layer is arranged in the plane of the second mirror between this and the penetration area.

Abstract: A medical light for illuminating fluorescent areas. The medical light including: at least one light-emitting diode with at least one luminophore layer for converting short-wave light into broad-band light; and a control device for controlling illumination from the at least one light-emitting diode, wherein the control device controls a ratio between converted and unconverted light and the converted and unconverted light are emitted over a common light guide.

Abstract: The invention pertains to an objective with two viewing directions for an endoscope, with a first distal objective part aligned with its axis in the first viewing direction, a second objective part aligned with its axis in the second viewing direction, and with a proximal objective part directed with its axis on an image sensor or an image guide, as well as a switching device having a prism for switchably deflecting the light path from the first or second distal objective part into the proximal objective part, wherein the switching device includes a ray switching device that can be brought mechanically into the light path.