DE91883C - - Google Patents
Info
- Publication number
- DE91883C DE91883C DENDAT91883D DE91883DA DE91883C DE 91883 C DE91883 C DE 91883C DE NDAT91883 D DENDAT91883 D DE NDAT91883D DE 91883D A DE91883D A DE 91883DA DE 91883 C DE91883 C DE 91883C
- Authority
- DE
- Germany
- Prior art keywords
- lens
- halves
- hand
- spherical
- perfect
- 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.)
- Active
Links
- 238000012937 correction Methods 0.000 claims description 5
- 201000009310 astigmatism Diseases 0.000 claims description 3
- 230000005499 meniscus Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 description 3
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 -
- G02B9/04—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having two components only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE91883C true DE91883C (https=) |
Family
ID=363467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT91883D Active DE91883C (https=) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE91883C (https=) |
-
0
- DE DENDAT91883D patent/DE91883C/de active Active
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