Mil.dot reticle and method for producing the same
US6729062B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jan 21, 2003 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Jan 21, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G1/38
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A reticle incorporates an optical center and a plurality of measuring points. The measuring points are formed by a primary vertical line, a primary horizontal line intersecting the primary vertical line at the optical center, a plurality of dots intersecting the primary lines and evenly spaced at a predetermined distance along the primary lines, a plurality of secondary lines intersecting one of the primary lines and evenly spaced between the dots therein. The secondary lines are shorter than 0.2 mil. Alternatively, the reticle further incorporates at least one post on at least one end of the primary lines with post hash marks thereon. Each the intersecting lines forms one of the plurality of measuring points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.