Magnifier lens assembly
US4958913A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1988 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Oct 31, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B25/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnifier lens assembly mounted within a lamp head including a barrel housing and a first, second and third lens, each of the lenses having a convex surface, an opposing substantially planar surface and a center axis of symmetry of the convex surface; the first, second and third lenses being mounted successively and coaxially within the barrel housing with the convex surface of the first lens facing the convex surface of the second lens, and the substantially planar surface of the second lens facing the convex surface of the third lens wherein the barrel housing includes means for securing the lenses in relatively fixed relation to each other and means for securing said magnifier lens assembly within said lamp head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.