| 摘要 |
An optical mounting assembly, such as a lens cell assembly, method for making a lens cell assembly, and method for supporting a lens in the lens cell assembly are provided to kinematically mount an optical element to an optical holder. The optical mounting assembly includes an optical element having a plurality of mounting pads distributed around an outer circumference of the optical element, and an optical holder having a corresponding plurality of clamping brackets distributed around an inner circumference of the optical holder. The optical holder supports or constrains movement of the optical element at points of contact between the plurality of mounting pads and the corresponding plurality of clamping brackets both in a normal direction parallel to the optical axis of the assembly and in a tangential direction of the corresponding mounting pad. When the optical element has three mounting pads and the optical holder constrains the optical element at corresponding three clamping brackets, the optical element is constrained in six degrees of freedom, three in the normal direction and another three in the tangential direction at the corresponding mounting pads. The optical mounting assembly of this invention can be used in combination with a projection lens assembly in a semiconductor wafer manufacturing process.
|
