Optical guide and image forming apparatus using the same

An image forming apparatus comprising an eraser which initializes a surface potential of a photoreceptor medium, and an auxiliary transfer device, which facilitates transfer of a toner image by radiating light on a surface of the photoreceptor medium,

• wherein the eraser and the auxiliary transfer device comprise:
• a light source to emit light;
• and
• an optical guide on a side of the apparatus having the light source, which guides the light emitted from the light source and incident therethrough in a lengthwise direction, makes uniform the light in an effective width range of the lengthwise direction and outputs the uniform light,
• wherein the optical guide comprises:
• a first surface to receive the incident light, comprising a plurality of reflective slopes to reflect and make uniform the incident light, each having a stripe shape and forming a varying angle with respect to the lengthwise direction, and
• a second surface which is opposite to the first surface and is an output surface from which the light reflected from the reflective slopes is output.

An image forming apparatus comprising an eraser which initializes a surface potential of a photoreceptor medium, and an auxiliary transfer device, which facilitates transfer of a toner image by radiating light on a surface of the photoreceptor medium, wherein the eraser and the auxiliary transfer device each comprises:

• a light source to emit light;
• and
• an optical guide on a side of the apparatus having the light source, which guides the light emitted from the light source and incident therethrough in a lengthwise direction, makes uniform the light in an effective width range of the lengthwise direction and outputs the uniform light,
• wherein the optical guide comprises:
• a first surface to receive the incident light, comprising a plurality of reflective slopes to reflect and make uniform the incident light, each having a stripe shape and forming a varying angle with respect to the lengthwise direction, and
• a second surface which is opposite to the first surface and is an output surface from which the light reflected from the reflective slopes is output.

An image forming apparatus, comprising:

• a photoreceptor;
• and
• an eraser to initialize a surface potential of the photoreceptor, the eraser comprising an optical guide comprising:
• a first surface to receive incident light, comprising a plurality of reflective slopes to reflect and make uniform the incident light, and a second surface, opposite the first surface, to output the light reflected from the reflective slopes.

An image forming apparatus, comprising:

• a photoreceptor;
• and
• a transfer device to radiate light on a surface of the photoreceptor, the transfer device comprising an optical guide comprising:
• a first surface to receive incident light, comprising a plurality of reflective slopes to reflect and make uniform the incident light, and
• a second surface, opposite the first surface, to output the light reflected from the reflective slopes.