| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical system that is insensitive to a change in conditions of an ambient environment. SOLUTION: The refractive optical system may be a collimator, focusing optical system, reducer, or expander and includes an entrance optical element (25), an exit optical element (35), and a volume (45) disposed between the entrance and exit optical elements (25 and 35). The volume (45) is configured to have an index of refraction that is insensitive to changes in atmospheric conditions of the ambient environment. A surface of curvature of an input surface of the entrance optical element (25) is parallel to a wavefront curvature of an input light beam and an output surface of the exit optical element 35 is parallel to a wavefront curvature of an exit light beam. Accordingly, the wavefront curvature of the exit light beam is insensitive to the ambient environment permitting the production and operation environments to change without a change to the performance of the optical system. COPYRIGHT: (C)2008,JPO&INPIT
|
