ES299198A1 - Simplified disposition of visual observation (Machine-translation by Google Translate, not legally binding) - Google Patents
Simplified disposition of visual observation (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES299198A1 ES299198A1 ES0299198A ES299198A ES299198A1 ES 299198 A1 ES299198 A1 ES 299198A1 ES 0299198 A ES0299198 A ES 0299198A ES 299198 A ES299198 A ES 299198A ES 299198 A1 ES299198 A1 ES 299198A1
- Authority
- ES
- Spain
- Prior art keywords
- translation
- machine
- legally binding
- google translate
- simplified
- 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
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
- E06B7/30—Peep-holes; Devices for speaking through; Doors having windows
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/04—Eyepieces; Magnifying glasses affording a wide-angle view, e.g. through a spy-hole
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lenses (AREA)
Abstract
Simplified observation arrangement vidual, characterized by the combination of two simple lenses integrated by a diverging lens and a converging eyepiece, which have reduced diameters of the order of 6.5 mm being the objective constituted by a biconcave lens, whose ratio of radii of curvature front and rear must be between 0.9 and 2, the thickness of the center being between 0.3 mm and 0.6 mm and the refractive index between 1.49 and 1.53, and the eyepiece consisting of a planoconvex lens, the plane being directed, in this case towards the incident light or any other convergent element such that the radius of curvature towards the incident light is greater or at least equal to the radius of curvature of the other face, the index being included of refraction between 1.49 and 1.53, and including the ratio of the focal distances of the two elements: objective and ocular, between 0.32 and 0.48. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8823A FR1378584A (en) | 1963-12-12 | 1963-12-12 | Simplified optical viewer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES299198A1 true ES299198A1 (en) | 1964-09-01 |
Family
ID=45788234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0299198A Expired ES299198A1 (en) | 1963-12-12 | 1964-04-25 | Simplified disposition of visual observation (Machine-translation by Google Translate, not legally binding) |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES299198A1 (en) |
| FR (1) | FR1378584A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4175824A (en) * | 1977-09-13 | 1979-11-27 | Daley Nicholas G | Door viewer with barrel flange and mating lens recess |
| US8745923B2 (en) * | 2011-11-14 | 2014-06-10 | Kamran Khoshkish | Door viewer security cover |
| US11498396B1 (en) * | 2018-12-24 | 2022-11-15 | Robert N. Justice | Viewing port |
-
1963
- 1963-12-12 FR FR8823A patent/FR1378584A/en not_active Expired
-
1964
- 1964-04-25 ES ES0299198A patent/ES299198A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1378584A (en) | 1964-11-13 |
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