Title:
【発明の名称】レンズ付きダイビング・マスク及びその製法
Document Type and Number:
Japanese Patent JPH06510215
Kind Code:
A
Abstract:
A diving mask (10) having hemispherically-shaped lenses (12) mounted on a flexible gasket or portion (14) and fitted to the contours of a user's face (16). Laser scanning or topographic mapping is used to determine the contours of the user's face (16). The hemispherically-shaped lenses (12) are then sized to fit the contours of the face (16). As a result, the spherical center of the lenses substantially coincides with the optical nodal point (26) of the user's eyes (24). The hemispherically-shaped lenses (12) may also be designed so that the spherical center of curvature of the hemispherically-shaped lenses (12) substantially coincides with the center of rotation (150) of a user's eyes (24). This virtually eliminates the phenomenon of underwater magnification-distortion caused by the difference in refractive indices of water and air.
Inventors:
Clan House, John
Application Number:
JP50532593A
Publication Date:
November 17, 1994
Filing Date:
August 28, 1992
Export Citation:
Assignee:
Clan House, John
International Classes:
A61F9/02; A63B33/00; B63C11/12; G02C7/02; (IPC1-7): A63B33/00; A61F9/02
Attorney, Agent or Firm:
Shoichi Takezawa (1 person outside)