| 摘要 |
A laser is described which includes optical mirror mounting structure providing stable support for the optical mirrors and yet enabling precise and reproducible angular reorientation of the same with respect to the optical axis of the lasing tube. The mounting structure for each of such mirrors includes a pair of generally parallel, rectangular plates, one of which is rigidly associated with the lasing tube and the other one of which is a mount for the mirror. Such plates are adjustably connected together adjacent three corresponding corners to provide orthogonal adjustment of one with respect to the other. Each connection at a corner includes a tuning bolt which is threadably received within one of the plates and bears against the other. It also includes a leaf spring rigidly secured between such plates to provide a compressive force on its associated tuning bolt. Each of such leaf springs is formed by a pair of leaf portions respectively secured to an associated one of the plates and extending generally transversely with respect to the direction of movement of the tuning bolt, which portions defines an expandable joint in the leaf spring enabling the same to lengthen to compensate for changes in the distance between the plates caused by the tuning bolt. A tubular cover is provided at each end of the lasing tube extending therebetween and the optical mirror associated with such end. Each of such tubular covers includes a ball joint permitting angular orientation of the mirror mounting structure with respect to the envelope and, hence, the optical axis.
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