Method of adjusting a video microscope system incorporating polarization or interference optics for optimum imaging conditions
US4412246A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1981 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | Jul 13, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/0004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for adjusting a polarizing or interference type video microscope system so as to achieve significant improvement in resolution, contrast, speed of recording, image fidelity and visibility of fine detail, the video microscope system including (1) a polarizing or interference type microscope having an iris diaphragm and a compensator and (2) a video camera having an adjustable gain control circuit and an adjustable DC restoration circuit. The method involves lowering the gain and the clamp level of the DC restoration circuit in the video camera to a minimum, then adjusting the microscope for optimum optical imaging conditions, these conditions including partly closing the iris diaphragm and setting the compensator for .+-. approximately the same bias retardation as the specimin (i.e. .lambda./100-.lambda./50), then opening the diaphragm to the maximal working aperture of the microscope objective and setting the compensator at a bias retardation of around .lambda./9 to .lambda./4, depending on source brightness, and then raising both the gain and the clamp level of the DC restoration circuit to form an image of favorable visual contrast on the video monitor. The …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.