Gas discharge laser
AssigneeU.S. Philips Corporation
InventorsPieter C. Bloot, Johannes H. K. C. van Kleef
Life of this patent
Estimating the term…
Abstract
A gas discharge laser includes a laser capillary in a tubular glass envelope which has at its two ends reflectors having optical axes which coincide with the axis of the laser capillary and which together constitute a laser resonator. A Brewster window is mounted in the envelope immediately before one of the reflectors. The Brewster window is placed in a holder manufactured from metal sheet material so that one side thereof is pressed against three regions of engagement on the holder whereby no mechanical stresses occur in the Brewster window. These stresses would otherwise disturb the polarizing effect of the Brewster window. This holder can be manufactured with small tolerances and in a very cheap manner.
Claims13
A gas discharge laser comprising a tubular glass envelope containing a gas including an active lasing medium and a laser capillary having a longitudinal axis, which envelope comprises two electrodes for establishing an electric discharge in the gas and at each end a reflector having an optical axis, the optical axes of said reflectors being coincident with the axis of the laser capillary, said reflectors together with the laser capillary constituting a resonant cavity, a Brewster window mounted in a holder in said envelope located in front of one of the reflectors, the holder being made of metal sheet material formed so that one major surface of the Brewster window is resiliently urged against three regions of engagement on the holder.
A gas discharge laser comprising:
- an elongate envelope containing a gas with an active lasing medium, a laser capillary tube in said envelope having a longitudinal axis, at least two electrodes in the envelope to establish an electric discharge in said gas, first and second reflectors at opposite ends of the envelope each having an optical axis that coincides with the axis of the laser capillary tube to define therewith an optical resonator, a holder made of a resilient sheet metal mounted in front of one of said reflectors and having three non-contiguous regions of engagement, and a Brewster window mounted in said holder so that a part of one major surface thereof is resiliently urged against said three regions of engagement of the holder.
Dependencies are inferred from the claim text.