Adjustable objective holder
US4307941A · kind A · utility
Inventor
Key dates
| Filing date | Mar 13, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Mar 13, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18888
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The adjustable objective holder for optical projectors has a focussing support formed as a single piece defining two pairs of juxtaposed walls forming a parallelogram. The walls of one pair are rigid whereas the walls in the other pair are flexible. One rigid wall is fixedly mounted to the apparatus and supports for rotation a control shaft. The opposite rigid wall has on its inner surface a control groove which engages an eccentric formed on the end of the control shaft so that during the rotation of the eccentric the flexible walls are uniformly swung and due to the parallel linkage the movable rigid wall together with the objective performs a linear movement at right angles to the transparency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.