Design of infrared zoom system with rotating lens group

Yong Li; Changcheng Yang; Shenghui Li

doi:10.1117/12.759875

28 November 2007 Design of infrared zoom system with rotating lens group

Yong Li, Changcheng Yang, Shenghui Li

Proceedings Volume 6834, Optical Design and Testing III; 68343Y (2007) https://doi.org/10.1117/12.759875
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

In surveillance applications there is a need for infrared zoom systems which give two fields of view. For such systems long operation range is the most critical parameter which is bound up with focal length and transmittance of systems. In this paper the design of an infrared zoom system with rotating lens group is described. Different from the conventional axially moving zoom systems, this system is based on a rotating mechanism consisting of two separated lenses. The system achieves dual FOVs due to different magnifications. In narrow field of view mode, the system has long focal length and higher transmittance because the rotating lens group is outside the optical path. The final design is an infrared zoom system operating in 3μm~5μm, with a F number of 4.0, EFL of 250mm/62.5mm. This paper contains the calculation of first-order parameter, the optimum design of rotating motion, the analysis of aberrations, MTF, and Narcissus, This designed system has diffraction limited image quality of in both FOVs.

Citation Download Citation

Yong Li, Changcheng Yang, and Shenghui Li "Design of infrared zoom system with rotating lens group", Proc. SPIE 6834, Optical Design and Testing III, 68343Y (28 November 2007); https://doi.org/10.1117/12.759875

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available