Mr. Nicolas Ummen Profile

Nicolas Ummen

at HENSOLDT Optronics GmbH

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 27 May 2022 Presentation + Paper

Assembly and qualification of cryogenic infrared relay optics

Christofer Siemens, Martin Hinz, Torsten Gross, Nicolas Ummen, Anke Vogelgsang, Marcus Zimmermann, Torsten Antrack, Dirk Jahn

Proceedings Volume 12103, 121030G (2022) https://doi.org/10.1117/12.2620999

KEYWORDS: Interfaces, Optical testing, Data modeling, Relays, Cryogenics, Ocean optics, Infrared radiation

Read Abstract +

METimage is the Visible/Infrared Imaging mission (VII) on METOP-SG series, providing moderate resolution optical imaging of atmosphere and surface variables in multiple spectral channels ranging from 0.443 to 13.345 µm with a spatial sampling of 500 m. The instrument was developed by an industrial team led by Airbus Defense and Space GmbH on behalf of the German Space Administration Deutsches Zentrum für Luft und Raumfahrt (DLR) with funds from the German Federal Ministry of Transport and Digital Infrastructure and co-funded by EUMETSAT under DLR Contract No. 50EW1521. Hensoldt Optronics GmbH designed and manufactured two main components for the METimage instrument: the hyperspectral filter assemblies and the refractive relay infrared optics. The components are challenged by harsh environmental loads, while maximum optical performance must be met for precise data collection. Optics mounting was realized by sophisticated glue-free design, which had to be tested for long term sturdiness, stability and optical performance at cryo-vacuum conditions. Therefore, a well-tailored assembly and testing procedure was developed, based on an Optical Ground Support Equipment (OGSE) capable of illuminating and sensing wavefront errors at multiple MWIR and LWIR wavelength. After 6 years of development the project comes to an end and at the beginning of 2022 all flight models are delivered. Hensoldt Optronics GmbH shares in this paper insights into the testing strategies and setups for the relay optics. The design and functionality of the used OGSE is explained as also the importance of the accompanying optical modelling.

Proceedings Article | 18 May 2020 Paper

Design and testing of cryogenic infrared relay optics

Christofer Siemens, Torsten Gross, Martin Hinz, Manfred Uebele, Lukas Kress, Denis Lober, Nicolas Ummen, Dirk Jahn, Hans Becker

Proceedings Volume 11388, 113880N (2020) https://doi.org/10.1117/12.2558819

KEYWORDS: Relays, Infrared imaging, Cryogenic lens design, Infrared lenses, Optical mounts, Testing and analysis

Read Abstract +

METimage will be the Visible/Infrared Imaging mission (VII) of the METOP-SG series. It is going to provide moderate ground resolution optical imaging of clouds, aerosols and surface variables in 20 spectral channels ranging from 443 to 13 345 nm with a spatial sampling of 500 m. The METimage instrument is in development by an industrial team led by Airbus Defence and Space GmbH on behalf of the German space administration DLR with funding from the German Federal Ministry of Transport and Digital Infrastructure (BMVI) and co funding by EUMETSAT under DLR Contract No. 50EW1521. In the context of this program Hensoldt Optronics GmbH designs, integrates and tests novel multispectral filter assemblies and refractive relay infrared optics for the METimage instrument. Both assemblies have to deliver optical performance in cryogenic-vacuum conditions post launch and deployment loads, which is a challenging demand. The development led to intricate glue-free mounting designs for filters and lenses. To establish the system’s optical performance a combination of prototyping, optical simulation, ambient adjustment and cryogenic-vacuum verification is necessary. For the latter a hexapod-carried OGSE was developed, capable to illuminate and sensing wavefront errors at multiple MWIR and LWIR wavelengths. This paper provides insights into the opto-mechanical designs of the relay optics and the hyperspectral filters. Furthermore the setups for adjustment and qualification tests will be described. The current project progress is reflected here within.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years