Low-cost, light-weight, compact binoculars
US5633753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1994 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Oct 11, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Light weight, low-cost, compact binoculars intended to be sold at retail locations and popular attractions, such as stadiums, arenas, tourist destinations, and theme parks. The binoculars utilize high reflectance mirrors to fold light and lengthen distance between the objective lens and the field lens to correct the orientation of the image. The binoculars are very light because they are made with mirrors and lightweight, injection molded acrylic plastic lenses. They are pocket sized and compact, yet adjustable for individual interocular distance. The field view is rectangular in format and the IP adjustment is by way of sliding action between nested housings made possible by virtue of the fact that the inversion and reversion functions in its separate housings are in opposite order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.