DE297989C - - Google Patents
Info
- Publication number
- DE297989C DE297989C DENDAT297989D DE297989DA DE297989C DE 297989 C DE297989 C DE 297989C DE NDAT297989 D DENDAT297989 D DE NDAT297989D DE 297989D A DE297989D A DE 297989DA DE 297989 C DE297989 C DE 297989C
- Authority
- DE
- Germany
- Prior art keywords
- prism
- image
- directional
- agreement
- hand
- 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
- 239000011521 glass Substances 0.000 claims description 5
- 238000005530 etching Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/14—Viewfinders
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Telescopes (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE297989C true DE297989C (enrdf_load_html_response) |
Family
ID=552236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT297989D Active DE297989C (enrdf_load_html_response) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE297989C (enrdf_load_html_response) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2722862A (en) * | 1949-09-12 | 1955-11-08 | Otto G Schwede | Angular discriminating optical device |
-
0
- DE DENDAT297989D patent/DE297989C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2722862A (en) * | 1949-09-12 | 1955-11-08 | Otto G Schwede | Angular discriminating optical device |
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