LAMP REPLACEMENT DEVICE SWIVELED BY PIVOT AND OVERHEAD PROJECTOR PROVIDED WITH COLOR ADJUSTMENT

摘要

PURPOSE: To provide an overhead projector by which a lamp under usage is cooled effectively. CONSTITUTION: An overhead projector is provided with two lamps 30 and 32 which are arranged in a certain angle relation in a frame 28, by which a lamp which is not used, is positioned at the outside of an air flow, and the lamp being used is positioned in the air flow. An axial point 34 coincides with a master screw 36 which enables the axial movement of the lamps 30 and 32, to be executed in addition to the rotation movement for correcting undesirable color influence.