Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00163—Optical arrangements
  • A61B1/00195—Optical arrangements with eyepieces
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00064—Constructional details of the endoscope body
  • A61B1/0011—Manufacturing of endoscope parts
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00131—Accessories for endoscopes
  • A61B1/00137—End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
  • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
  • G02B23/2407—Optical details
  • G02B23/2453—Optical details of the proximal end
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
  • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
  • G02B23/2476—Non-optical details, e.g. housings, mountings, supports
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images

Definitions

• the invention relates to an eyepiece for a surgical instrument, in particular endoscope or laparoscope, with an eyepiece for an optical assembly, wherein a plane glass is accommodated in a holder and wherein the holder for the flat glass with the eyepiece is connected or connected.
• the invention relates to a surgical instrument, in particular endoscope or laparoscope.
• Minimally invasive endoscopic procedures on the human or animal body are accomplished by elongated shaft endoscopes inserted into a body cavity through an existing or pre-meshed body opening for that purpose. Since a direct view from outside on the surgical field in the body cavity is not possible, known endoscopes allow a view into the body cavity to be treated.
• conventional endoscopes have an optic with one or more lenses at the distal tip of the endoscope shaft directing light from the body cavity into the endoscope.
• the endoscope shaft may include an array of lenses, such as rod lenses, by which light is directed out of the body cavity to the proximal end of the endoscope, ie. to the end that is held and operated by a surgeon or surgeon.
• an eyepiece funnel with an eyepiece, ie an optic, from which the light which enters at the distal tip of the endoscope emerges again.
• an eyepiece can be used for direct observation with the naked eye, which is brought to the Okulartrichter.
• the object of the invention is in surgical instruments a reflection-free detection of images, in particular by means of an image sensor unit to ermögl ichen, the design complexity should be kept as low as possible.
• an eyepiece for a surgical instrument in particular endoscope or laparoscope
• an eyepiece for an optical assembly wherein a plane glass is accommodated in a holder and wherein the eyepiece is connectable or connected to the holder for the plane glass
• the plano glass a common side edge is provided with a contact surface for the eyepiece and a contact surface for the holder, the surface normal of the Planglases and Okular charged facing contact surface of the Planglases, preferably when receiving the Planglases in the holder at an angle not equal to 0 °, preferably at an angle between 2.0 ° to 10.0 °, are aligned with each other.
• the invention is based on the idea that, in the case of the ocular device of a surgical instrument, the surface normal of the plano-lens which faces the eyepiece mount is at an angle not equal to 0 ° relative to the optical axis of the optical assembly received in the eyepiece 0 °), ie. not parallel to each other, is aligned.
• the inlet side and the outlet side or the surfaces of the Planglases are aligned with respect to the vertical plane to the optical axis of the eyepiece at an angle not equal to 0 °, whereby upon passage of light rays through the plane glass or the eyepiece no reflections within the Planglases arise and avoid possible artifacts due to (light) reflections in an image capture sensor.
• plano glass when the Planglases in the eyepiece is arranged by the widened side edge of the Planglases a contact surface is provided on the plano glass, which is aligned perpendicular to the optical or mechanical axis of the eyepiece or to the optical axis of the optical assembly of the eyepiece.
• the plane glass is designed as a flat eyepiece for the eyepiece and has two parallel surfaces through which the light rays pass.
• the surfaces of the Planglases each have a corresponding surface normal, which are perpendicular to the flat surface of the Planglases.
• the plane glass is made of sapphire.
• the planned eyepiece plano glass is preferably with a peripheral widened side edge is formed, wherein provided by the side edge bearing surface for the eyepiece is aligned at an angle to the surfaces of the Planglases, which corresponds to the angle between the surface normal of the Planglases and the optical axis of the received in the Okular charged optical assembly.
• a flat stop shoulder for the plane glass is formed, wherein the mutually parallel surfaces of the Planglases are arranged obliquely to the otherwise vertical orientation of the Planglases (according to the prior art).
• the widened side edge of the Planglases is in this case formed as a plane stop shoulder, wherein the planar stop shoulder is formed as a widened side edge at an acute angle to one or both surfaces of the Planglases.
• the surface normal or surface normal of the Planglases and the Okular charged facing contact surface of the Planglases at an angle between 4.0 ° to 8.0 °, in particular at an angle of 6 ° are aligned. Accordingly, the widened side edge of the Planglases with the contact surface for the eyepiece is formed at an angle of 4.0 ° to 8.0 °, in particular at an angle of 6 °, for example, to the surface at the distal entrance side of the Planglases.
• the widened, preferably circumferential, side edge of the Planglases or the eyepiece is positively and functionally complementary recorded in a receptacle of the holder.
• the plane glass can be designed in a cylindrical design in a cyl.
• the widened side edge of the Planglases is ring-shaped.
• the holder is preferably designed as a union nut, preferably with an internal thread.
• the holder provided as a union nut with an internal thread cooperates with an external thread on the eyepiece mount.
• the optical assembly accommodated in the eyepiece mount has one or more lenses and optionally further optical elements.
• the holder is made of plastic, wherein the holder in the training as a union nut has an inner bevel suitable for plane glass, which covers and compensates for a projection of the Planglases or eyepiece glass.
• an embodiment of the eyepiece device is characterized in that the holder, in particular cap nut, is formed on the side facing away from the plane glass with a trough.
• the eyepiece device of the surgical instrument that the eyepiece facing away, ie. Proximal side of the Planglases flush with the plane glass surrounding area or edge region of the holder, in particular with the peripheral glass surrounding the edge portion of the trough of the holder is aligned.
• an eyepiece funnel is arranged or can be arranged on the holder.
• the eyepiece funnel is screwed, for example, to the housing for the eyepiece holder, wherein the eyepiece funnel is adapted on the inside to the holder or the union nut and is furthermore preferably formed with a recess for a radial seal (for example for an O-ring).
• the object is achieved by a surgical instrument, in particular endoscope or laparoscope, which is formed with an eyepiece device described above.
• a surgical instrument in particular endoscope or laparoscope, which is formed with an eyepiece device described above.
• an eyepiece device according to the invention, reflections in the plane glass during recording with an image sensor device as well as ghost images due to reflections through the eyepiece window or the proximal plane glass of the eyepiece are avoided.
• Fig. 1 is a schematic side view of an endoscope
• Fig. 2 schematically shows a cross section through an eyepiece of a
• FIG. 3 is a schematic side view of a plano-glass designed as an ocular window.
• Fig. 1 shows a schematic side view of an endoscope 1. which has a tubular shaft 2 with an optic at the distal end.
• This tubular shaft 2 is inserted through a body opening into a body cavity during a minimally invasive procedure or a minimally invasive examination.
• the tubular shaft 2 opens into a housing 3, which in turn at the proximal end, i. at the end, which is arranged towards the surgeon or surgeon, opens into an eyepiece funnel 4 with an eyepiece, not shown.
• the housing 3 also serves to handle the endoscope 1.
• a light source 5 in particular an LED light source, is arranged, which introduces bright light from the side into the optics of the endoscope 1, from where the light introduced at the distal end, ie. emerges at the tip of the tubular shaft 2 to illuminate an operating field.
• the light source 5 has a connection cable 5a.
• the light source 5 may be an adapter act, to which a fiber optic bundle is attached as a connection cable 5a. The light supplied by the glass fiber bundle is then introduced into the endoscope 1 by means of the adapter.
• it may be an active light source 5, for example based on LEDs, halogen bulbs or the like, in which case the connection cable 5a is a power supply cable.
• a schematically illustrated camera head 6 is arranged with an eyepiece adapter, not shown, which detects the emerging from the eyepiece of the endoscope 1 light with its own optics and focused on an optical surface sensor, such as a CCD chip.
• an optical surface sensor such as a CCD chip.
• FIG. 2 schematically shows a cross section through an eyepiece on the proximal end of the endoscope in the cutout.
• the eyepiece has an eyepiece socket 1 2, in which e.g. (not shown here) imaging lenses are arranged as an optical assembly.
• the eyepiece has an optical axis 13 of the optical assembly.
• a plane glass 14 is arranged, which is received in a provided with a recess union nut 16.
• the union nut 1 6 has an internal thread which cooperates with an external thread of the eyepiece 1 2.
• an eyepiece funnel 1 8 ordered which has a funnel trough 1 9.
• the held by the nut 1 6 Plange glass 14 has a light entrance side 1 5.1 and a light exit side 15.2, which are aligned parallel to each other.
• the light entrance side 1 5.1 and the light exit side 15.2 are aligned at an angle 90 ° to the optical axis 1 3.
• the optical axis 1 3 is collinear with the mechanical axis of the eyepiece.
• the plane glass 14 has a holding shoulder 17. Due to the circumferential holding shoulder 17 as a plane stop shoulder, a plane surface for engagement with the proximal opening of the eyepiece socket 1 2 is provided.
• the retaining shoulder 1 7 is in this case at an angle of 6 ° to the plane of the light entrance side 1 5.1 and the light exit side 1 5.2 of the Planglases 14 aligned.
• the surface normals of the parallel light entrance side 15.1 and light exit side 1 5.2 of the plane glass 14 are aligned at an angle of 6 ° to the optical axis 1 3.
• FIG. 3 schematically shows an enlarged view of the plane glass 14 according to the invention.
• the contact shoulder pointing from the retaining shoulder 17 to the eyepiece mount 12 is in this case a plane surface which is aligned perpendicular to the optical axis 1 3 or to the mechanical axis of the eyepiece mount.
• the proximal contact surface of the retaining shoulder 1 7 is in this case arranged in a form-complementary recess of the union nut 16.
• the union nut 16 is preferably made of plastic and further preferably has a light exit side 1 5.2 of the Planglases 14 formed inner slope, whereby the union nut 16 has a recess 21 on the proximal side.
• the union nut 1 6 is formed on the proximal side so that the trough 21 with the adjoining the plane glass 14 region and the proximal surface, ie. the light exit side 15.2 of the Planglases 14 are aligned flush.

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• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Surgery (AREA)
• Optics & Photonics (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Veterinary Medicine (AREA)
• Pathology (AREA)
• Radiology & Medical Imaging (AREA)
• Biophysics (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Public Health (AREA)
• Heart & Thoracic Surgery (AREA)
• Medical Informatics (AREA)
• Molecular Biology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• General Physics & Mathematics (AREA)
• Astronomy & Astrophysics (AREA)
• Manufacturing & Machinery (AREA)
• Endoscopes (AREA)
• Instruments For Viewing The Inside Of Hollow Bodies (AREA)
• Lenses (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Related Child Applications (1)

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• 2015
  • 2015-02-06 DE DE102015202137.8A patent/DE102015202137A1/de not_active Ceased
• 2016
  • 2016-01-15 EP EP16700813.5A patent/EP3253271B1/de active Active
  • 2016-01-15 WO PCT/EP2016/050752 patent/WO2016124370A1/de not_active Ceased
  • 2016-01-15 JP JP2017541264A patent/JP6590934B2/ja not_active Expired - Fee Related
• 2017
  • 2017-07-27 US US15/661,179 patent/US10595713B2/en active Active

Patent Citations (3)

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