Optical scanning system for scanning object with light beam and displaying apparatus

An electromagnetic radiation beam scanning system comprising first and second beam-narrowing devices each of which includes a light modulation layer showing an electro-optic effect;

• first and second electrodes sandwiching said light modulation layer, said first electrode having a transparent section and a pair of terminal sections placed at end portions of said transparent section, an impedance of each of said pair of terminal sections being much lower than an impedance of said transparent section;
• first and second polarizers sandwiching said light modulation layer;
• first power source means for applying a first voltage to said pair of terminal sections;
• and second power source means for applying a second voltage to said second electrode, said light modulation layer having an elongated region in which an effective voltage for the electro-optic effect becomes zero in response to application of said voltages to said pair of terminal sections and second electrode due to said first and second power source means;
• wherein said light modulation layer combined with said polarizers produce a narrowed beam when a light beam is incident thereon, and said first and second beam-narrowing devices are overlapping so that said elongated light-transmission regions intersect each other.

An electromagnetic radiation beam scanning system comprising:

• first and second beam-narrowing devices each of which includes a light modulation layer showing an electro-optic effect, first and second electrodes sandwiching said light modulation layer, said first electrode having a transparent section and a pair of terminal sections placed at end portions of said transparent section, an impedance of each of said sari of terminal sections being much lower than an impedance of said transparent section, and said beam-narrow device further including first and second polarizers sandwiching said light modulation layer;
• first power source means for applying a first voltage to said pair of terminal sections and second power source means for applying a second voltage to said second electrode, said light modulation layer having an elongated region in which an effective voltage for the electro-optic effect becomes zero in response to application of said voltages to said pair of terminal sections and second electrode due to said power source means thereby causing said light modulation layer, combined with said polarizers, to produce a narrowed beam when an electromagnetic radiation beam is incident thereon, said first and second beam-narrowing devices overlapping each other so that said elongated light-transmission regions intersect each other;
• and
• light source means for emitting the electromagnetic radiation beam toward said optical scanning system, said electromagnetic radiation beam from said light source means being modulated in accordance with a displaying signal.

An electromagnetic radiation beam scanning system comprising:

• a light modulation layer showing an electro-optic effect;
• first and second electrodes disposed to sandwich said light modulation layer, said first electrode having a transparent section and a pair of terminal sections placed at end portions of said transparent section, an impedance of each of said pair of terminal sections being much lower than an impedance of said transparent section;
• first and second polarizers sandwiching said light modulation layer;
• first power source means for applying a first voltage to said pair of terminal sections;
• and second power source means for applying a second voltage to said second electrode, said scanning system further comprising a mask having a slit-like light transmission region whose longitudinal axis is perpendicular to the elongated light-transmission region of said light modulation layer so s to form a spotting light beam from an electromagnetic radiation beam incident ton said light modulation layer.

A displaying apparatus comprising:

• an optical scanning system includes a light modulation layer showing an electro-optic effect and first and second electrodes disposed to sandwich said light modulation layers, first and second polarizers sandwiching said light modulation layer, at least one of said light modulation layer and said first and second electrodes having a belt-like configuration, said light modulation layer combined with said polarizers forming an elongated light-transmission region in response o application of voltages to said first and second electrodes;
• light source means for emitting an electromagnetic radiation beam which is modulated in accordance with an indication signal including indication information;
• and
• photo-photo converting means on which image information is written by the electromagnetic radiation beam from said optical scanning system, said photo-photo converting means comprising at least a photoconductive layer and a light modulation layer.

A displaying apparatus comprising:

• an optical scanning system including a light modulation layer showing an electro-optic effect and first and second electrodes disposed to sandwich said light modulation layer, first and second polarizers sandwiching said light modulation layer, said light modulation layer combined with said polarizers forming an elongated light-transmission region in response to application of voltages to said first and second electrodes, said scanning system further comprising a mask having a slit-like light transmission region whose longitudinal axis is perpendicular to the elongated light transmission region of said light modulation layer so as to form a spotting light beam from an electromagnetic radiation beam incident on said light modulation layer;
• light source means for emitting an electromagnetic radiation beam which is modulated in accordance with a displaying signal including indication information;
• and
• photo-photo converting means on which image information is written by the electromagnetic radiation beam from said optical scanning system, said photo-photo converting means comprising at least a photoconductive layer and a light modulation layer.