Orthoscopic projection lens

US10782509B2 · kind B2 · utility

Assignee

• BAE Systems Information and Electronic Systems Integration Inc. · US

Inventors

• Mark Oskotsky · Mamaroneck, US
• Michael J. Russo · San Francisco, US
• Daniel Engheben · Commack, US
• Erik L Hugel · Garden City, US
• Shawn C. Reven · Greenlawn, US
• Vincent Lipari · Great Neck, US
• Jerry Ma · Great Neck, US
• Yueli Zhang · Saint James, US

Key dates

• Filing date: Sep 14, 2018
• Grant date: Sep 22, 2020
• Expiry date: Jan 16, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B15/006
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An orthoscopic, apochromatic lens is suitable for deployment such as on aerial platforms provides distortion less than 0.2% over a full field of view of more than 60° with F # less than 6.5 and focal length greater than 3″, and in embodiments greater than 5″. Embodiments are apochromatic from 500 to 950 nm to within 7 microns. Embodiments have an overall length of less than 7″. The lens includes five optical groups with an aperture stop between the second and third groups. The optical groups have one, one, two, one and one optical element each, as ordered from the object to the image plane, and have positive, negative, positive, positive, and negative optical powers, respectively. Embodiments are telephoto. In embodiments the focal length is temperature invariant within 0.0015 inches from 0° C. to 40° C.