Quadrant conical-lens microscope
US4469411A · kind A · utility
Inventor
Key dates
| Filing date | Aug 10, 1981 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Aug 10, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosure is a microscope in which magnification is produced by multiple quadrant stages of conical lenses. Conical lenses receive and emit parallel rays of light, and they can be stacked vertically in series to produce multiple magnification which increases at an exponential rate and which extends into the hundreds of thousands and millions. The rays emitted by the conical lens do not converge and cross as they do with the spherical lens, and there is no inverting of images. It is possible, therefore, to divide the lens into quadrants, that is, into four 90.degree. longitudinal sectors which are cemented together prior to grinding and then separated after grinding. The quadrants are mounted vertically in the microscopic tube to produce images of the same magnification as four whole lenses though in a field of view which is reduced in size to one fourth. Moreover, the quadrants can be rotated into and out of the line of vision, thereby making possible a number of magnification settings equal to the number of quadrants being used. A single-tube four-stage quadrant microscope with stage and eyepiece magnification of 5.times. will produce enlarged images of 5.times., 25.times., 1…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.