JPS6434730A - Selected light transmitting organic high molecular weight formed body - Google Patents

Abstract

PURPOSE:To enable the reflection of the light in a very narrow wavelength band to be prevented by keeping the refractive index for light of titanium oxide in at least 2.2 and less than 2.4. CONSTITUTION:This selected light transmitting organic high molecular weight formed body is composed of the austenite stainless layer of the thickness of at least 10Angstrom and at most 80Angstrom laminated on an organic high molecular weight formed body transparent for visible light, a titanium oxide layer having the thickness of at least 500Angstrom and at most 550Angstrom and the light refractive index of at least 2.2 and less than 2.4, the silver layer of the thickness of at least 100Angstrom and at most 200Angstrom , the metallic titanium layer of the thickness of at least 5Angstrom and at most 50Angstrom and the titanium oxide layer having the thickness of at least 900Angstrom and at most 1000Angstrom and the light-refractive index of at least 2.2 and less than 2.4. In the spectral properties of the transmittance of near infrared ray, a transmittance in a certain wave length (a) of at least 1.3mum and at most 1.7mum is higher by 10% than the transmittance in the wavelength of (a+0.3mum) and (a-0.3mum). Consequently, the light in the wavelength band having 0.55mum wavelength at its center in which human feels best brightness, is caused to pass with high transmittance, and the light beam of the wavelength except said light is rejected at high reflective index. Thus, such organic high molecular weight formed body may be obtained.