Patent ID: 8749720

Claim:
An exposing device comprising: a first light-emitting diode that emits first light; a first polarizing plate that polarizes the first light; a second light-emitting diode that emits second light; a second polarizing plate that polarizes the second light in a direction that is perpendicular to a polarization direction of the first polarizing plate; and a liquid crystal panel that is disposed between the first and second light-emitting diodes and a photoreceptor body to be exposed to the second light, the liquid crystal panel configured to act as a convex refractive lens due to an orientation variation that is caused by illumination with the first light, the liquid crystal panel being configured to focus the second light on the photoreceptor body via the convex refractivelens, and the liquid crystal panel being further configured to transmit polarized light having a polarization direction that is same as the polarization direction of the second polarizing plate.