Opto Sigma

• High stability for mounting laser cavity mirrors
• For one and two inch diameter mirrors
• Adapters for other common sizes
• Gimballed mounting rotates about mirror surface
• Dual fine/ultra-fine angular adjustment
• Sensitivity <10arcsec

These mirror mounts maintain a low center of gravity and have a secure method for attachment to a base. Internal construction introduces hardly any instability so that mirrors will remain securely in place once set. Both intra-cavity and external mirrors will benefit from this ultra-stable form of mounting. The mounts are supplied for one inch and two inch diameter mirrors but adapters may be used for other mirror sizes. Mirrors are secured in place from the rear of the mount using a retaining ring.

The Gimballed mount permits angular movement of the mirror about its surface thereby eliminating any beam run-out during adjustment. There are two degrees of freedom about azimuthal and elevational axes and each is driven by a dual speed differential micrometer. This permits the mirror to be set up within about 5arcseconds. For convenience, the outer body has two flat bases so that the micrometers can be arranged to be either on the right or left of the mirror. The base plate has mounting holes for either 1/4-20 or M6 screws.