Abstract: An optical lens has an optical function portion having an optical function, and a flange portion formed around the optical function portion. The flange portion has a cut section, which is formed by cutting a gate portion, on a side surface thereof. In a case where the following are viewed from a direction of the optical axis of the optical lens, a concave portion is provided in at least a portion of a region in which the flange portion overlaps with a region obtained by straight lines connecting together an optical axis center of the optical lens and both ends of the cut section, and the concave portion is provided on both surfaces of the flange portion.

Abstract: The optical lens 10 having an optical function portion 12 having optical functions; and a flange portion 14 formed around the optical function portion 12. The flange portion 14 has, on a side surface thereof, a cut section 42 which is formed by cutting a gate portion 16. In a case where the following are viewed from the optical axis direction of the optical lens 10, a thinnest portion 18 in a region 44 surrounded by lines L1 and L2, which respectively connect both ends 42a and 42b of the cut section 42 to the optical axis center O of the optical lens 10, and a line L3, which connects both ends 42a and 42b, is present in the optical function portion 12. The flange portion 14 has a concave portion 40 outside the region 44.

Abstract: An optical lens 11, which has a lens section with a refractive power, has concave marks 33, 35, 37, and 39 which are formed to be recessed on a surface of the lens section, in an effective optical lens surface which contributes to image forming of the lens section. A width of each of these concave marks 33, 35, 37, and 39 is equal to or greater than 0.05 ?m and equal to or less than 14 ?m, and a depth of recession of each concave mark is equal to or greater than 0.05 ?m and equal to or less than 5 ?m.

Abstract: The optical lens 10 includes: an optical function portion 12 having optical functions; and a flange portion 14 formed around the optical function portion 12. The flange portion 14 has, on a side surface thereof, a cut section 42 which is formed by cutting a gate portion 16. In a case where the following are viewed from the optical axis direction of the optical lens 10, a thinnest portion 18 in a region 44 surrounded by lines L1 and L2, which respectively connect both ends 42a and 42b of the cut section 42 to the optical axis center O of the optical lens 10, and a line L3, which connects both ends 42a and 42b, is present in the optical function portion 12. The flange portion 14 has a concave portion 40 outside the region 44.

Abstract: An optical lens has an optical function portion having an optical function, and a flange portion formed around the optical function portion. The flange portion has a cut section, which is formed by cutting a gate portion, on a side surface thereof. In a case where the following are viewed from a direction of the optical axis of the optical lens, a concave portion is provided in at least a portion of a region in which the flange portion overlaps with a region obtained by straight lines connecting together an optical axis center of the optical lens and both ends of the cut section, and the concave portion is provided on both surfaces of the flange portion.

Abstract: An optical lens 11, which has a lens section with a refractive power, has concave marks 33, 35, 37, and 39 which are formed to be recessed on a surface of the lens section, in an effective optical lens surface which contributes to image forming of the lens section. A width of each of these concave marks 33, 35, 37, and 39 is equal to or greater than 0.05 ?m and equal to or less than 14 ?m, and a depth of recession of each concave mark is equal to or greater than 0.05 ?m and equal to or less than 5 ?m.

Abstract: A resin material measuring method which obtains a prescribed amount of a resin material by measuring liquid resin material, the resin material measuring method including: charging the resin material having a fluidity into an internal space of a cylinder using a cylinder-piston mechanism which includes: the cylinder having a discharge aperture at one end and the internal space being constant in cross-sectional area; and a piston which is inserted in the internal space; determining a necessary movement stroke length of the piston corresponding to the resin material of a prescribed volume according to a relationship between the volume of the resin material and the cross-sectional area and the movement stroke length; discharging the resin material from the cylinder through the discharge aperture by moving the piston by the determined movement stroke length; and cutting the discharged resin material from the resin material located inside the cylinder.