GB399452A - Improvements in converging achromatic eye-pieces - Google Patents
Improvements in converging achromatic eye-piecesInfo
- Publication number
- GB399452A GB399452A GB17386/33A GB1738633A GB399452A GB 399452 A GB399452 A GB 399452A GB 17386/33 A GB17386/33 A GB 17386/33A GB 1738633 A GB1738633 A GB 1738633A GB 399452 A GB399452 A GB 399452A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- converging
- achromatic
- spherical surface
- eye
- 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
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
399,452. Eyepieces. ZEISS, C., [Firm of], Carl-Zeiss-Strasse, Jena, Germany. June 19, 1933, No. 17386. Convention date, June 22, 1932. [Class 97 (i).] In a converging achromatic eyepiece for a prismatic telescope, one of the lens surfaces is made of non-spherical form such that the marginal thickness of the lens is increased by at least 1/30 of the lens diameter, compared to the thickness of a lens having a spherical surface which touches, and has the same vertex curvature as, the said non-spherical surface. As shown the eyepiece system consists of two components and the front surface of the rear component is of paraboloidal form. A spherical surface having a curvature equal to the vertex curvature of the paraboloid is shown in dotted lines. Constructional data are given.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE399452X | 1932-06-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB399452A true GB399452A (en) | 1933-10-05 |
Family
ID=6397492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17386/33A Expired GB399452A (en) | 1932-06-22 | 1933-06-19 | Improvements in converging achromatic eye-pieces |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB399452A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2930699A1 (en) * | 1978-08-02 | 1980-02-21 | Svenska Thorn Ab | DEVICE FOR PREPARING GAS-DRINKING BEVERAGES |
-
1933
- 1933-06-19 GB GB17386/33A patent/GB399452A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2930699A1 (en) * | 1978-08-02 | 1980-02-21 | Svenska Thorn Ab | DEVICE FOR PREPARING GAS-DRINKING BEVERAGES |
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