US4064466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linearly polarizing internal mirror type gas laser tube
Assignee: NEC Corp
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Filing: 1976-10-19
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Granted: 1977-12-20
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Expires: 1996-10-19
Abstract
Abstract A gas laser tube includes a metal supporting body installed at one end of the laser tube. A seal casing is secured to the supporting body, and accommodates at least one cylindrical holding body having one end cut to a Brewster angle, and an optical flat plate installed in close contact with the cut surface of the holding body. A reflecting mirror is secured to an end of the seal casing.
Inventors
- 👤 Fumio Seki
- 👤 Taizo Oikado
- 👤 Keiichi Shintaku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:34
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A linearly polarizing internal mirror type gas laser tube comprising a hollow metal supporting body installed at an end of the gas laser tube; a seal casing secured axially to said hollow metal supporting body; a first hollow cylindrical internal holding body with one end cut to a Brewster angle; an optical flat plate installed in close contact with the end thereof cut to a Brewster angle; and a second hollow cylindrical internal holding body with one end cut to a Brewster angle installed in close contact with said optical flat plate; said seal casing accommodating said first hollow cylindrical internal holding body, said optical flat plate, and said second hollow cylindrical internal holding body; and a reflecting mirror which is a constituent element of an optical resonator securely fitted into said seal casing at the outer end so that said first hollow cylindrical internal holding body, said optical flat plate, and said second hollow cylindrical internal holding body receive a compressive force.
Claim 2
Dependent Claim
163 words
A linearly polarizing internal mirror type gas laser tube comprising a hollow metal supporting body installed at an end of the gas laser tube; a seal casing secured axially to said hollow metal supporting body; a first hollow cylindrical internal holding body with one end cut to a Brewster angle; an optical flat plate installed in close contact with the end thereof cut to a Brewster angle; and a second hollow cylindrical internal holding body with one end cut to a Brewster angle installed in close contact with said optical flat plate; said seal casing accommodating said first hollow cylindrical internal holding body, said optical flat plate, and said second hollow cylindrical internal holding body; and a reflecting mirror which is a constituent element of an optical resonator securely fitted into said seal casing at the outer end so that said first hollow cylindrical internal holding body, said optical flat plate, and said second hollow cylindrical internal holding body receive a compressive force.
Claim 3
Dependent Claim
70 words
The linearly polarizing internal mirror type gas laser tube according to claim 1, in which the length increment of the seal casing along the axis of the laser tube due to thermal expansion is larger than the sum of the axial length increments of said first hollow cylindrical internal holding body, said optical flat plate, said second hollow cylindrical internal holding body, and said reflecting mirror due to thermal expansion.
Claim 4
Dependent Claim
37 words
The linearly polarizing internal mirror type gas laser tube according to claim 2, in which said optical flat plate is a thin, rectangular body, and the portion thereof where a laser beam passes through is optically polished.
Claim 5
Dependent Claim
32 words
The linearly polarizing interal mirror type gas laser tube according to claim 2, in which said hollow metal supporting body has two flange-like portions installed coaxially with a plastically deformable hollow cylinder.
Claim 6
Dependent Claim
31 words
The linearly polarizing internal mirror type gas laser tube according to claim 4, in which said reflecting mirror is fitted in said seal casing and hermetically sealed by low-melting point glass.
Claim 7
Dependent Claim
36 words
The linearly polarizing internal mirror type gas laser tube according to claim 5, in which said seal casing is of 426 alloy, and said first and second hollow cylindrical internal holding bodies are of Kovar alloy.
Claim 8
Dependent Claim
132 words
A linearly polarizing internal mirror type gas laser tube comprising a hollow metal supporting body installed at an end of the gas laser tube; a seal casing secured axially to said hollow metal supporting body; a hollow cylindrical internal holding body with one end cut to a Brewster angle; and an optical flat plate installed in close contact with the end thereof cut to a Brewster angle; said seal casing accommodating said hollow cylindrical internal holding body adjacent to said metal supporting body and said optical flat plate adjacent to said internal holding body; and a reflecting mirror which is a constituent element of an optical resonator securely fitted in the outer end of said seal casing, whereby said cylindrical internal holding body and said optical flat plate receive a compressive force.
Claim 9
Dependent Claim
132 words
A linearly polarizing internal mirror type gas laser tube comprising a hollow metal supporting body installed at an end of the gas laser tube; a seal casing secured axially to said hollow metal supporting body; a hollow cylindrical internal holding body with one end cut to a Brewster angle; and an optical flat plate installed in close contact with the end thereof cut to a Brewster angle; said seal casing accommodating said hollow cylindrical internal holding body adjacent to said metal supporting body and said optical flat plate adjacent to said internal holding body; and a reflecting mirror which is a constituent element of an optical resonator securely fitted in the outer end of said seal casing, whereby said cylindrical internal holding body and said optical flat plate receive a compressive force.
Claim 10
Dependent Claim
129 words
A linearly polarizing internal mirror type gas laser tube comprising a hollow metal supporting body installed at an end of the gas laser tube; a seal casing secured axially to the hollow metal supporting body; and optical flat plate; and a cylindrical internal holding body with one end cut to a Brewster angle; said seal casing accommodating said optical flat plate adjacent to said metal supporting body, said cylindrical internal holding body of which the end is cut to a Brewster angle being in close contact with said optical flat plate; and a reflecting mirror serving as a constituent element of an optical resonator securely fitted in the outer end of said seal casing, whereby said cylindrical internal holding body and said optical plane plate receive a compressive force.
Claim 11
Dependent Claim
129 words
A linearly polarizing internal mirror type gas laser tube comprising a hollow metal supporting body installed at an end of the gas laser tube; a seal casing secured axially to the hollow metal supporting body; and optical flat plate; and a cylindrical internal holding body with one end cut to a Brewster angle; said seal casing accommodating said optical flat plate adjacent to said metal supporting body, said cylindrical internal holding body of which the end is cut to a Brewster angle being in close contact with said optical flat plate; and a reflecting mirror serving as a constituent element of an optical resonator securely fitted in the outer end of said seal casing, whereby said cylindrical internal holding body and said optical plane plate receive a compressive force.
References Cited (Backward Citations)
US3790900A
Cited
US3851275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |