Optical systems employing refractive and diffractive optical elements to correct for chromatic aberration
US5148314A · kind A · utility
60Cited by
1References
10Claims
0Family size
Inventor
Key dates
| Filing date | Jun 6, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Jun 6, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical structures are disclosed that comprise selected combinations of refractive and diffractive type optical elements wherein net chromatic aberrational effects are minimized in images formed by said structures. With the disclosed structures, chromatic aberrational contributions from each type of optical element, having characteristically opposite algebraic sense, are essentially cancelled out by means of proper distribution of optical power plus suitable arrangement and relative location of the said optical elements. Advantages over the prior art are demonstrated in four general types of optical structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.