Transparent screen for 3D display and 3D display system

A transparent screen for 3D display comprising:

• a plurality of dots, each of the dots having wavelength selectivity and being formed of a liquid crystal material having a cholesteric structure;
• and
• a transparent substrate having the plurality of dots formed on the surface thereof,
• wherein the cholesteric structure gives a striped pattern of bright parts and dark parts in a cross-sectional view of the dot observed by a scanning electron microscope,
• the dot includes a portion having a height that increases continuously to the maximum height in a direction extending from the edge toward the center of the dot,
• in the portion, the angle formed by the normal line to a line that is formed by a first dark part as counted from the surface of the dot and the surface of the dot is in the range of 70° to 90°,
• right-handed circularly polarized light and left-handed circularly polarized light are reflected by the plurality of dots,
• the plurality of dots include dots that reflect right-handed circularly polarized light and dots that reflect left-handed circularly polarized light,
• a first transparent substrate having the dot that reflects the right-handed circularly polarized light formed thereon and a second transparent substrate having the dot that reflects the left-handed circularly polarized light formed thereon are provided, and
• the first transparent substrate having the dot that reflects the right-handed circularly polarized light formed thereon and the second transparent substrate having the dot that reflects the left-handed circularly polarized light formed thereon are laminated.