Peripheral filtering star tracker telescope
US7719761B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2006 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Sep 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A filter or lens for a star-tracking telescope includes a clear center portion and an attenuating peripheral portion. The peripheral portion attenuates off-axis images through any radial line extending from a center of the filter or lens to a circumference edge of the filter or lens. The attenuation is for passing on-axis images with high signal to noise ratios, for attenuating off-axis images, and for attenuating but not completely blocking the off-axis images. The telescope with such a filter or lens is well suited for improved star tracking systems, and well suited for reducing off-axis glare in handheld optical apparatus such as binoculars, telescopes, cameras, and eyeglasses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.