Aspheric lens surface-decenter measuring method and apparatus
US7760365B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2008 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Jan 7, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/9583
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A relationship between surface decenter of a lens 1 under test and surface-decenter comatic aberration and a relationship between surface tilt of the lens 1 under test and surface-tilt comatic aberration are calculated by computer simulation. The surface tilt of the lens 1 under test is calculated by measuring a transmissive wavefront of a projecting portion 3, and comatic aberration of the lens 1 under test is calculated by measuring a transmissive wavefront of a lens portion 2. The surface-decenter comatic aberration that occurs due to the surface decenter is calculated by subtracting the surface-tilt comatic aberration from the calculated comatic aberration. The surface decenter of the lens 1 under test is calculated based on the calculated surface-decenter comatic aberration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.