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Wavefront Control Strategies for Large Active Thin Shell Primaries with Unimorph Actuators

ACTUATORS (2023)

Adaptive Deployable Thin Spherical Shell Reflectors

Carl Johan G. Nielsen et al.

Summary: The paper examines the shape control of a spherical shell reflector with PVDF-TrFE thin film, addressing the issue of thermal sensitivity and proposing a balanced design for improved surface figure accuracy. Research shows that the balanced design is more effective for a petal reflector compared to a full reflector in terms of reducing surface figure error and control voltages.

ACTUATORS (2022)

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Proceedings Paper Astronomy & Astrophysics

Status of the ESO's ELT construction

Roberto Tamai et al.

Summary: This paper summarizes the current progress of the ESO's ELT Construction, including advancements in design, manufacturing, assembly, and infrastructure upgrade.

GROUND-BASED AND AIRBORNE TELESCOPES IX (2022)

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Article Engineering, Mechanical

Adaptive Shell Spherical Reflector Actuated with PVDF-TrFE Thin Film Strain Actuators

Kainan Wang et al.

Summary: This paper discusses the design and manufacturing of a thin polymer spherical adaptive reflector controlled by 25 independent electrodes. Experimental influence functions of control electrodes were determined, showing an improvement in manufacturing process and the ability to approximate optical modes with reasonable voltages. The study confirms that the active material can be modeled by a quadratic model and achieve excellent properties with proper annealing.

ACTUATORS (2021)

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Article Engineering, Mechanical