DE287089C - - Google Patents
Info
- Publication number
- DE287089C DE287089C DENDAT287089D DE287089DA DE287089C DE 287089 C DE287089 C DE 287089C DE NDAT287089 D DENDAT287089 D DE NDAT287089D DE 287089D A DE287089D A DE 287089DA DE 287089 C DE287089 C DE 287089C
- Authority
- DE
- Germany
- Prior art keywords
- lens
- focal length
- percent
- spherical
- correction
- 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
- 201000009310 astigmatism Diseases 0.000 description 3
- 241000947840 Alteromonadales Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Publications (1)
Publication Number | Publication Date |
---|---|
DE287089C true DE287089C (ko) | 1915-09-13 |
Family
ID=542342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT287089D Expired DE287089C (ko) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE287089C (ko) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1299901B (de) * | 1961-11-13 | 1969-07-24 | Minnesota Mining & Mfg | Projektionsobjektiv |
US5596455A (en) * | 1995-06-29 | 1997-01-21 | Minnesota Mining And Manufacturing Company | Fixed-focus triplet projection lens for overhead projectors |
-
0
- DE DENDAT287089D patent/DE287089C/de not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1299901B (de) * | 1961-11-13 | 1969-07-24 | Minnesota Mining & Mfg | Projektionsobjektiv |
US5596455A (en) * | 1995-06-29 | 1997-01-21 | Minnesota Mining And Manufacturing Company | Fixed-focus triplet projection lens for overhead projectors |
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