document

Hot forming of a large deformable mirror facesheet

Jonker, W.A. (author), Kuiper, S. (author), Kamphues, F.G. (author), Vogel, P.A. (author), Tuan Vu, A. (author), Meiners, C. (author), Horst, R. (author), Navarro, R. (author), Arnold, T. (author)

Conventionally, facesheets for deformable mirrors (DM) are manufactured through grinding, polishing and finishing of a piece of optical glass. Due to the amount of material that needs to be removed, the required surface form errors and the complex handling of the fragile product throughout all manufacturing steps, this is a lengthy, risky and...

conference paper 2022

document

Manufacturing and integration status of the UH2.2 Adaptive Secondary Mirror

Jonker, W.A. (author), Kuiper, S. (author), Kamphues, F.G. (author), Bos, A. (author), Dekker, A. (author), Chun, M. (author), Benschop, A. (author), Priem, H. (author), Monna, B. (author), Nair, M. (author), Gupta, T. (author), Ackaert, G. (author), Bola, S. (author), Varvaringos, I. (author), Schroth, J. (author)

A consortium of industrial and academic partners, coordinated by TNO, is working on the realization of a 620mm adaptive secondary mirror (ASM) for the University of Hawaii’s 2.2-meter telescope. The ASM consists of a 620mm-diameter slumped convex aspherical mirror shell, manipulated by 210 variable-reluctance actuators mounted on a light...

conference paper 2022

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Preliminary design of the Adaptive Secondary Mirror for the European Solar Telescope

Kuiper, S. (author), Bos, A. (author), de Vreugd, J. (author), Witvoet, G. (author), Dekker, A. (author), Kamphues, F.G. (author), Slegtenhorst, G.F. (author), Jonker, W.A. (author), Maniscalco, M.P. (author), Femenía-Castella, B. (author), Núñez Cagigal, M. (author), Bienes Pérez, J. (author), Cózar-Castellano, J. (author), González-Cava, J.M. (author), Mato, A. (author), Soler Trujillo, A.M. (author), Vega Reyes, N. (author)

This paper describes the preliminary design of the Adaptive Secondary Mirror (ASM) for the European Solar Telescope (EST), as designed by TNO. This ASM will contain 1950 actuators over an optical aperture of Ø80cm. The mirror-shell of this ASM is concave with a radius of 2.156m and has a thickness of 2.5mm. To cope with the high optical heat...

conference paper 2022

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Progress on the University of Hawaii 2.2-meter adaptive secondary mirror

Chun, M.R. (author), Ryan, A. (author), Zhang, R. (author), Kuiper, S. (author), Ackaert, G. (author), Baranec, C. (author), Baeten, M.J.J. (author), Bos, A. (author), Bowens-Rubin, R. (author), Dekker, A. (author), Dungee, R. (author), Gupta, T. (author), Hinz, P. (author), Jonker, W.A. (author), Kamphues, F.G. (author), Lai, O. (author), Lu, J. (author), Maniscalco, M.P. (author), Monna, B. (author), Nair, M. (author), Nijenhuis, J.R. (author), Priem, H. (author), Vogel, P.A. (author)

We report on progress at the University of Hawaii on the integration and testing setups for the adaptive secondary mirror (ASM) for the University of Hawaii 2.2-meter telescope on Maunakea, Hawaii. We report on the development of the handling fixtures and alignment tools we will use along with progress on the optical metrology tools we will use...

conference paper 2022

document

Performance of large-format deformable mirrors constructed with hybrid variable reluctance actuators II: Initial lab results from FLASH

Bowens-Rubin, R. (author), Dillon, D. (author), Hinz, P.M. (author), Kuiper, S. (author)

Advancements in high-efficiency hybrid variable reluctance (HVR) actuators are an enabling technology for building the next generation of large-format deformable mirrors, including adaptive secondary mirrors. The Netherlands Organization for Applied Scientific Research (TNO) has developed a new style of hybrid variable reluctance actuator that...

conference paper 2021

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Design and MAIT Status of the UH2.2 Adaptive Secondary Mirror

Jonker, W.A. (author), Kuiper, S. (author), Nijenhuis, J.R. (author), Dekker, A. (author), Bos, A. (author), van de Ven, E.A. (author), Chun, M. (author), Priem, H. (author), Breukers, M. (author)

An adaptive secondary mirror (ASM) is currently being developed for the UH2.2 telescope, consisting of a slumped 620mm convex aspherical facesheet, manipulated by 210 variable-reluctance actuators and supported on a siliconaluminium alloy support structure. The total power dissipation of the actuators is expected to be under 3 Watts. The ASM...

conference paper 2020

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Large dynamic range Atomic Force Microscope

Herfst, R.W. (author), van Es, M.H (author), Kuiper, S. (author), Witvoet, G. (author), Peters, J. (author), Willekers, R.W. (author)

In semiconductor manufacturing, the shrink following Moore's law requires ever tighter overlay and registration between the different (material) layers. For accurately characterising this overlay and registration, TNO has developed a large dynamic range atomic force microscope demonstrator; the LDR-AFM can measure marker-to-feature distances...

article 2020

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A new adaptive secondary mirror for astronomy on the University of Hawaii 2.2-meter Telescope

Chun, M. (author), Baranec, C. (author), Lai, O. (author), Lu, J.R. (author), Zhang, R. (author), Kuiper, S. (author), Jonker, W.A. (author), Maniscalco, M. (author)

We are developing a new adaptive secondary mirror (ASM) for the University of Hawaii 2.2-meter telescope based on a novel and very efficient hybrid variable reluctance actuator developed by TNO. The actuator technology has broad implications on the ASM design and results in an ASM with a thicker facesheet, lower power dissipation, and simple...

conference paper 2020

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Performance of large-format deformable mirrors constructed with TNO variable reluctance actuators

Bowens-Rubin, R. (author), Hinz, P. (author), Jonker, W.A. (author), Kuiper, S. (author), Laguna, C. (author), Maniscalco, M. (author)

conference paper 2020

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Developing adaptive secondary mirror concepts for the APF and W.M. Keck Observatory based on HVR technology

Hinz, P.M. (author), Bowens-Rubin, R. (author), Baranec, C. (author), Bundy, K. (author), Chun, M. (author), Dillon, D. (author), Holden, B. (author), Jonker, W.A. (author), Kosiarek, M. (author), Kupke, R. (author), Kuiper, S. (author), Lai, O. (author), Lu, J.R. (author), Maniscalco, M. (author), Radovan, M. (author), Ragland, S. (author), Sallum, S. (author), Skemer, A. (author), Wizinowich, P. (author)

An Adaptive secondary mirror (ASM) allows for the integration of adaptive optics (AO) into the telescope itself. Adaptive secondary mirrors, based on hybrid variable reluctance (HVR) actuator technology, developed by TNO, provide a promising path to telescope-integrated AO. HVR actuators have the advantage of allowing mirrors that are sti↵er,...

conference paper 2020

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Novel motorization axis for a coarse pointing assembly in optical communication systems

Kramer, L. (author), Peters, J. (author), Voorhoeve, R.J. (author), Witvoet, G. (author), Kuiper, S. (author)

The demand for higher data transfer between satellites and ground stations is ever increasing. To address this, (free-space) optical communication (OC) technology is emerging. Pointing mechanisms with low size, weight and power (SWaP), high accuracy and low recurring costs are key enablers for constellations of OC systems. In this paper, TNO...

conference paper 2020

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Electromagnetically actuated deformable mirror technology

Kuiper, S. (author), Saathof, R. (author)

TNO’s DM technology is based on a unique electromagnetic actuator. TNO is targeting the DM development for applications for atmospheric corrections in both astronomy and laser communication applications.

other 2019

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Opto-mechatronics system development for future intersatellite laser communications

Saathof, R. (author), Kuiper, S. (author), Crowcombe, W.E. (author), de Man, H. (author), de Lange, T.J. (author), van der Valk, N.C.J. (author), Kramer, L. (author), Fritz, E.C. (author)

Optical communications will complement radio frequency (RF) communications in the coming decades to enhance throughput, power efficiency and link security of satellite communication links. To enable optical communications technology for intersatellite links and (bi-directional) ground to satellite links, TNO develops a suite of technologies in...

conference paper 2019

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Coarse pointing assembly

Kuiper, S. (author), Kramer, L. (author), Siegl, M. (author), Spierdijk, J.P.F. (author), Moens, T.M.N. (author), Peters, J. (author), Oostdijck, B. (author), Crowcombe, W.E. (author)

TNO’s is developing Coarse Pointing Assembly technology aimed at the needs for future laser communication systems.

other 2019

document

TOmCAT OGS – Optical Feederlink

Human, J.D. (author), Petersson, H.I.M. (author), Ferrario, I. (author), den Breeje, R. (author), Klop, W.A. (author), Pettazzi, F. (author), Silvestri, F. (author), Gruber, J.M. (author), Saathof, R. (author), Moens, T.M.N. (author), Russchenberg, T. (author), de Lange, T.J. (author), Spierdijk, J.P.F. (author), Hazelebach, R.L.M. (author), Kuiper, S. (author), Scheffers, P.I. (author), Korevaar, C.W. (author)

To overcome data rate limitations of RF communication links with satellites, TNO and Airbus Netherlands envision optical free-space communication feeder links for next generation high throughput satellites. This poster presents a feasibility assessment of such links and the technology needed by means of a link budget and a turbulence model of...

other 2019

document

Fine steering mirror

Kuiper, S. (author), Kramer, L. (author), Dekker, B. (author), Nieuwkoop, E. (author), Witvoet, G. (author), Human, J.D. (author), Lemmen, M.H.J. (author), Crowcombe, W.E. (author)

TNO’s FSM technology is based on a unique electromagnetic actuator. The key benefits of this technology for are: Large range; ±2˚ optical range (both axis) - High band width: Closed loop bandwidth > 1kHz - Highly compact; ø27x30mm with ø20mm mirror - Reliable; Redundant windings, no wear, Passed life-time testing.

other 2019

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Line-to-line repetitive control of a 6-DoF hexapod stage for overlay measurements using Atomic Force Microscopy

Witvoet, G. (author), Peters, J. (author), Kuiper, S. (author), Oomen, T. (author)

The overlay performance between different layers of semiconductor devices is a key parameter for correct functionality of such devices. With device features getting increasingly smaller, there is a need for novel and more accurate overlay metrology tools. This paper aims to increase the positioning accuracy of such a novel metrology machine...

conference paper 2019

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First results from the Large Dynamic Range Atomic Force Microscope for overlay metrology

Witvoet, G. (author), Peters, J. (author), Kuiper, S. (author), Keyvani, S. (author), Willekers, R.W. (author)

TNO is developing a novel Large Dynamic Range Atomic Force Microscope (LDR-AFM), primarily but not exclusively designed for sub-nm accurate overlay metrology. The LDR-AFM combines an AFM with a 6 degrees- of-freedom interferometric positioning stage, thereby enabling measurements of sub-nm features on a wafer over multiple millimeters marker-to...

conference paper 2019

document

Filter wheel mechanism

Kuiper, S. (author), Kramer, L. (author), Kooper, M. (author), Crowcombe, W.E. (author)

TNO’s is developing Coarse Pointing Assembly technology aimed at the needs for future laser communication systems.

other 2019

document

Adaptive secondary mirror development for the UH-88 telescope

Kuiper, S. (author), Jonker, W.A. (author), Maniscalco, M.P. (author), Priem, H. (author), Coolen, C. (author), Chun, M. (author), Baranec, C. (author), Lu, J. (author), Lai, O. (author)

TNO and industrial partners VDL ETG, L3Harris and Hyperion are developing a novel Adaptive Secondary Mirror (ASM) for Ground Layer Adaptive Optics (GLAO) at the University of Hawaii’s 88-inch telescope on Mauna Kea. The ASM is based on a unique actuator principle which delivers a >30µm PV 99% linear stroke at a very high efficiency in terms of...

conference paper 2019