Project manager with a combined strategical management and technical systems engineering approach. Plays an integrating role in multinational / multilingual teams.
Line manager with the ability to build a strong team with all required competences to design and deliver unique - never seen before - equipment to discover unknown territories.
Specialties
project management, systems design, R&D management, requirement and specification definition, interface management, (optical design, mechanical design, cryogenic design, optics manufacturing and procurement, mechanical manufacturing, planning for assembly, integration and testing)
Experience
Optical measurement techniques, laser fabrication, semiconductor process, lithography, telescopes and astronomical instrumentation.
Line manager with the ability to build a strong team with all required competences to design and deliver unique - never seen before - equipment to discover unknown territories.
Specialties
project management, systems design, R&D management, requirement and specification definition, interface management, (optical design, mechanical design, cryogenic design, optics manufacturing and procurement, mechanical manufacturing, planning for assembly, integration and testing)
Experience
Optical measurement techniques, laser fabrication, semiconductor process, lithography, telescopes and astronomical instrumentation.
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In this report, we provide an update to our continuing efforts to characterize the S-FPL51 and S-LAH71 glass under cryogenic conditions. These efforts include a measurement of the refractive index (293 K, 100 K and 80 K), transmission measurements (293 K, 77 K and 43 K) and a determination of the coefficient of thermal expansion (between 293 K and 45 K). We will describe the cryogenic test setups that we have used to obtain our results, and provide summarizing equations of these material properties.
This characterization will prove useful for conceptual design trade-offs, mechanical interface solutions and detailed optical design for future near-infrared instrumentation on large telescopes.
The two SMO arms contain 14 mirrors and form the MIRI optical system together with 12 selectable gratings on grating wheels. The entire system operates at a temperature of 7 Kelvin and is designed on the basis of a 'no adjustments' philosophy. This means that the optical alignment precision depends strongly on the design, tolerance analysis and detailed knowledge of the manufacturing process. Because in principle no corrections are needed after assembly, continuous tracking of the alignment performance during the design and manufacturing phases is important.
The flight hardware is inspected with respect to performance parameters like alignment and image quality. The stability of these parameters is investigated after exposure to various vibration levels and successive cryogenic cool downs. This paper describes the philosophy behind the acceptance tests, the chosen test strategy and reports the results of these tests. In addition the paper covers the design of the optical test setup, focusing on the simulation of the optical interfaces of the SMO. Also the relation to the SMO qualification and verification program is addressed.
Mounting optics is always a compromise between firmly fixing the optics and preventing stresses within the optics. The fixing should ensure mechanical stability and thus accurate positioning in various gravity orientations, temperature ranges, during launch, transport or earthquake. On the other hand, the fixings can induce deformations and sometimes birefringence in the optics and thus cause optical errors. Even cracking or breaking of the optics is a risk, especially when using brittle infrared optical materials at the cryogenic temperatures required in instruments for infrared astronomy, where differential expansion of various materials amounts easily to several millimeters per meter. Special kinematic mounts are therefore needed to ensure both accurate positioning and low stress.
This paper concentrates on the opto-mechanical design of optics mountings, especially for large transmission optics in cryogenic circumstances in space instruments. It describes the development of temperature-invariant (“a-thermal”) kinematic designs, their implementation in ground based instrumentation and ways to make them suitable for space instruments.
The test and verification setups presented in this paper include wave front error measurements, alignment inspection, spectral measurements, material properties determination and varying gravity orientation capabilities (gravity load vector). The measurement principles are explained, together with the most important error contributions and the achieved accuracies.
The active means to influence the segment shape by use of the warping harness has been completely redesigned. A very important quality that has been achieved is simplicity. Hence a minimum amount of components is used. Reliability and safety are other aspects that have been greatly improved compared to the prototypes. The design for the M1 segment support provides a solution that not only performs to specification but one that can be operated in a telescope environment, all 798 of them.
Ground-based search for the brightest transiting planets with the Multi-site All-Sky CAmeRA: MASCARA
Alignment robustness for 90 nm and 65 nm node through copper alignment mark integration optimization
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You will have access to both the presentation and article (if available).
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