A high refraction film, an anti-reflection film, a protective film for polarizing plate, a polarizing plate and an image display device excellent in weathering resistance are provided. The housing includes a first receiving space for receiving a first card and a second receiving space for receiving a second card and the two receiving spaces are provided with a common insertion opening. This results in courses that are stagnant and hot well rounded. There is provided a secondary seal ring at the first axial end of the valve body member. The BTBT device is configured as an injection device for injecting a first charge onto the floating gate when the BTBT device is biased so that it is in accumulation, to set at least one of the logic levels. The proposed architecture may be used for both parallel and wavelength division multiplexing based optical links with a data rate of 25 Gbs and beyond.