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12th HLEM 2022 - High Level Expert Meeting Asphere Metrology


12th HLEM 2022 - High Level Expert Meeting Asphere Metrology
Di, 15. März 2022 - Mi, 16. März 2022
Messen und Ausstellungen


UPOB Logo HLEM Asphere Metrology RGB

12th - High Level Expert Meeting (HLEM 2022) - Asphere Metrology

In the field of asphere metrology, many new advancements were achieved, new measurement procedures were developed and precision was noticeably improved. In previous High-Level Expert Meetings (HLEM) and workshops, developers, manufacturers and users have confirmed the great interest in asphere metrology.

Please learn more about previous events by following links ( HLEM 2021, HLEM 2019, HLEM 2018, HLEM 2017; Workshop 2016; HLEM 2015; HLEM 2013; Workshop 2012; HLEM 2012, HLEM 2010)

In order to manufacture ultra-precise and high-tech optical components and to be capable of further miniaturization, reliable and extremely precise measurement technology is required. Both the introduced measurement systems as well as the results of round robin measurements show the enormous potential of this field of technology. In addition, a great need for comparability, standardization and proximity to users was also pointed out.

Save the NEW DATE  - 12th HLEM 2022, March 15-16, 2022!

R e g i s t e r   H E R E !

Find here the Progam Preview

Find here the Detailed Program

Find here the Call for Measurements and Contributions

Find here the Program Flyer


This HLEM 2022 website will be actualized regularily, do you need any information that is currently not avaliable here?

Don´t hesitate to contact Mr. Klawitter in our administrative office!


Of special Interest HLEM 2022 - This time Online again!

Due to the current situation we are planning to hold our 12th HLEM online again.
Regardless of whether we come together face to face or online, the accompanying HLEM industry exhibition and the poster area of the Young Scientist Prize Winners (YSA) will again be an integral part of our event!

As you can see, the topic asphere metrology remains very interesting!


HLEM in Spring 2022

Our upcoming 12th HLEM 2022 is dedicated to the presentation of measurement results of current lenses (4 parts), discussion and dissemination of new developments and recent scientific results in asphere and free form metrology for reflective and transmissive surfaces. With this broader scope we aim to supplement our previous events while also addressing asphere and free form metrology to interested scientists, developers and manufacturers.

Four different samples are available for measurements through kind support of Berliner Glas (Berlin), Physikalisch-Technische Bundesanstalt (Braunschweig), LT-Ultra (Herdwangen-Schönach) and Asphericon GmbH (Jena). The marks on the glass samples were realized by NTG GmbH (Gelnhausen).

The following samples are available:

standard asphere (#3.3) - metal optics (CGH for #3 is available)

precision cylinder (#5.1)

convex toroid (#6.1)

double sided Asphere (#9.1) - unmounted


Planned Main Topics of HLEM 2022

Several companys and institutions are planning to perform measurements on the available samples.
Main topic of the conference will be the presentation of the measurement results of the four samples.

Main Topic:

Presentation of the results of the round robin

Comparison of current results


The following topics are also of interest:

Additional Topics:

New developments in measuring techniques for aspherical, free-form and cylindrical lenses

Coating of lenses and optical surfaces

Manufacturing and measurement of metal optics

Measurement of unmounted aspheres

Inner centration of aspheres

Other topics related to asphere and free-form metrology or production


HLEM 2019 Bild Programm

D o w n l o a d    h e r e  the Detailed Program!

D o w n l o a d    h e r e  the Program Flyer!




Y o u r   c h a n c e   t o   j o i n !

Would you like to perform measurements and give a presentation?

Would you like to receive more details of the "round robin" samples?

Would you like to give a lecture without measurements?

Are you interested in participating?

Are you interested in participating in the supporting exhibition?


Please send an e-mail with your request to: Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein!


D o w n l o a d   h e r e   your registration!



YSA 2020

YSA 2022 - Young Scientist Award 

Awarding the 4th Young Scientist Award will round out the programme!

In addition to the scientific part of the event, which focuses on the topic of asphere metrology, the CC UPOB e.V. will award a prize for the forth time in 2022. Young scientists up to the age of 30, have opportunity to present their work to an interested specialist audience during the High-Level Expert Meeting. By a jury of the participants the best work will be selected and priced.

Submissible topics are scientific papers from the following fields of activity:

precision methods e.g. MRF, SPDT, IBF ...

■ approaches to additive precise optics production

■ cleaning and coating, multi-layer coatings

■ metrology and data analysis in production chain for aspheres and freeforms

■ ultra-flatness; diffraction base plates; nanostructures


Applicants have the opportunity to apply with an abstract in english with a picture and 250 words by 16.01.2022 ==> extended to 31.01.2022 at the CC UPOB e.V. office.

At the beginning of the conference, the pre-selected works will be presented by the candidates in a short presentation.
During the breaks, the participants can continue to find out about the topics in a poster session.
At the end of the conference, the award ceremony will take place.

You will find more details in HLEM Call for Papers and also in HLEM Program Flyer.


 HLEM 2022 BANNER 3 One Two Three 500px quadrat

Key Dates

Measurements & Meeting:

Start of measurements:
   1 July 2021 - still running

Application for measurements:
   is opened

Abstract deadline „none measurement contributions“:
   30 October 2021 - extended 3 December 2021

Deadline for performing measurements:
   15 December 2021 - extended 6 February 2022

Deadline to submit measured data:
   Not later than 2 weeks after end of your measurement period

Deadline to submit author & title:
   30 October 2021 - extended 3 December 2021


Deadline registration for industrial exhibition:
   1 March 2022 (first come first serve)


Start registration:
   Autum 2021 (download registration form here)

Deadline registration:
   1 March 2022

Organizational Details

Date of Meeting:
15 - 16 March 2022


Please register by letter, fax or E-Mail using the registration form.
Following this you will receive an invoice and confirmation.

Attendance fee:
Lecturers:                          € 225 (1st person)
Members:                          € 225
W3+ Exhibitors:                 € 475
Wetzlar Network Partner:   € 475
Non-members / others:      € 625

Please pay in advance after you have received the invoice.


Recommended Accomodation: ==> not necessary in 2022

Get Together: ==> not planned in 2022

Conference Dinner: ==> not planned in 2022

Conference Location: ==> ONLINE

Travel: ==> not necessary in 2022

Learn more about all downloadable files of this event here


Mr. Heiko Klawitter
Tel.: +49 531 592-5131
Fax.: +49 531 592-69-5131
Please send e-mails to Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein!

Bundesallee 100
38116 Braunschweig










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