Optical design study and prototyping of a dual-field zoom lens imaging in the 1-5 micron infrared waveband

Dmitry Reshidko; Pavel Reshidko; Ran Carmeli

doi:10.1117/12.2187246

3 September 2015 Optical design study and prototyping of a dual-field zoom lens imaging in the 1-5 micron infrared waveband

Dmitry Reshidko, Pavel Reshidko, Ran Carmeli

Author Affiliations +

Proceedings Volume 9580, Zoom Lenses V; 95800C (2015) https://doi.org/10.1117/12.2187246
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

Optical systems can provide simultaneous imaging in several spectral bands and thus be much more useful. A new and current generation of focal plane arrays is allowing detection in more than one spectral region. The design of a refractive imaging lens for such detectors requires correcting chromatic aberrations over the wider range of wavelengths. However, the fewer available refracting materials, the material properties that change between the spectral bands, and the system transmission requirements make the design of such lenses particularly challenging. We present a dual-field zoom lens designed for a cooled detector sensing across short-wave infrared (SWIR) and midwave infrared (MWIR) spectral bands (continuous imaging for 1-5 μm). This zoom lens has a 75 mm focal length in the wide mode and a 250mm focal length in the narrow mode, and operates at f/4.7 in both discrete zoom positions. The lens is actively compensated to work in thermal environments from -20°C to +60°C. We discuss the optical design methodology, review the selection of materials and coatings for the optical elements, and analyze the transmission of the lens and optical performance. A prototype system has been manufactured and assembled. We validate our design with experimental data.

Citation Download Citation

Dmitry Reshidko, Pavel Reshidko, and Ran Carmeli "Optical design study and prototyping of a dual-field zoom lens imaging in the 1-5 micron infrared waveband", Proc. SPIE 9580, Zoom Lenses V, 95800C (3 September 2015); https://doi.org/10.1117/12.2187246

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