Mr. Huub Janssen Profile

Huub Janssen

CEO & founder at JPE b.v.

SPIE Involvement:

Conference Program Committee | Author

Area of Expertise:

astronomical instruments , precision engineering , cryogenic instruments , PiezoKnob cryogenic motor , Configurable Slit Unit

Websites:

Company Website

Proceedings Article | 20 November 2017 Open Access

Precision mechanisms for optics in a vacuum cryogenic environment

R. Navarro, E. Elswijk, N. Tromp, J. Kragt, G. Kroes, H. Hanenburg, M. de Haan, M. Schuil, M. Teuwen, H. Janssen, L. Venema

Proceedings Volume 10565, 105651S (2017) https://doi.org/10.1117/12.2309124

KEYWORDS: Mirrors, Cryogenics, Optical components, Camera shutters, Optical mounts, Optical alignment, Sensors, Astronomical imaging, Optics manufacturing, Actuators

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Proceedings Article | 22 July 2016 Paper

A cryogenic 'set-and-forget' deformable mirror

Robin Trines, Huub Janssen, Sander Paalvast, Maurice Teuwen, Bernhard Brandl, Michiel Rodenhuis

Proceedings Volume 9912, 99121B (2016) https://doi.org/10.1117/12.2231402

KEYWORDS: Mirrors, Actuators, Cryogenics, Deformable mirrors, Wavefronts, Manufacturing, Finite element methods, Superposition, Interferometers, Infrared telescopes

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This paper discusses the development, realization and initial characterization of a demonstrator for a cryogenic 'set and forget' deformable mirror. Many optical and cryogenic infrared instruments on modern very and extremely large telescopes aim at diffraction-limited performance and require total wave front errors in the order of 50 nanometers or less. At the same time, their complex optical functionality requires either a large number of spherical mirrors or several complex free-form mirrors. Due to manufacturing and alignment tolerances, each mirror contributes static aberrations to the wave front. Many of these aberrations are not known in the design phase and can only be measured once the system has been assembled. A 'set-and-forget' deformable mirror can be used to compensate for these aberrations, making it especially interesting for systems with complex free-form mirrors or cryogenic systems where access to iterative realignment is very difficult or time consuming.

The mirror with an optical diameter of 200 mm is designed to correct wave front aberrations of up to 2 μm root-mean square (rms). The shape of the wave front is approximated by the first 15 Zernike modes. Finite element analysis of the mirror shows a theoretically possible reduction of the wave front error from 2 μm to 53 nm rms. To produce the desired shapes, the mirror surface is controlled by 19 identical actuator modules at the back of the mirror.

The actuator modules use commercially available Piezo-Knob actuators with a high technology readiness level (TRL). These provide nanometer resolution at cryogenic temperatures combined with high positional stability, and allow for the system to be powered off once the desired shape is obtained. The stiff design provides a high resonance frequency (>200 Hz) to suppress external disturbances.

A full-size demonstrator of the deformable mirror containing 6 actuators and 13 dummy actuators is realized and characterized. Measurement results show that the actuators can provide sufficient stroke to correct the 2 μm rms WFE. The resolution of the actuator influence functions is found to be 0.24 nm rms or better depending on the position of the actuator within the grid. Superposition of the actuator influence functions shows that a 2 μm rms WFE can be accurately corrected with a 38 nm fitting error. Due to the manufacturing method of the demonstrator an artificially large print-through error of 182 nm is observed. The main cause of this print-through error has been identified and will be reduced in future design iterations. After these design changes the system is expected to have a total residual error of less than 70 nm and offer diffraction limited performance (λ14) for wavelengths of 1 μm and above.

Proceedings Article | 7 August 2014 Paper

Development and characterization of a 2D precision cryogenic chopper for METIS

Sander Paalvast, Robert Huisman, Bernhard Brandl, Huub Jassen, Bayu Jayawardhana, Frank Molster, Maurice Teuwen, Lars Venema

Proceedings Volume 9151, 91510D (2014) https://doi.org/10.1117/12.2054874

KEYWORDS: Mirrors, Actuators, Sensors, Cryogenics, Position sensors, Aluminum, Spectrographs, Large telescopes, Switches, Manufacturing

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Proceedings Article | 5 October 2012 Paper

Integration status of the configurable slit unit for GTC-EMIR

M. Teuwen, H. Janssen, J. M. Casalta, F. Garzón Lopez

Proceedings Volume 8446, 84465N (2012) https://doi.org/10.1117/12.925884

KEYWORDS: Calibration, Cryogenics, Actuators, Position sensors, Electronics, Capacitors, Interferometers, Astronomical imaging, Spectrographs, Manufacturing

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Proceedings Article | 13 September 2012 Paper

Development of a 2D precision cryogenic chopper for METIS

Sander Paalvast, Huub Janssen, Maurice Teuwen, Robert Huisman, Bernhard Brandl, Frank Molster, Lars Venema

Proceedings Volume 8450, 845020 (2012) https://doi.org/10.1117/12.925338

KEYWORDS: Actuators, Mirrors, Sensors, Cryogenics, Position sensors, Retroreflectors, Interferometry, Aluminum, Spectrographs, Temperature metrology

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Proceedings Article | 13 September 2012 Paper

Cryogenic actuator for subnanometer positioning

B. Bree, H. Janssen, S. Paalvast, R. Albers

Proceedings Volume 8450, 84504C (2012) https://doi.org/10.1117/12.925351

KEYWORDS: Actuators, Cryogenics, Spindles, Sensors, Electronics, Optical components, Quantum physics, Error analysis, Temperature metrology, Microscopes

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Proceedings Article | 20 July 2010 Paper

Design and prototype performance of an innovative cryogenic tip-tilt mirror

Huub Janssen, Maurice Teuwen, Ramón Navarro, Niels Tromp, Eddy Elswijk, Hiddo Hanenburg

Proceedings Volume 7739, 77394A (2010) https://doi.org/10.1117/12.856585

KEYWORDS: Mirrors, Actuators, Cryogenics, Telescopes, Space telescopes, Beam splitters, Interferometers, Prototyping, Mid-IR, Optical alignment

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Proceedings Article | 15 July 2010 Paper

METIS opto-mechanical design and packaging study

Gabby Kroes, Rik ter Horst, Jan Kragt, Ronald Roelfsema, Ramón Navarro, Lars Venema, Rainer Lenzen, Ralf Rohloff, Gilles Durand, Eric Pantin, Samuel Ronayette, Stephen Todd, Richard Bennett, Alistair Glasse, Joris Blommaert, Bernhard Brandl, Maurice Teuwen, Huub Janssen, Robert Huisman

Proceedings Volume 7735, 77352J (2010) https://doi.org/10.1117/12.856988

KEYWORDS: Imaging systems, Calibration, Mirrors, Spectroscopy, Interfaces, Imaging spectroscopy, Packaging, Electronics, Cryogenics, Wavefront sensors

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Proceedings Article | 18 July 2008 Paper

GTC-EMIR configurable slit unit development details

M. Teuwen, H. Janssen, R. Geurink, M. Boots, F. Garzón López

Proceedings Volume 7018, 70180K (2008) https://doi.org/10.1117/12.787907

KEYWORDS: Sensors, Actuators, Cryogenics, Interferometers, Calibration, Multiplexers, Telescopes, Gold, Plating, Spectroscopes

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Proceedings Article | 10 July 2008 Paper

Development of a novel actuator concept for position control of segmented mirrors of ELT

H. Janssen, R. Geurink, M. Teuwen, B. v. Bree

Proceedings Volume 7012, 70123F (2008) https://doi.org/10.1117/12.787914

KEYWORDS: Actuators, Mirrors, Telescopes, Sensors, Control systems, Segmented mirrors, Error control coding, Device simulation, Optical instrument design, Vibration isolation

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Proceedings Article | 29 June 2006 Paper

Development of configurable slit unit for GTC-EMIR

M. Teuwen, H. Janssen, R. Geurink, P. Redondo, J. Díaz-Garcia

Proceedings Volume 6269, 62694B (2006) https://doi.org/10.1117/12.671793

KEYWORDS: Actuators, Sensors, Cryogenics, Prototyping, Ceramics, Nitrogen, Microcontrollers, Signal processing, Spectroscopes, Capacitance

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Proceedings Article | 23 June 2006 Paper

Development of a novel actuator concept for position control of segmented mirrors of ELT

H. Janssen, R. Geurink, M. Teuwen, B. v. Bree

Proceedings Volume 6267, 62672U (2006) https://doi.org/10.1117/12.671670

KEYWORDS: Actuators, Mirrors, Telescopes, Sensors, Control systems, Segmented mirrors, Error control coding, Optical instrument design, Vibration isolation, Device simulation

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Showing 5 of 12 publications

Conference Committee Involvement (9)

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI

16 June 2024 | Yokohama, Japan

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V

17 July 2022 | Montréal, Québec, Canada

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV

14 December 2020 | Online Only, California, United States

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV

13 December 2020 | San Diego, California, United States

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

10 June 2018 | Austin, Texas, United States

Showing 5 of 9 Conference Committees

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