• The Optical Journal
• /
• s.162
• /
• pp.17-24
• /
• 2016

• The Optical Journal
• /
• s.157
• /
• pp.25-27
• /
• 2015

• The Optical Journal
• /
• s.159
• /
• pp.14-16
• /
• 2015

• The Optical Journal
• /
• s.158
• /
• pp.18-21
• /
• 2015

• The Optical Journal
• /
• s.160
• /
• pp.20-24
• /
• 2015

• The Optical Journal
• /
• s.161
• /
• pp.12-20
• /
• 2016

• The Optical Journal
• /
• s.172
• /
• pp.23-29
• /
• 2017

• The Optical Journal
• /
• s.176
• /
• pp.49-51
• /
• 2020

• The Optical Journal
• /
• s.175
• /
• pp.22-23
• /
• 2019

• Korean Journal of Optics and Photonics
• /
• v.33 no.6
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• pp.287-294
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• 2022

This study presents a method for designing an athermal middle wavelength infrared (MWIR) zoom lens with the iterative selection of material compositions on an athermal glass map. The optical properties of glass for MWIR are generally very sensitive to temperature, compared with visible glass. To compensate for focus error due to temperature change, the non-athermalized zoom system requires a large amount of movement of a compensator, which results in an unstable zoom system. To solve this problem, the material compositions for an athermal zoom lens have effectively been obtained using the thermal aberration correction process analytically on an athermal glass map. An expander lens is used to enlarge the focal lengths of an original main zoom lens two times. Finally, while this expander is attached to an original athermal zoom system, the final zoom system equipped with this expander doubles the focal length ranges and has stable performance over a specified temperature range.