| 摘要 |
PURPOSE:To obtain an LED array head in which printing of high quality is achieved on an LED chip so that the optical output at every dot by each LED is substantially uniform by providing an optical output regulating member for uniformizing the optical output on the upper surface of a light emitting unit of each chip. CONSTITUTION:A plurality of LED chips 11 having many light emitting units are disposed linearly on the upper surface of an insulating substrate 1, and an optical output regulating member 2 for uniformizing the optical output is disposed on the upper surface of the light emitting unit of each chip 11 in an LED array head for irradiating a light irradiated from each light emitting unit to a photosensitive element. For example, the member 2 is of light reducing coating layers having different transparencies at every light emitting unit and different transparencies set corresponding to the intensity of the light irradiating intensity of each LED 12. Thus, even if the intensities of the lights irradiated from the front surfaces of the LEDs 12 are individual, since the transparencies are reduced in response to the intensities of the lights irradiated from the LEDs 12. Accordingly, the light which passes the member 2 has constant intensity. |
