EX-21.1 3 d262588dex211.htm GSI GROUP INC. SUBSIDIARIES

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 UK |  | United Kingdom
GSI Lumonics SARL |  | France
Westwind Air Bearings Limited UK |  | 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
Control Laser Corporation (d/b/a Baublys Control Laser) |  | Florida
Synrad, Inc. |  | Washington
Continuum Electro-Optics, Inc. |  | Delaware
Photo Research, Inc. |  | Delaware
Quantronix Corporation |  | Delaware
Excel Laser Technology (1) |  | India
Excel Technology Asia Sdn. Bhd |  | Malaysia
Excel Technology Europe GmbH |  | Germany
Excel Technology Lanka (Pvt.) Ltd. |  | Sri Lanka
Excel Technology Japan Holding K.K. |  | Japan
Excel Technology Italy Srl |  | Italy
Baublys Control Laser GmbH |  | Germany
Excel Technology France S.A.S. |  | France
Excel Technology Japan K.K. |  | Japan

(1) | Excel Laser Technology is a 50% owned joint venture of GSI Group, Inc.