A cooling device for a light source in a copying machine.

摘要

The present invention relates to a cooling device for a light source (16, 17) for lighting an original in a copying machine, wherein the generation of heat waving of air in the optical path is prevented by cooling a lamp body (13a, 13b) effectively in order to obviate the deterioration of an optical image.
<??>Light-pervious heat-shield members (18, 19) are disposed spaced apart in an irradiation opening (14) of the lamp body accommodating a light source bulb (17) and a reflector (16) therewithin so as to blow cooling air between these heat-shield members, and at least the member (19) positioned nearest the light source bulb is composed of a heat-ray absorbing glass.
<??>Accordingly, the cooling device discharges the cooling air blown between the heat-shield members out of the lamp body through the chamber (22) accommodating the light source bulb so that it may perform a forced air cooling to the inside of the lamp body in order to prevent waving of the air.