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US4064402A
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Method and apparatus for suppressing the visible radiation emitted by a source of infra-red radiation
Assignee: Individual
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Filing: 1976-05-10
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Granted: 1977-12-20
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Expires: 1996-05-10
Abstract
Abstract Sources of infra-red radiation have the property of emitting besides infra-red radiation also visible radiation which is considered to be disturbing in particular applications; in order to avoid it the visible portion of radiation is absorbed by means of a gas or a gas mixture so that only the infra-red radiation emerges from the source of infra-red radiation.
Inventors
- 👤 Mario Posnansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:48
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/202
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
62 words
Apparatus for suppressing the visible portion of the radiation emitted by a source of infra-red radiation comprising a glass tube enclosing said source, at least one transparent envelope surrounding and spaced from said source and a gas or a mixture of gases having an absorption spectrum in the visible wave band enclosed in the space between said glass tube and said envelope.
Claim 2
Dependent Claim
62 words
Apparatus for suppressing the visible portion of the radiation emitted by a source of infra-red radiation comprising a glass tube enclosing said source, at least one transparent envelope surrounding and spaced from said source and a gas or a mixture of gases having an absorption spectrum in the visible wave band enclosed in the space between said glass tube and said envelope.
Claim 3
Dependent Claim
18 words
Apparatus in accordance with claim 1, wherein said envelope is tubular and is welded to said glass tube.
Claim 4
Dependent Claim
12 words
Apparatus in accordance with claim 2, wherein said enclosed gas contains iodine.
Claim 5
Dependent Claim
68 words
Apparatus for suppressing the visible portion of the radiation emitted by a source of infra-red radiation, comprising means for surrounding said source at least partially by a gas or a mixture of gases having an absorption spectrum in the visible wave band, said means comprising two panes of glass between which said gas or gases are accommodated, said panes of glass serving as a cover for said source.
Claim 6
Dependent Claim
68 words
Apparatus for suppressing the visible portion of the radiation emitted by a source of infra-red radiation, comprising means for surrounding said source at least partially by a gas or a mixture of gases having an absorption spectrum in the visible wave band, said means comprising two panes of glass between which said gas or gases are accommodated, said panes of glass serving as a cover for said source.
References Cited (Backward Citations)
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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 |