FR1029431A - Filtre atténuateur de lumière - Google Patents
Filtre atténuateur de lumièreInfo
- Publication number
- FR1029431A FR1029431A FR1029431DA FR1029431A FR 1029431 A FR1029431 A FR 1029431A FR 1029431D A FR1029431D A FR 1029431DA FR 1029431 A FR1029431 A FR 1029431A
- Authority
- FR
- France
- Prior art keywords
- light attenuating
- attenuating filter
- filter
- light
- attenuating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/26—Reflecting filters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1029431T | 1950-12-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1029431A true FR1029431A (fr) | 1953-06-02 |
Family
ID=9581849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1029431D Expired FR1029431A (fr) | 1950-12-12 | 1950-12-12 | Filtre atténuateur de lumière |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1029431A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3042561A (en) * | 1958-02-19 | 1962-07-03 | Iwashita Wasaku | Transparent light and heat insulating window panes and shields |
-
1950
- 1950-12-12 FR FR1029431D patent/FR1029431A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3042561A (en) * | 1958-02-19 | 1962-07-03 | Iwashita Wasaku | Transparent light and heat insulating window panes and shields |
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