Patent ID: 7997740

Claim:
An integrator unit for integrating an incoming light beam for a uniform distribution of illumination, said integrator unit comprising: a rod integrator, an inner cylinder for fixedly holding said rod integrator, and an outer cylinder for receiving said inner cylinder coaxially therein for axial slide movement; and further comprising engaging means provided on a cylinder shell wall of said inner cylinder and a radial access bore formed in a cylinder shell wall of said outer cylinder in which an axial position adjusting tool is fitted for rotation, said axial position adjusting tool having engaging means in a position off center from an axis of rotation of said axial position adjusting tool, wherein, when said axial position adjusting tool is inserted in said radial access bore to bring said engaging means thereof into engagement with said engaging means of said inner cylinder and turned in said access, said inner cylinder is axially slid back and forth through said engagement.