U.S. Philips Corporation

United States Surgical Corporation

Jorg Brambring

Dennis C Leiner

William G Peck

Theodorus Wynandus Van Den Berg

Willem Jan Voormolen

Dirk Jan Broer

Adrianus J De Vaan

Antonius W Van Der Heijden

Robert F Van Der Ven

Johannes M Spruyt

An arthroscope includes an frame member, an illumination system and a light guide connection port associated with the frame member for connecting to a light guide to transfer illumination light to the illumination system. The light guide connection port includes a support member having a tapered inner wall portion for supporting a transmissive element having a tapered portion. The support member includes a plurality of inner mounting projections extending from the tapered inner wall portion and being radially arranged and positioned to contact the outer surface of the light transmissive element to maintain the light transmissive element in spaced relation relative to the tapered inner wall portion.

Light guide connection port for a disposable arthroscope

A method for forming an arthroscope having an inclined angle of view includes providing an inner lens tube member, an outer tube member, and an annular shim member. The annular shim member is positioned about an outer peripheral portion of the inner lens tube member and includes an upper portion defining an outer positioning surface and side edges angularly offset relative to an optical axis. The inner lens tube member and annular shim member are positioned within the outer tube member while a plurality of optical fibers are positioned therebetween. The optical fibers are oriented about the outer positioning surface and side edges such that the optical fibers are angularly offset relative to the optical axis. Alternatively, a shim member may be provided that is arcuate and defines a cross-sectional dimension approximating a maximum inner dimension of the outer tube member, wherein the shim member engages the outer tube member to stabilize the inner lens tube member therein.

Method of making arthroscope having a shim for angularly orienting

A disposable rigid arthroscope having an inclined angle of view includes a frame member, an outer tube member extending distally from the frame member, an inner lens tube member eccentrically disposed within the outer tube member, an optical system disposed within the inner lens tube member and having a mechanism for altering the field of view of the optical system with respect to the optical axis and an illumination system including a plurality of optical fibers. The optical fibers of the illumination system are oriented by a shim member to emit light in the general direction of the inclined field of view to sufficiently illuminate the surgical field. The shim member includes opposed side edges that are angularly oriented relative to the optical axis and a proximal end portion extending along an inner periphery of the outer tube member to define a major cross-sectional dimension approximating a maximum inner dimension of the outer tube member.

Arthroscope with shim for angularly orienting illumination fibers

In a polarization-sensitive beam splitter 10 having a polarization-separating layer 13 interposed between two transparent elements 11, 12, the two transparent elements consist of non-birefringent material and the polarization-separating layer is a polarizing birefringent oriented polymer adhesive layer. The polarization-separating layer is manufactured from a curable synthetic resin composition comprising liquid-crystalline monomers or oligomers, the molecules in the curable synthetic resin composition being oriented uniaxially after which the synthetic resin composition is cured.

Polarization-sensitive beam splitter having a polarizing birefringent

A color display tube includes in an evacuated envelope, an electron gun system for producing three electron beams directed onto a display window. For each electron beam the electron gun system is provided with a cathode which is secured in a cup-shaped control grid having an aperture. The control grids are secured to a cup-shaped anode by means of a plate of electrically insulating material. The electron gun system may be constructed with a focusing electrode which is common for the three electron beams and a common accelerating electrode. A sleeve-shaped electrode may be secured to the anode and the focusing electrode is secured thereto by means of a ring of electrically insulating material.

Color display tube with control grid positioning feature

The haze around the electron beam spot in the corners and at the edge of the display screen is reduced by using in the electron gun a first grid of a construction such that a multipole lens which is mainly a first quadrupole lens is formed in cooperation with the cathode. The first grid in cooperation with the second grid also forms a multipole lens which is also a mainly second quadrupole lens and which is rotated 90.degree. with respect to the first quadrupole lens. Such a system of lenses in the first grid can be formed, for example, by providing in the first grid an aperture with elongated openings both on the side of the cathode and on the side of the second grid. The longitudinal axis of the elongated opening on the side of the cathode is substantially at right angles to the longitudinal axis of the elongated opening on the side of the second grid.

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Eindhoven, Netherlands

Jorg Brambring