Abstract: A peeking prevention system includes: a display device having a display plane from which to emit linearly polarized light; a partition to delimit from the surroundings a space in which displaying is to be provided by the display device, the partition having a light-transmitting portion through which the inside of the space is viewable; and an optical stack placeable in opposing relationship with the display plane of the display device. The light-transmitting portion includes a transparent substrate and a first polarizing layer, the first polarizing layer having a first absorption axis that is parallel to a first direction. The optical stack includes a second polarizing layer having a second absorption axis that is parallel to a second direction, the second direction being orthogonal to the first direction, and a ½ wave plate at a side of the second polarizing layer facing the display plane.

Abstract: A connector (50) includes a tubular member (52) and a base tube (58). A light-guiding tube (60) is drawn out from the base tube (58) toward the opposite side to the tubular member (52). An adapter (1) includes: a first connecting portion (10) that can be connected to and disconnected from a light source device (70); a second connecting portion (20) that can be connected to and disconnected from the connector (50); and a light-guiding member (30) that guides light emitted from the light source device (70) to a proximal end surface (61) of the tube (60).

Abstract: A trim guide device for slitter-scorers in which a corrugated board sheet transferred on guide tables is slit by rotary elements disposed above and below the corrugated board sheet, to be thereafter scored by similar rotary elements, comprising air ejection means disposed under the lower surface of those portion of said guide tables which are on the upstream side with respect to the flow of the corrugated board sheet of said rotary elements, and adapted to eject air toward the downstream side of the flow of the corrugated board sheet. The trims at both ends of the corrugated board sheet which has been subjected to slitting by means of said rotary elements are correctly guided by currents of air ejected from the air ejection means into the trim chute disposed on the downstream side of the guide table.