OPTISK KAVITET FOR LASER

摘要

The optical cavity in a laser system is defined by mirrors held in a predetermined spacial relationship that is maintained in spite of thermal gradients and temperature variations in the parts of the laser system which hold and support the mirrors. The relative spacial relationship of the mirrors to each other is maintained by a plurality of spacer rods which are made of a material which has relatively low thermal expansion and these spacer rods connect directly to the plates or blocks that carry the mirrors. Shields or enclosures for these bodies are made of a material which has a relatively high thermal conductivity and which does not in any way fix or limit the spacial relationship of the mirrors and so the temperature of the spacer rods remains sufficiently uniform that the thermal expansion thereof does not cause an excessive deviation in the spacial relationship of the mirrors in spite of changing thermal conditions and gradients throughout and about the laser system.