BACKGROUND OF THE INVENTION The game of golf consists of two almost completely independent phases of play for each hole, the first being one or more powerful strokes to advance the ball from the teeing ground to a position on the putting green. The second phase consists of one or more carefully directed light strokes to advance the ball by rolling it into the cup.

Since the game of golf is centuries old and enjoys immense popularity around the world the attention that has been given to each phase of the game is enormous. The design and layout of the course itself, the multitude of club designs for each phase of play, the ball, and the putting green all have been exhaustively treated in both the literature and actual embodiments. The putting green alone remains an enigma that consumes more care and attention per square foot than any other part of the course and more time by the players scrutinizing the surface of the green before deciding on the line and speed for stroking a putt.

BRIEF SUMMARY OF THE INVENTION The present invention provides for viewing the surface of a putting green to reveal more detail of the putting surface than can ordinarily be seen by the unaided human eye.

As previously mentioned, the putting green surface is essentially unique in the practice of agrology. This preparation is followed by contouring the surface and almost daily attention to the vitality of the grass surface to keep it growing under extremely close mowing. This procedure results in the putting surface that is presented to and closely studied by the serious golfer in preparation for stroking a putt.

The present invention uses linear polarizing lenses to reveal to the player during the normal course of play a unique view of the putting surface in the nature of a mosaic which can supplement the golfer's normal view as an aid in deciding the direction and speed for the putting stroke. The lenses may be preferably clear or tinted, for example

they may be only slightly tinted to assure the maximum flux to the retinas. Apparatus is also provided for selective movement of the lenses in and out of the line of sight of the golfer.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a rudimentary sketch of the principle components of human vision: eyes, optic nerves and brain.

Fig. 2 is a view representing the invention in actual use during putting in a typical foursome round of play.

Fig. 3 is a schematic view of a frame such as found in a pair of ordinary clip-on type sunglasses, but with the lenses having 45° complementary linear polarization and being supported on a horizontal pivot axis to permit the lenses to be rotated out of the line of vision of the supporting eyeglasses.

Figs. 4A and 4B are diagrams illustrating the ability of the golfer wearing the glasses of Fig. 3 to sweep the linear polarization reception angles between approximately zero and ninety degrees.

Fig. 5 is a view of an eyeglass frame having the linear polarization lenses supported on a horizontal axis for partial rotation between down for vision through the lenses and in tip-up position, as shown, for clear vision.

Fig. 6 is a partial view of a headpiece, which supports on a horizontal axis the linear polarizer lenses shown in the wearer's line of vision, said lenses rotatable on said horizontal axis to be stored out of the line of vision of the wearer.

DETAILED DESCRIPTION OF THE INVENTION Fig. 1 is a rudimentary sketch of the human eye-brain visual complex. A left eye 11 and a right eye 12 form the visual image stumuli on the respective retinas that are conveyed by optic nerves of each eye to the brain 10. As shown, an optic nerve 13 carries these signals from the left eye 11 to a right half 15 of the brain 10 while an optic nerve 14 carries the signals from the right eye 12 to a left half 16 of the brain 10. The crossover of these nerve signals occurs in an optic chiasm 17. Other nerve pathways exist without the crossover pathways.

None of this eye-brain physiology is apparent to an individual with normal eyesight but it provides the essential capability for such an individual to perceive the reality he observes by erecting a coherrent view from the distinct left and right eye signal sources.

The present invention utilizes a unique property of linear polarizers which are oriented with the maximum transmission angles at preferably 90° thereby presenting two distinct images of the same scene to the right and left retinas. These non coherent images are processed by the eye-brain system to present an erect image that emphasizes the subtle surface differences which result from variations in the viewed surface that cannot be seen with the unaided eyes.

In a normal round of golf, a foursome has a starting time between a preceding foursome and a following foursome. The usual interval between starting foursomes is between 8 and 10 minutes and in serious (e. g. tournament) play, each foursome is expected to keep pace without slowing the progress of the players on the course. The Rules of Golf provide serious penalties for infractions including slow play.

Fig. 2 shows a golfer 18 in the usual crouch position behind the ball 20 in play using an embodiment 19 for practicing the invention during actual play. The invention provides for rapid easy viewing of the putting surface by the polarizer optical path and the ability to alternate the direct view image and the polarizer altered image rapidly thereby providing the golfer the opportunity to synthesize the two views in his own mental evaluation. The invention thus provides a means for synthesizing an image which has significantly more information than the direct view. The complex analysis as described does not impose any substantial delay compared to the normal care serious golfers use in preparing to putt.

Fig. 3 shows a conventional clip-on type frame, as used in sunglasses, to provide easy temporary attachment to a pair of eyeglasses for a pair of linear polarizer lenses 23 and 24 oriented in a positive dihedral angle, as indicated, at complementary 45° angles of maximum transmission. The lenses 23 and 24 have tabs 21,22 as an aid so they can be tipped upward, as indicated at 23', 24'in Fig. 3 out of the line of vision of the supporting eyeglasses. This type of frame, in addition to being convenient to use, also permits the golfer to scrutinize the putting surface conveniently with and without the polarized

image thereby supplementing the information he can utilize in making his decision on his putting stroke.

Figs. 4A and 4B taken together illustrate a technique the golfer can use to sweep the linear polarization orientation over the field of view. Consider the wearer is looking through the lenses of Fig. 3 with the preferred 45° orientation as described for Fig. 3, that is, looking into and through the plane of the paper.

The plane of polarization of lens 23 in Fig. 3 is indicated in Fig. 4A by the 45° inclination of line 31. Similarly the plane of polarization of lens 24 in Fig. 3 is indicated in Fig. 4B by the 45° inclination of line 32. Now while viewing the putting surface with the glasses of Fig. 3 the golfer by standing erect and tilting his head from side to side can see variations in the putting surface as viewed through complementary angled lenses rotated through a range approaching vertical-horizontal and horizontal-vertical. Thus with a left-tilt of the golfer's head the polarization plane 32 in Fig. 4B approaches horizontal represented as 32L while the polarization plane 31 in Fig. 4A approaches vertical represented as 31L.

The sweep is reversed for a right-tilt of the golfer's head with the plane 31 in Fig. 4A approaching horizontal represented as 31R while the plane 32 in Fig. 4B approaches vertical represented as 32R.

Fig. 5 shows the invention assembled in a frame 51 similar to those used by anglers with ordinary sunglass lenses which are usually horizontally polarized. The frame 51 has the usual structures for wearing, such as nosepiece 52 and ear pieces 53.

Mounted on the frame by a pivot support 54 is a frame 55 having two lens apertures for supporting the lenses 56,57 for either line of sight binocular vision through the lenses or tip-up position, as shown, out of the line of sight. In accordance with the invention the lenses 56,57 are linear polarizer lenses mounted with their planes of maximum transmission oriented approximately 45° to horizontal and approximately complementary.

Fig. 6 shows another version of support for wearing this invention such as a cap or sunshade with a forward projecting bill 58 with a substantially flat under surface 59.

Supported on said under surface 59 is a frame 61 having two linear polarizer lenses 62, 63 mounted on said frame with planes of maximum transmission being approximately 45° to horizontal when used in the line of vision and approximately complementary.

The support frame 61 for said lenses 62,63 can be pivoted on said undersurface 59 between vertical line of sight and tip-up storage positions. The lenses 62,62 have tabs 60 to facilitate manual"down"and"up"positions.

Thus, as described, the golfer without significant delay of play can view the polarizer altered image of the surface of the putting green and by convenient repetitive altering of his view between direct view and polarizer altered view mentally synthesize a view with significantly more information than is present in the separate views.

Many other embodiments of head supported structures exist suitable for supporting binocular vision lenses in alternate positions of line of sight vision and storage out of line of sight which can be adapted to practice the invention.

What is claimed: