EX-21.1 2 d635538dex211.htm EX-21.1

Exhibit 21.1

GSI GROUP INC. SUBSIDIARIES

Subsidiary |  | Place of Incorporation
GSI Group Corporation |  | Michigan
GSI Group Japan Corporation |  | Japan
GSI Group Singapore Pte. Ltd. |  | Singapore
GSI Group GmbH |  | Germany
GSI Group Limited |  | United Kingdom
GSI Lumonics SARL |  | France
Westwind Air Bearings Limited |  | United Kingdom
GSI Group Precision Technologies (Suzhou) Co., Ltd. |  | China
General Scanning Securities Corporation |  | Massachusetts
MicroE Systems Corp. |  | Delaware
MES International Inc. |  | Delaware
GSI Lumonics Asia Pacific Ltd. |  | Hong Kong
Excel Technology, Inc. |  | Delaware
Cambridge Technology, Inc. |  | Massachusetts
The Optical Corporation |  | California
Synrad, Inc. |  | Washington
Continuum Electro-Optics, Inc. |  | Delaware
Photo Research, Inc. |  | Delaware
Excel Laser Technology Pvt. Ltd. (1) |  | India
Excel Technology Asia Sdn. Bhd |  | Malaysia
GSI Group Europe GmbH |  | Germany
GSI Application Development (Private) Limited in Sri Lanka |  | Sri Lanka
Excel Technology Italy Srl |  | Italy
GSI Group France S.A.S. |  | France
NDS Surgical Imaging K.K. |  | Japan
NDS Surgical Imaging, LLC |  | Delaware
NDS Imaging Holdings, LLC |  | Delaware
NDS Holdings, BV |  | Netherlands
NDS Surgical Imaging BV |  | Netherlands

(1) | Excel Laser Technology Pvt. Ltd. is a 50% owned joint venture of Excel Technology Inc., an indirect wholly owned subsidiary of GSI Group Inc.