The Reflection And Transmissivity Of Extraordinary Beam At Crystal Surfaces

With the rapid development of technology, a crystal of the various optical device has been increasingly applicated widely, especially in a photovoltaic technology and communication fields. The relevant properties of light transmission in crystals is an important reference factor of modern optical instrument design, as the new functionality crystalline material constantly emerging, the study about the relevant properties of light transmission in crystals is developing in deep. The related parameters of light reflection and transmission on crystals interface effect the choice of the crystal in practical application. It is an important theoretical question in optical instrument for designing and manufacturing fields.In this paper, according to refractivity plane and the boundary relations of the electromagnetic field , based on geometric construction, the relationship double reflection and fresnel reflection of an extraordinary beam atuniaxial crystal and biaxial crystal internal surfaces has been researched.1. Researching the fresnel reflection of the crystal internal surface when an extraordinary beam from a crystal to an isotropic, wherever the optical of the atuniaxial crystal.Using the refractivity plane of the atuniaxial crystal and geometric construction , the double reflection and the refraction at the crystal surface are analyzed, and the positions of the reflection light and the refraction light are achieved. According to the boundary relations of the electromagnetic field and double reflection effect of the crystal,we can get the fresnel formula at the atuniaxial crystal surfaces ,and the formula of the reflectivity and the transmissivity.2. The fresnel reflection of the crystal internal surface is studied,when the incident plane is the optical axis of the biaxial crystal. Using the refractivity plane of the biaxial crystal and geometric construction, for analyzing the reflection and the refraction at the crystal surfaces ,can get the Position of the reflection light and the refraction light. According to the boundary relations of the electromagnetic field and double reflection, for analying fresnel reflection at the crystal internal surface. It can get the fresnel formula and the formula of the reflectivity and the transmissivity.