Claims
- 1. A gas laser oscillator comprising:(a) discharge tubes disposed along the optical axis of laser beam for forming a discharge space inside, (b) a fully reflective mirror disposed toward one opening of said discharge space for composing a terminal mirror, (c) a partially reflective mirror disposed toward other opening of said discharge space for composing an output mirror, (d) a first flange for holding said fully reflective mirror, (e) a second flange for holding said partially reflective mirror, and (f) a support element, being a member for keeping parallelism between said fully reflective mirror and said partially reflective mirror by coupling said first flange and said second flange, and having a spiral medium passage for passing cooling medium disposed inside thereof.
- 2. A gas laser oscillator of claim 1, wherein plural systems of spiral cooling medium passages are formed in said support element.
Priority Claims (3)
Number |
Date |
Country |
Kind |
9-203669 |
Jul 1997 |
JP |
|
9-210669 |
Aug 1997 |
JP |
|
P9-210672 |
Aug 1997 |
JP |
|
Parent Case Info
This is a divisional application of Ser. No. 09/120,886, filed Jul. 23, 1998.
US Referenced Citations (4)
Foreign Referenced Citations (7)
Number |
Date |
Country |
0 492 340 |
Jul 1992 |
EP |
2.073.481 |
Oct 1997 |
FR |
2 020 890 |
Nov 1979 |
GB |
2117558 |
Oct 1983 |
GB |
56-90588 |
Jul 1981 |
JP |
61-097983 |
May 1986 |
JP |
1-057694 |
Mar 1989 |
JP |