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US 5,966,239 AGranted
Binocular magnifying glasses
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsMoriyasu Shirayanagi, Tomohiko Kanzaki
Life of this patent
Estimating the term…
Abstract
Binocular magnifying glasses include a pair of magnifying optical systems, one system for each of the left and right eyes. Each optical system has an objective lens having a positive power and an eyepiece having a negative power arranged in that order from the object side in. The optical center of at least one eyepiece is positioned outside of a line connecting the center of rotation of the eye and the object point.
Claims19
Binocular magnifying glasses, comprising:
- a pair of magnifying optical systems, one magnifying optical system for a left eye and one magnifying optical system for a right eye, each magnifying optical system comprising:
- an objective lens having a positive power, and an eyepiece having a negative power, arranged in this order from an object side, wherein
- an optical center of each objective lens and an optical center of each eyepiece both optically deviate outside of a line connecting a center of rotation of each eye of a user and an objective point, a distance between said optical centers of said eyepieces being fixed.
A magnifying glass comprising:
- a pair of objective lenses;
- and
- a pair of eyepieces, wherein an optical center of each objective lens of said pair of objective lenses and an optical center of each eyepiece of said pair of eyepieces are both optically offset outside of a line connecting a center of rotation of each eye of a user and an objective point, further comprising a moving mechanism mounting each said eyepiece for movement so that a position of said optical center of each eyepiece is adjustable outside of said line.
Binocular magnifying glasses, comprising:
- a pair of magnifying optical systems, one magnifying optical system for a left eye and one magnifying optical system for a right eye, each magnifying optical system comprising:
- an objective lens having a positive power, and an eyepiece having a negative power, arranged in this order from an object side, wherein
- an optical center of each objective lens and an optical center of each eyepiece both deviate outside of a line connecting a center of rotation of each eye of a user and an objective point, a distance between said optical centers of said eyepieces being adjustable.
Binocular magnifying glasses, comprising:
- a pair of magnifying optical systems, one magnifying optical system for each eye of a user, each magnifying optical system comprising:
- an objective lens having a positive power, and an eyepiece lens having a negative power, arranged in this order from an object side, wherein
- an optical center of each objective lens and an optical center of each eyepiece lens both optically deviate outside of a line connecting a center of rotation of each eye of the user and an objective point, a distance between said optical centers of said eyepiece lenses being adjustable, and
- wherein a ratio of an effective diameter of said eyepiece lens in a horizontal direction to an effective diameter of said eyepiece lens in a vertical direction is larger than a ratio of an effective diameter of said objective lens in a horizontal direction to an effective diameter of said objective lens in a vertical direction.
1 more element
Dependencies are inferred from the claim text.