Conical wide-field microscopic lens
US4492438A · kind A · utility
Inventor
Key dates
| Filing date | Feb 19, 1982 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Feb 19, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A conical stage lens which receives and emits parallel rays of light and which can be used singly to produce magnified images and concentrated beams or in series to produce multiple magnified images and multiple concentrated beams. The stage lens consists of four component lenses, each with a refractive section (face) which widens the beam by 473 percent, this being the means by which enlargement of the object is accomplished. When used as a microscopic lens, a lower component lens splits the image from the object into a wide annular image. Two middle component lenses refract the annular image outward, and a reflective cylindrical section forming the outer wall of the second middle component lens reflects the image inward to the upper component lens, where it is refracted a fourth time and emitted parallel to the incipient beam from the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.