Abstract: There is disclosed an anamorphic lens system for increasing the field of view for patients or persons having tunnel vision. The lens assembly consists of a plano-concave cylindrical lens separated from a plano-convex cylindrical lens. The lens system is an anamorphic lens system which minifies in one meridian or axis such as the X axis while keeping objects at the same size in the other meridian such as the Y axis. In utilizing the system, a handicapped patient is now able to maintain almost their original visual acuity in the vertical plane while the system produces minification in the horizontal plane. By using such a technique, the patient retains almost full visual acuity, experiences a substantial increase in his field of vision, and furthermore, does not lose the ability to judge depth.

Abstract: There is disclosed a VIDEO AUTOMATIC FOCUSSING SYSTEM in which a video signal from the television camera is directed to a band pass filter and then detected to produce a DC signal indicative of the video signal as band limited. The detected signal is directed to the inputs of a negative slope detector and peak detector. The detectors monitor the slope of the video signal to form the basis for controlling the motor to achieve automatic focussing on command.

Abstract: There is disclosed a simulator for simulating a reduced peripheral field of view for the eyes of a normal user. The simulator consists of a frame having a front section upon which two eye pieces or binocular tubes are mounted. The frame has adjustable temple pieces which are adjustable in the horizontal direction and are adjustable to provide an angle with respect to the vertical so as to adjust the tilt of the frame when it is being worn by the user. Each binocular tube is associated with a variable iris diaphragm which enables the practitioner to adjust the opening to thereby simulate a different field of view according to the particular visual defects associated with a handicapped user. The simulator has left and right shields depending from the temple sections to prevent side vision when the frame is being accommodated by the user. In employing the simulator the device will provide an accurate replica of a reduced field of view such as that existing in a patient having tunnel vision.

Abstract: There is disclosed a rotary switch assembly which comprises a lamp support plate adapted to accommodate a plurality of switchable lamps. A power contact and a detent plate is positioned above the lamp plate and contains spring loaded power contacts which coact with terminals associated with the lamp support plate to enable energization of any selected one of said plurality of lamps. The power contact and detent plate further includes spring loaded detents which cooperate with detent recesses on the lamp support plate to assure optical alignment. These spring loaded detents are positioned approximately opposite to the power contacts and exert counter balancing forces to assure low shaft friction as the lamp support plate is rotated during lamp selection.

Abstract: An optical coupler which comprises a front clamping section for accomodating an arthoscope. The clamping section includes two semicircular arms which are selectively actuated by a push button. Each arm is biased by a spring which forces the arms to contact and grasp the front end of an arthoscope. Coupled to the other side of the clamp is a focusing section which includes a movable lens. The movable lens is contained within a cylinder and is coupled to an outer cylinder which is slideably positioned with respect to the inner cylinder to enable the lens to move to thereby provide a focusing action. The focusing section is coupled to the input of a television camera. The user can then focus the image from the arthoscope as coupled to the clamping section by means of the focusing section to thereby provide a well defined television signal for many different types of television cameras.

Abstract: A linear switch assembly comprises a planar plate secured to the inner wall of a housing for a light source. A carriage member has a first slot positioned within the edge of the plate member and a second shorter slot on a top adjacent surface. The plate has an extending rigid rod positioned within the second slot to allow the carriage to move along the plate member in a linear direction. Associated with the carriage member are first and second lamp assemblies each having an associated actuatable switch. As the carriage is moved the rod coacts with an operating lever associated with each switch to actuate the switch when the associated lamp assembly is moved into a proper position whereby power is supplied to each lamp assembly only when at the proper operating position.

Abstract: There is disclosed a socket assembly for use with a fiber optic light source to enable accommodation of fiber optic cables of varying diameters. The assembly includes a bottom housing section having a central aperture with a plurality of transverse slots communicating with the aperture. Each slot contains a clamp member which includes a spring located in a hollow of the clamp near the bottom surface. The slot contains an extending post which coacts with the spring when the clamp is retained in the slot. A top housing section is rotatably and movably positioned about the bottom housing and has a central aperture coaxial with the aperture in the bottom housing. The aperture in the top housing is surrounded by a circular flange which coacts with a sloping back surface of each clamp member to push the clamp members into the aperture when the top housing is moved downwardly towards the bottom housing.

Abstract: A microscope body has coupled thereto a lens with the axis of said lens relatively transverse to the optical axis of said microscope. A mirror is positioned with respect to said lens to deflect any light propagating through said lens relatively parallel to the optical axis of said microscope and through the objective lens of said scope to the object plane; and a fiber optic cable is directed at one end to propagate light from a remote source through said lens and thence, to said mirror. Means are provided to prevent spurious light or reflections from the surface of the objective lens from appearing at the visual plane of said microscope.