Wide field athermalized orthoscopic lens system

US8817392B2 · kind B2 · utility

Assignee

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

Inventors

• Mark Oskotsky · Mamaroneck, US
• Shawn C. Reven · Greenlawn, US
• Michael J. Russo · San Francisco, US

Key dates

• Filing date: Mar 23, 2011
• Grant date: Aug 26, 2014
• Expiry date: Jan 24, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B13/18
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A wide field optically athermalized orthoscopic lens system includes, in order from object to image, a first lens having a negative power, a second lens having a positive power, a third lens group having a positive power, a fourth lens having a positive power and a fifth lens having a negative power. The third lens group includes two lenses having, in order, a first lens with positive power and a second lens with negative power. The powers, shapes, Abbe dispersion values and temperature coefficients of refractive indices of the lenses are selected such that the lens system is athermalized, orthoscopic and achromatized over a wide (e.g. >140° C.) temperature range.