Lens unit and method of making the same
US8493677B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 2012 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Aug 1, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49993
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens unit includes a lens holder of stainless steel and a converging lens fixed to a lens holding hole of the lens holder. The lens holder is formed by pressing, or stamping from a metal plate, made of a compressed stainless steel plate material, having a predetermined thickness with a narrow tolerance. Upon stamping, the metal plate is fractured, thus forming an outer tapered surface at one end of the outer surface of the lens holder. When the outer surface and the rear end surface of the lens holder are allowed to abut against a positioning recess in order to position the lens holder, the outer tapered surface is opposed to the corner of the positioning recess.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.