Invention Grant
- Patent Title: Peripheral filtering lens
- Patent Title (中): 外围滤镜
-
Application No.: US11541190Application Date: 2006-09-29
-
Publication No.: US07791797B2Publication Date: 2010-09-07
- Inventor: Kenneth H. Lau , Ronald L. Williams
- Applicant: Kenneth H. Lau , Ronald L. Williams
- Applicant Address: US CA El Segundo
- Assignee: The Aerospace Corporation
- Current Assignee: The Aerospace Corporation
- Current Assignee Address: US CA El Segundo
- Agency: Ocean Law
- Agent Paul D. Chancellor
- Main IPC: G02B23/00
- IPC: G02B23/00 ; G02B5/22

Abstract:
A filter or lens for a star tracking telescope includes a clear center portion and an attenuating peripheral portion where the peripheral portion attenuation of off-axis images is nonidentical through any radial line extending from a center of the filter or lens to a circumference edge of the filter or lens for passing on-axis images with high signal to noise ratios and for attenuating off-axis images for attenuating but not completely blocking the off-axis images, which 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.
Public/Granted literature
- US20080080078A1 Peripheral filtering lens Public/Granted day:2008-04-03
Information query