Visa information

Since Germany is a member state of the Schengen Area, it allows nationals of 62 countries to enter Germany for stays of a maximum of 90 days without having to apply or obtain a visa. Citizens of EU member states: no visa required. Citizens of Non-EU states: visa always required.  For additional details and specific visa requirements, please see links below or contact the German Embassy in your country.

Information on visas and passports Berlin

Read full details on Germany's entry requirements and visas


SPIE recommends that you secure your travel visa before registering for the conference as cancellations after the preregistration cutoff date may result in a cancellation fee.

How to request an invitation letter - for authors and attendees only

  1. Sign in to this site using your SPIE credentials (username and password)
  2. After you are signed in, click on this link to go directly to the SPIE invitation letter request form page
  3. Click on the “Apply” button to begin the invitation letter request form.
  • Complete one form per person (requests for accompanying family members can be included in the same application)
  • Your name must be listed exactly as it appears on your passport. Any differences could lead to delay or denial of your visa
  • Requests are processed based on the order received, and the date of the conference
  • You will receive an email with a link to download a PDF of your official invitation letter after it is approved and processed
  • Printed invitation letters are mailed by request only. Please allow up to four weeks for delivery
  • SPIE is unable to contact embassies or consulates on behalf of or in support of any individual making arrangements to attend an SPIE event
  • If you have questions regarding invitation letters or changes are needed to an existing invitation letter, contact invitationletters@spie.org (include your SPIE Paper Number)


How to request an invitation letter - for exhibitors only

    To request an invitation letter if you are an exhibitor at an SPIE event fill out and submit the Exhibitor Invitation Letter Request Form and submit the Exhibitor Invitation Letter Request Form

    • For exhibitors requiring a letter of invitation from SPIE to obtain a travel visa to participate in the exhibition
    • You must be listed as an exhibitor (or co-exhibitor) of this exhibition or your request will not be processed
    • Requests are processed and prioritized based on the order received and the date of the exhibition (usually within 3 weeks)
    • The invitation letter PDF will be sent via OneDrive with a link to access the Invitation Letter, and by FEDEX if requested
    • SPIE is unable to contact embassies or consulates in support of an individual attempting to attend an SPIE exhibition