Diving mask having distortionless peripheral vision

An underwater vision device comprising:

• a) a supporting member arranged for sealing engagement with the face of the user;
• and
• b) lens means mounted in said supporting member;
• c) said lens means being generally curved in a predetermined manner, a portion of which is made from a quantity of material generated as an aspherical surface of incrementally decreasing radii beginning from a predetermined central point.

An underwater vision device, comprising:

• a) a supporting member arranged for sealing engagement with the face of the user, and
• b) a lens means mounted in said supporting member;
• c) a central portion of said lens means being spherical and having a single radius of curvature for a substantial portion thereof, whereby the apparent magnification of images underwater is less than that observed through a conventional lens plate;
• d) predetermined portions of said lens means being further curved with a radius of curvature less than that of the central portion of said lens means to provide lens means portions of aspherical configuration.

An underwater vision device, comprising:

• a) a supporting member arranged for sealing engagement with the face of the user;
• and
• b) a lens means mounted in said supporting member;
• c) said lens means being generally curved so that multiple radii of curvature are incorporated on the same optical surface of the lens means in such a predetermined manner that radius of curvature decreases progressively with increasing distance away from a predetermined central point on the lens means surface.

An underwater vision device, comprising:

• a) a supporting member for sealing engagement with the face of the user;
• and
• b) a lens means mounted in said supporting member;
• c) said lens means being inverted with its convex side facing towards the eyes of the user to effect a magnified underwater image;
• d) said lens means being generally curved so that multiple radii of curvature are incorporated on the same optical surface of the lens means i such a predetermined manner that radius of curvature increases progressively with increasing distance away from a predetermined central point on the lens means surface.

A diving mask comprising:

• a) a supporting member arranged for sealing engagement with the face of the user, and
• b) a lens means mounted in said supporting member, said supporting member being dimensioned so that the lens means is positioned near the eyes of the user with a portion of the nose extending forwardly of the lens means to provide a low profile, low internal volume mask;
• c) a central portion of said lens means being substantially spherical in configuration and having a radius of curvature and a single center of curvature, whereby the apparent magnification of images underwater is less than that observed through a conventional lens plate;
• d) a predetermined portion of said lens means being further curved with a radius of curvature less than that of said lens means to provide a lens mean portion of aspherical configuration to minimize optical distortions.