A device for supporting a photovoltaic panel essentially includes a sealed plastic jacket, the plastic jacket forming a lower wall, an upper wall, and four sidewalls, the device including elements for securing a photovoltaic panel to the upper wall of the plastic jacket. For this purpose a window sill is provided with lateral upward extensions and to provide a U-configuration that is held in place by casing elements and. The evaluation data measurement part measures setting time of time response, an overshoot amount, and the number of vibration times. The obtained foamable resin composition is shaped into a sheet. The image splitter disposed above or below the image display causes image data, which is generated after the light is transmitted through the image display, to emit toward two or more than two view directions.