Piezoelectric illumination control for microscope
US6181073A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Jun 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2822
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A piezoelectric illumination control circuit for a microscope comprising a tunable frequency source of alternating current, a piezoelectric crystal having an impedance dependent on operating frequency, driven by the tunable frequency source of alternating current, and a load driven by the piezoelectric crystal. A second embodiment comprises a piezoelectric illumination control circuit for a microscope, comprising a constant frequency source of alternating current, a piezoelectric crystal coupled to a tunable dummy reactive load for the purpose of varying the impedance of the crystal and dummy load, the piezoelectric crystal driven by the constant frequency source of alternating current, and a load driven by the piezoelectric crystal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.