Patent ID: 7175923
Filing Date: 2007-02-13
Classification: C09K,G02B

Abstract:
1. An optical instrument having a optical system that includes an ocular lens and a reticle located in the optical system, wherein: the reticle comprises a reticle base wherein said reticle base includes a sight, a phosphorescence pigment is applied to a surface of the sight facing the ocular lens, wherein the phosphorescence pigment is applied to an inside area that is located further inside than an edge or periphery, apart from the periphery on the surface of the sight of the reticle base, light irradiated from outside through the ocular lens excites the phosphorescence pigment of the reticle, the phosphorescence pigment contains at least one of a phosphor selected from SrAl the phosphorescence pigment has a particle diameter that is no smaller than 1.5 μm and no greater than 10 μm at D