The present invention is directed to a method, apparatus, system, or computer program product that allows a user to choose one or more print options within a browser environment in order to conserve the consumption of physical resources, such as paper and printer ink, by modifying the content of a document. When an input revel detection circuit 14 detects that an electrical signal outputted from pin photo-diode 13 exceeds a predetermined level, a transmittivity of an EA device 11 is dropped through an EA control circuit 12, and an externally supplied optical input signal is inputted through the EA device 11 to the pin photo-diode 13. This asymmetry extends beyond the grip portion and includes at least a portion of the trigger guard and a portion of the magazine securing clip. Maintaining the processes gases within the cell protects the sample chamber and column from contact with the gases. In this way, the optical apparatus is reduced in thickness, and can be used in a cam era, a microscope, etc. 0 mm, protruding widths T1 and T2 of the peripheral protrusions of the first and second rollers are set to 0.