GB377036A - Improvements in photographic lenses - Google Patents
Improvements in photographic lensesInfo
- Publication number
- GB377036A GB377036A GB2918131A GB2918131A GB377036A GB 377036 A GB377036 A GB 377036A GB 2918131 A GB2918131 A GB 2918131A GB 2918131 A GB2918131 A GB 2918131A GB 377036 A GB377036 A GB 377036A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- refractive index
- power
- photographic lenses
- lenses
- 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
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/02—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having one + component only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
377,036. Lenses. LEE, H. W. and KAPELLA, Ltd., 104, Stoughton Street, Leicester. Oct. 21, 1931, Nos. 29181/31, 30563/31, and 1105/32. Drawings to Specification. [Class 97 (i).] In a photographic objective comprising a simple meniscus lens used in conjunction with a diaphragm between it and the image plane, the ratio of the power of the first surface of the lens to the power of the lens is greater than the square of the refractive index of the glass for a wave-length of 3,500 A.U., but does not exceed 3. The refractive index for the sodium line is not less than 1À5. Numerical data are given.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2918131A GB377036A (en) | 1931-10-21 | 1931-10-21 | Improvements in photographic lenses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2918131A GB377036A (en) | 1931-10-21 | 1931-10-21 | Improvements in photographic lenses |
Publications (1)
Publication Number | Publication Date |
---|---|
GB377036A true GB377036A (en) | 1932-07-21 |
Family
ID=10287434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2918131A Expired GB377036A (en) | 1931-10-21 | 1931-10-21 | Improvements in photographic lenses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB377036A (en) |
-
1931
- 1931-10-21 GB GB2918131A patent/GB377036A/en not_active Expired
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