FR345692A - Lenticular-parabolic-annular optical system - Google Patents
Lenticular-parabolic-annular optical systemInfo
- Publication number
- FR345692A FR345692A FR345692A FR345692DA FR345692A FR 345692 A FR345692 A FR 345692A FR 345692 A FR345692 A FR 345692A FR 345692D A FR345692D A FR 345692DA FR 345692 A FR345692 A FR 345692A
- Authority
- FR
- France
- Prior art keywords
- lenticular
- parabolic
- optical system
- annular optical
- annular
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR345692T | 1904-08-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR345692A true FR345692A (en) | 1904-12-08 |
Family
ID=1394466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR345692A Expired FR345692A (en) | 1904-08-19 | 1904-08-19 | Lenticular-parabolic-annular optical system |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR345692A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4905034A (en) * | 1986-03-25 | 1990-02-27 | Asahi Kogaku Kogyo Kabushiki Kaisha | Automatic focusing projector |
-
1904
- 1904-08-19 FR FR345692A patent/FR345692A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4905034A (en) * | 1986-03-25 | 1990-02-27 | Asahi Kogaku Kogyo Kabushiki Kaisha | Automatic focusing projector |
US4949115A (en) * | 1986-03-25 | 1990-08-14 | Asahi Kogaku Kogyo K.K. | Automatic focusing projector |
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