Designing a 1.7-5.3 µm athermalized lens

R. Bardazzi

doi:10.1117/12.799917

2 October 2008 Designing a 1.7-5.3 μm athermalized lens

R. Bardazzi

Proceedings Volume 7113, Electro-Optical and Infrared Systems: Technology and Applications V; 71130W (2008) https://doi.org/10.1117/12.799917
Event: SPIE Security + Defence, 2008, Cardiff, Wales, United Kingdom

Abstract

In the framework of a research program a broad band lens (1.7÷5.3 μm) has been designed to be inserted in an optoelectronic system of the Italian Navy. The optoelectronic system operates over full spectral band or over one of the seven sub-bands that are selected inserting spectral filters mounted on a wheel. The optoelectronic system FOV is 20°x15°, aperture F/# 2.4 and it is optically athermalized in the range -30°÷+70° C. Color aberrations correction and athermalization was obtained by means an appropriate choice of optical materials (Cleartran, Sapphire, BaF2 and CaF2). The optical athermalization has been achieved for an all aluminum mechanical mounting. The lens mechanical mounting is quite cheap as no moving parts are present while focusing is obtained regardless the objective temperature. The optical layout is composed by five lenses. The design was driven to have a low sensitive manufacturing and mounting tolerances. A diffractive lens free solution was selected because of the unacceptable radiation losses in the higher diffractive orders due to the wide spectral band. Dedicated BBAR coatings for Sapphire and Cleartran have been developed.

Citation Download Citation

R. Bardazzi "Designing a 1.7-5.3 μm athermalized lens", Proc. SPIE 7113, Electro-Optical and Infrared Systems: Technology and Applications V, 71130W (2 October 2008); https://doi.org/10.1117/12.799917

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