Abstract: A device for admitting light into a photodetecting apparatus such as an automatic white balance sensor includes a light-diffusing plate having a light admitting face for receiving light and a light issuing face from which diffuse light emerges. A reflecting layer is formed on at least a surface of the light-diffusing plate which is opposite the light admitting face.

Abstract: An optical fiber assembly is used to conduct incident light from, e.g., a light-diffusing plate to a photodetecting apparatus such as an automatic white balance sensor equipped with an RGB filter. The light-admitting ends of the fibers are distributed substantially uniformly across the light-admitting end of the fiber assembly, and the light-issuing ends of the fibers are arranged in a predetermined pattern, e.g., they are grouped in accordance with the arrangement of the RGB filter.

Abstract: A release switch apparatus having a release button which is supported in a camera body so as to move between an initial position and a specific operational position in which the release button is pushed down. The apparatus includes a light emitter provided in the release button or in the vicinity thereof and an emission controller for causing the light emitter to emit light when the release button is moved from the initial position. A light receiver is provided in the camera body or in the release button to receive light emitted from the light emitter, and a controller is provided which operates in response to the output to the light receiver.

Abstract: A golf ball with improved flight distance is disclosed. The golf ball has at least three pluralities of dimples in its spherical surface. The dimples of each plurality share the same diameter and depth characteristics, such characteristics varying from the corresponding diameter and depth characteristics of the dimples of the other pluralities of dimples. However, the ratio of the diameter to depth of the dimples of a particular plurality of dimples approximates the ratio of the dimples in every other plurality of dimples such that the difference between the ratio of the dimple of one plurality of dimples and any other plurality of dimples is less than 0.3.

Abstract: A thread-wound golf ball comprising; a liquid center having a diameter in the range of 26 to 30 mm and having a hollow spherical center backing with a liquid contained therein, a thread rubber layer, and a cover thereon, said center backing being formed of a rubber material selected from the group consisting of natural rubber and blends of natural rubber having a JIS A hardness of 44 to 58 and a thickness of 1.7 to 2.3 mm, said liquid having a specific gravity of 1.01 to 2.5, and said liquid center exhibiting a deflection of 10 mm under a load of 1 to 2 kg and a deflection of 15 mm under a load of 3 to 6.5 kg.

Abstract: A golf ball having at least three different sizes of dimples and whose total dimple area quotient is optimized for increasing the golf ball's flying distance. The dimple area quotient represents the sum of the surface area indexes of all dimples divided by the surface area of the ball. The golf ball contains a plurality of dimples disposed about the spherical surface of the golf ball, and said plurality of dimples includes at least three types of dimples, said plurality of dimples having a total dimple surface area quotient Dst of at least 4, wherein the total dimple surface area quotient Dst is defined as: ##EQU1## wherein n is a positive integer of at least 3, k is one of plurality of discrete dimple groups covering the spherical surface of said golf ball,Nk is the number of dimples belonging to a group k, wherein k is 1, 2, 3, . . .

Abstract: A covering composition comprising an ionomer resin and a low-molecular weight polyethylene wax has improved impact resistance. A golf ball having a core enclosed in a cover thereof is fully durable and exhibits satisfactory flying performance.

Abstract: A golf ball having at least three types of dimples arranged in a specific distribution pattern has improved aerodynamic symmetry and offers consistent flying performance. Three phantom orthogonal great circles are drawn on the spherical surface of the ball to define eight spherical regular triangles, and phantom perpendiculars are extended from the three apexes of each spherical regular triangle to the opposite sides to divide the spherical regular triangle into six equal spherical right triangles, thereby dividing the entire spherical ball surfaces into 48 equal spherical right triangles.dimples are arranged on every two adjoining spherical right triangles such that the dimples are in axial symmetry with respect to the common side of the two adjoining spherical right triangles and the dimples do not intersect the great circles.

Abstract: Solid golf balls comprising a solid core and a cover which exhibit improved flying performance, controllability, repulsion, fatigue resistance, and hitting feel. The solid core is formed from a composition comprising a polybutadiene containing at least 40% of cis-1,4-bond and an unsaturated carboxylic acid and/or a metal salt thereof for causing crosslinking of the polybutadiene and having a deformation of 1.5 to 3.5 mm under a constant load of 100 kg, and the difference in hardness between the center and the periphery of said solid core is less than 10%; and the cover is formed from a thermoplastic resin composition comprising 97 to 65% by weight of an ionomer resin and 3 to 35% by weight of a flexible resin selected from the group consisting of polyester elastomers, polyamide propylene-butadiene copolymers, 1,2 polybutadienes, polybutiene-1, and sytrene-butadiene block copolymers and mixtures thereof, and having a resilience of at least 35%, and having a flexural modulus of 1,500 to 4,500 kg/cm.sup.

Abstract: Solid golf balls are formed from a molding composition comprising (1) a polybutadiene blend of (A) a polybutadiene synthesized using a nickel and/or cobalt base catalyst and having a Mooney viscosity of 70 to 100 with (B) less than 50 parts by weight of a polybutadiene synthesized using a lanthanide rare earth element base catalyst and having a Mooney viscosity of 30 to 90 or (C) 20 to 80 parts by weight of a polybutadiene synthesized using a nickel and/or cobalt base catalyst and having a Mooney viscosity of 20 to 50, the polybutadienes containing at least 40% of cis-1,4 bond, (2) a crosslinking agent such as acrylic and methacrylic acid, (3) an inorganic filler, and (4) an organic peroxide.