Bioptic telescope system for use with bifocal spectacle
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United States of America Patent
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Jul 30, 1996
Grant Date -
N/A
app pub date -
Oct 27, 1994
filing date -
Oct 27, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for allowing a user who wears spectacles including at least one lens having a positive magnification factor, to view a distant object through both the lens of the spectacles and a telescope. The method comprises the step of positioning a lens in the optical path of the telescope. The lens placed in the optical path of the telescope is adapted to cancel the positive magnification factor of the lens of the spectacles to maintain the afocal characteristic of telescope. The apparatus comprises at least one afocal telescope defining an optical path having a first lens oriented in the optical path for magnifying a distant object to be viewed through the afocal telescope system. The telescope further comprises a second lens oriented in the optical path for cancelling the positive magnification factor of the lens to maintain the afocal characteristic of the telescope.
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