Method of producing a lens
US5298096A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1992 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Jun 19, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49904
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of producing a high-precision lens system, such as a stepper lens, involves the following steps: (a) attaching a metal frame to the radial periphery of each of a plurality of lens elements at a prescribed distance from the optical axis of the element; (b) positioning the periphery of each metal frame at a prescribed radial distance from a reference axis to align the optical axis of each lens element along the reference axis; and (c) securing the individual lens sections together. Adjustment of the eccentricity of the individual lenses is accomplished by measuring the displacement of the lens-frame periphery from the reference axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.