Imaging optics
US9488812B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 15, 2013 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Nov 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide thin imaging optics that have magnification-adjustment functionality and can fit in a small-form-factor electronic device that has limited thickness or layout space. These imaging optics, which have magnification-adjustment functionality that allows magnification adjustment, are characterized in that a prism (P) with the ability to bend the optical axis by 90° is positioned on the object side. These imaging optics are also characterized in that at least the following are laid out, in this order, behind the optical-axis bending means: a positive-power first group (G1) that produces an intermediate image (II), said intermediate image (II) being a real image; a positive-power second group (G2) that refracts off-axis light rays toward a central axis (O); and a positive-power third group (G3) that focuses the intermediate image (II) onto an imaging element. Light-ray heights at the V-edges throughout the imaging optics are thereby kept low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.