Reticle for stadiametric rangefinding
US7877886B1 · kind B1 · utility
52Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 2009 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Dec 11, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G1/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A reticle for stadiametric rangefinding has a horizontal crosshair and a vertical crosshair that are attached to an optical element. The optical element defines an optical axis and a field of view. The crosshairs intersect perpendicularly at a location that is offset from the optical axis. There may be a plurality of rangefinding indicia shaped to indicate the size of an object at a specific range. The rangefinding indicia may be arranged in a position other than vertical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.