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US 4,059,347 AGranted
Optical instrument and viewing method
OwnerRichard P. Eitelinventor
Life of this patent
Estimating the term…
Abstract
A see-through zone is provided of a shape and size so that the horizontal end portions of the zone will merge as an image defining a target frame into which the user can center a stationary or moving target by keeping his line of sight properly on the target.
Claims12
An optical device for aiding an individual wearing the device to concentrate his vision on an object, said device comprising:
- a head mount having a horizontal see-through zone with outwardly curved, clearly defined ends spaced apart horizontally about three inches to approximate the pupillary distance of the viewer and extending over a vertical distance sufficient for vertical proximity expansion, said zone having a vertical width through most of its horizontal length as great as at said outwardly curved ends, and
- means for positioning said head mount with said zone centered in front of the viewer's eyes at a distance therefrom such that said outwardly curved ends horizontally approach each other by second degree fusion and vertically elongate by vertical proximity expansion whereby said ends are seen as a generally circular image when the viewer looks through said zone.
An optical device for aiding an individual wearing the device to concentrate his vision on an object, said device comprising:
- viewing means having a horizontal see-through zone therein with clearly defined generally U-shaped ends spaced apart horizontally about three inches to approximate the pupillary distance of the viewer and having a vertical width through most of its horizontal length of about an inch, and
- head mounting means for positioning said viewing means with said zone centered in front of the viewer's eyes at a distance therefrom such that said generally U-shaped ends are jointly seen as a central image when the viewer looks through said zone.
Dependencies are inferred from the claim text.