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Article Abstract
An athermal zoom system is designed to meet the light weight requirements of space station health observation applications. In this study, we employ a loss function to steer the material parameters within the front fixed group and to mitigate the focal power contributed by individual lenses. This approach facilitates the optimization of thermal aberrations and manufacturing tolerances. The system maintains a stable image surface in the temperature range of -40-+60, and the first lens is made of fused silica, which is resistant to space radiation. The focal length of the zoom system is 12-120 mm, the number is 3.0-5.0, the working band is 486-656 nm, the total length is 100 mm, the maximum distortion is less than or equal to 2%, and the field of view is 35.6°-3.55°. It is suitable for 1/2.35-in. CMOS. It is small in size and light in weight, good in tolerance, and high in stability, which is more in line with the needs of satellite loads.
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To meet the demand for continuous zoom capabilities in compact lenses over a wide temperature range, we designed a compact continuous zoom optical system based on hybrid meta-optics. This system can achieve thermal stability without additional heating or cooling across a broad temperature range, utilizing commonly available optical glass. It features a total length of just 9∼12 mm and comprises only 4 lenses.
View Article and Find Full Text PDFAn athermal zoom system is designed to meet the light weight requirements of space station health observation applications. In this study, we employ a loss function to steer the material parameters within the front fixed group and to mitigate the focal power contributed by individual lenses. This approach facilitates the optimization of thermal aberrations and manufacturing tolerances.
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Appl Opt
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Electro-Optics Section, Materials and Electro-Optics Research Division, Chung-Shan Institute of Science and Technology, Lung-Tan 325, Taiwan, China.
A step-zoom and reimaging structure were utilized to construct a dual field-of-view optical design for high-magnification switching in the 3-5 microm spectral band. The design has a flexible optomechanical layout, which means it can be utilized for multipurpose applications. The effects of the surrounding environmental temperature and axial gradient temperature are analyzed using the concept of thermal resistance, and the thermal compensation is discussed.
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