Projection lens manufacturing apparatus, projection lens manufacturing method, projection lens manufactured by the projection lens manufacturing method and projector having the projection lens

摘要

A projection lens (46) has a lens barrel (100) in which group lenses (110) are sequentially disposed and an optical path is set, the lens barrel (100) having position-adjusting holes (122A) on a position orthogonal to an optical axis of a third group lens (113) and being orthogonal with each other. The projection lens manufacturing apparatus has a projection lens holding mechanism (550) for holding the projection lens (46) at the lens-adjusting position; an image light irradiating mechanism (526) which introduces the test pattern image in accordance with a light beam irradiated by a light source (521) onto the projection lens (46); a lens position adjuster (570) which adjusts the position of the third group lens (113) along X-axis and Y-axis while detecting the image light irradiated through the projection lens (46); and a bonding mechanism (580) for bonding the adjusted third group lens (113).