# US 2021/0080751 A1 · Rotational alignment of interchangeable loupes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0080751 A1 - Document ID: US20210080751A1 - Status: Published application - Kind: A1 - Application number: 17/108,234 - Filed: 2020-12-01 - Published: 2021-03-18 - Earliest claimed: 2017-03-28 - Assignees: Kerr Corporation - Applicants: Kerr Corporation - Inventors: Thomas R. Lindsey; Matthew Christopher Oren; Ramesh Janardhanam - Web page: https://patentgrep.com/patent/US20210080751A1 ## CPC - G02C 7/086: {Auxiliary lenses located directly on a main spectacle lens or in the immediate vicinity of main spectacles} - G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)} - G02B 25/004: {having binocular arrangement} - G02C 3/04: Arrangements for supporting by hand, e.g. lorgnette, Arrangements for supporting by articles (by walking-sticks A45B3/00) - G02C 7/088: {Lens systems mounted to spectacles} - G02B 7/14: adapted to interchange lenses {(G02B7/027 takes precedence)} - G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Rotational alignment apparatus and methods for interchangeable loupe telescope(s) are provided. Some embodiments include an indexing ring including a projection. The ring is fixed to the telescope upon rotational alignment of the telescope. The alignment may involve use of a laser and test fixture. The projection mates with a corresponding indexing notch of a loupe anchoring device. Loupes may comprise one or more anchor assemblies, and one or more interchangeable telescope assemblies. The interchangeable telescope assemblies are held to the anchor assemblies by magnetic attraction between one or more magnets and/or one or more magnetic components affixed to corresponding surfaces of the corresponding assemblies. Mating of the projection with the notch ensures appropriate relative rotational alignment of the assemblies. ## Claims ### Claim 1 An interchangeable loupe device comprising: an anchor assembly; and a telescope assembly defining a central longitudinal axis, an optical axis and a field-of-view plane, the field-of-view plane having a horizontal axis and a vertical axis and wherein the optical axis deviates from the central longitudinal axis, and the telescope assembly is rotatable about the central longitudinal axis to an orientation such that deviation of the optical axis is oriented along the horizontal axis of the field-of-view plane; wherein the telescope assembly comprises a geometric feature that is configured to mate with a corresponding geometric feature in the anchor assembly and thereby fix orientation of the deviation of the optical axis along the horizontal axis. ### Claim 2 (depends on 1) The interchangeable loupe device of claim 1, wherein deviation of the optical axis is sufficient to cause more than 0.5 prism diopters of vertical imbalance to a practitioner using the interchangeable loupe device at a working distance of 0.3 to 0.7 meters. ### Claim 3 (depends on 2) The interchangeable loupe device of claim 2 wherein: the geometric feature comprises a protrusion; and the corresponding geometric feature comprises a notch configured to receive the protrusion. ### Claim 4 (depends on 1) The interchangeable loupe device of claim 1 wherein the telescope assembly is held to the anchor assembly by magnetic attraction between a first magnetic element of the telescope assembly and a second magnetic element of the anchor assembly. ### Claim 5 (depends on 4) The interchangeable loupe device of claim 4 wherein the first magnetic element comprises a steel ring. ### Claim 6 (depends on 5) The interchangeable loupe device of claim 5 wherein the steel ring comprises the geometric feature. ### Claim 7 (depends on 5) The interchangeable loupe device of claim 5 wherein the steel ring is configured to be fixed to the telescope assembly after orienting deviation of the optical axis along the horizontal axis. ### Claim 8 (depends on 1) The interchangeable loupe device of claim 1 wherein the geometric feature is externally visible after the geometric feature of the telescope assembly mates with the corresponding geometric feature of the anchor assembly. ### Claim 9 (depends on 1) The interchangeable loupe device of claim 1 wherein the telescope assembly is a first telescope assembly, the loupe device further comprising a second telescope assembly. ### Claim 10 (depends on 9) The interchangeable loupe device of claim 9 wherein: the first telescope assembly provides a first magnification level; and the second telescope assembly provides a second magnification level. ### Claim 11 (depends on 10) The interchangeable loupe device of claim 10, wherein: the first telescope assembly is configured to mate with the anchor assembly; and the second telescope assembly is configured to mate with the anchor assembly. ### Claim 12 (depends on 9) The interchangeable loupe device of claim 9 wherein: the anchor assembly is a first anchor assembly; the first telescope assembly is configured to mate with the first anchor assembly; and the second telescope assembly is configured to mate with a second anchor assembly. ### Claim 13 A loupe device for magnifying an object, the loupe device having a proximal end and a distal end and comprising: a frame comprising: a carrier lens; and an anchor assembly; and an interchangeable telescope assembly having a weight and defining a field-of-view plane, the interchangeable telescope assembly comprising at least one magnification lens and configured to mate with the anchor assembly, wherein mating of the interchangeable telescope assembly and the anchor assembly prevents rotation of the telescope assembly relative to the anchor assembly; wherein, upon a mating of the interchangeable telescope assembly and the anchor assembly: the interchangeable telescope assembly is held to the anchor assembly by magnetic attraction; and an indexing ring affixed to the interchangeable telescope assembly orients the interchangeable telescope assembly relative to the anchor assembly such that deviation of an optical axis of the telescope is oriented along a horizontal axis of the field-of-view-plane. ### Claim 14 (depends on 13) The loupe device of claim 13 wherein the interchangeable telescope assembly comprises at least one magnetic element and the anchor assembly comprises at least one magnetic element. ### Claim 15 A loupe device for magnifying an object spaced apart from the loupe device, the loupe device comprising: an anchor assembly comprising: an anchor body having a first geometric feature; and a first magnetic element; and an interchangeable telescope assembly, comprising: a magnification lens; a second magnetic element; and an indexing ring comprising a second geometric feature configured to mate with the first geometric feature; wherein: the interchangeable telescope assembly is configured to be held to the anchor assembly by magnetic attraction between the first magnetic element and the second magnetic element; and the second geometric feature, when mated with the first geometric feature, rotationally fixes the interchangeable telescope assembly with respect to the anchor assembly. ### Claim 16 (depends on 15) The loupe device of claim 15 wherein, the second geometric feature, when mated with the first geometric feature, rotationally fixes the interchangeable ‘telescope assembly with respect to the anchor assembly such that any deviation associated with an optical axis of the interchangeable telescope assembly is fixed in a pre-defined orientation. ### Claim 17 (depends on 16) The loupe device of claim 16, wherein the pre-defined orientation substantially eliminates diplopia when viewing the object through the interchangeable telescope assembly. ### Claim 18 A method of manufacturing a loupe system, the loupe system comprising an anchor assembly and an interchangeable telescope assembly, the interchangeable telescope assembly having a proximal end configured to be releasably fixed to a distal end of the anchor assembly, the method comprising the steps of: determining an alignment of an optical axis of the interchangeable telescope assembly that minimizes vertical deviation of the optical axis; and fixing an indexing ring to the interchangeable telescope assembly, such that the indexing ring positions the interchangeable telescope assembly, when the interchangeable telescope assembly is releasably fixed to the anchor assembly, in the alignment that minimizes vertical deviation of the optical axis. ### Claim 19 (depends on 18) The method of claim 18 wherein the determining includes laser aligning the optical axis using a test fixture. ### Claim 20 (depends on 18) The method of claim 18 further comprising: forming a projection in the indexing ring; and forming a notch in the anchor assembly, the notch configured to receive the projection. ### Claim 21 (depends on 18) The method of claim 18 further comprising: forming a notch in the indexing ring; and forming a projection in the anchor assembly that is configured to mate with the notch.