OSI Systems
An American electronic systems company serving security inspection, healthcare monitoring, and optoelectronics markets.
Last updated August 22, 2026
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Overview
OSI Systems, Inc. is an American technology and manufacturing company headquartered in Hawthorne, California. Founded in 1987 by Deepak Chopra, the business initially operated under the name Opto Sensors, Inc. before adopting the OSI Systems name in 1997. It developed from an optoelectronics and sensor-focused enterprise into a diversified group supplying equipment and services to security, healthcare, and electronic systems customers. The company’s principal operating activities are organized around several business areas and subsidiaries. Rapiscan Systems supplies security and inspection technologies, including airport and cargo screening equipment, X-ray systems, and metal-detection products. Spacelabs Healthcare provides patient-monitoring and related clinical systems, including equipment used in hospital and critical-care environments, as well as anesthesia and diagnostic monitoring technologies. OSI Optoelectronics and related operations produce optoelectronic components and assemblies, while OSI Electronics provides electronic manufacturing and systems-integration services. OSI Systems expanded through a long series of acquisitions, minority investments, partnerships, and newly formed operating entities. Early transactions strengthened its sensor and optical capabilities, while the acquisition of Rapiscan-related security businesses gave the company a platform in aviation and security inspection. Healthcare expansion accelerated through acquisitions involving medical monitoring, diagnostic cardiology, anesthesia, and other clinical technologies. The company also developed international manufacturing and operating capabilities, including activities in Malaysia and India. The group’s business model combines proprietary equipment development, component manufacturing, systems integration, and service support. This vertical and multi-division structure allows OSI Systems to participate in complete equipment programs as well as in the supply of specialized components. Its customers and end users span airports, border-control and security organizations, hospitals, clinicians, defense-related users, and industrial or commercial electronics manufacturers. The company has remained publicly listed on the Nasdaq under the ticker symbol OSIS. Its portfolio is characterized by technically specialized products, regulatory and procurement requirements, and long sales cycles, particularly in aviation security and healthcare. The company has also continued to invest in production capacity and international operations, including a medical-device manufacturing facility near Rajiv Gandhi International Airport in Hyderabad, India. OSI Systems is therefore best understood as a diversified electronic systems group rather than as a single-product consumer brand.
History
OSI Systems was founded in 1987 as Opto Sensors, Inc., reflecting its original emphasis on optical sensors and related electronic technologies. The company acquired UDT Sensors in 1990, broadening its sensor capabilities. In 1993 it acquired Rapiscan Security Products Limited and Ferson Optics, creating an early foundation for the security-inspection and optical businesses that later became important parts of the group. In 1994, it formed ECIL-Rapiscan Security Products Limited with Electronics Corporation of India Limited and established Opto Sensors (Malaysia) Sdn. Bhd., combining partnership-based expansion with international manufacturing activity. The company continued to expand through acquisitions during the second half of the 1990s. It acquired Advanced Micro Electronics AS in 1997, Osteometer MediTech A/S in 1998, and the security-products business of Metorex International Oy in the same year. It also purchased a minority stake in Square One, Inc.; in 2000, it acquired substantially all of that company’s assets. These transactions added manufacturing, medical, and security-related capabilities. In 1997, the company changed its operating name from Opto Sensors, Inc. to OSI Systems, Inc., marking the transition toward a broader systems-oriented corporate identity. Healthcare became a more prominent business area through a sequence of transactions from the late 1990s into the 2000s. OSI Systems acquired Aristo Medical Products in 1999 and formed OSI Medical in the same year. It later formed RapiTec in 2000 and Dolphin Medical in 2001; OSI Medical was merged into Dolphin Medical in March 2002. Other transactions in 2002 included the acquisition of substantially all assets of Thermo Centro Vision, a minority interest in CXR Limited, and all outstanding capital stock of Ancore Corporation. CXR subsequently became a wholly owned subsidiary in December 2004. OSI Systems also developed businesses serving military, laser-training, engineering, and electronic systems markets. In 2003 it acquired the military laser-based training business of Schwartz Electro-Optics and later that year acquired substantially all remaining assets of the company. It also acquired substantially all assets of J&D Engineering (UK) Limited. These steps complemented the company’s existing sensor and electronic manufacturing activities. A major healthcare milestone came in 2004, when OSI Systems acquired Spacelabs Medical. The transaction established Spacelabs as a central healthcare platform within the group and expanded the company’s presence in patient monitoring and related clinical equipment. In 2005, OSI Systems acquired Blease Medical Holdings Limited, adding anesthesia-related healthcare capabilities. In 2006, it acquired Del Mar Reynolds, a British diagnostic-cardiology company, and added that business to its healthcare organization. The company maintained international expansion after the acquisition period. In 2011 it established a new office in Hitech City in Hyderabad, India. In 2016, OSI Systems offered approximately $269 million to acquire American Science and Engineering, a United States producer of X-ray equipment. The proposal reflected the strategic importance of inspection and imaging technologies to the company’s security business. In 2022, OSI Systems established a new approximately 50,000-square-foot factory near Rajiv Gandhi International Airport in Hyderabad, specializing in medical-device manufacturing. Today, OSI Systems operates as a diversified provider of security inspection systems, medical monitoring and anesthesia technologies, optoelectronic products, and electronics manufacturing services. Its principal branded platforms include Rapiscan Systems in security and inspection and Spacelabs Healthcare in medical technology. The company’s historical development has been defined by technical specialization, vertical integration, international expansion, and the use of acquisitions to assemble complementary operating businesses.
- 2022
Medical-device factory established near Hyderabad
[1]The company established an approximately 50,000-square-foot medical-device manufacturing facility near Rajiv Gandhi International Airport.
- 2016
American Science and Engineering acquisition offer
[1]OSI Systems offered approximately $269 million to acquire American Science and Engineering, a maker of X-ray inspection equipment.
- 2011
Hyderabad office established
[1]OSI Systems established an office in Hitech City in Hyderabad, India.
- 2006
Del Mar Reynolds acquired
[1]The company acquired British diagnostic-cardiology business Del Mar Reynolds and incorporated it into its healthcare organization.
- 2005
Blease Medical acquired
[1]OSI Systems acquired Blease Medical Holdings Limited, adding anesthesia-related products and capabilities.
- 2004
Spacelabs Medical acquired
[1]The acquisition expanded OSI Systems’ healthcare operations and established Spacelabs as a core medical-technology business.
- 1998
Security and medical portfolio expanded
[1]OSI acquired Osteometer MediTech, purchased the security-products business of Metorex International, and invested in Square One.
- 1997
Corporate name changed to OSI Systems
[1]The company changed its name from Opto Sensors, Inc. to OSI Systems, Inc.
- 1993
Rapiscan and Ferson Optics acquisitions
[1]OSI acquired Rapiscan Security Products Limited and Ferson Optics, expanding into security inspection and optical technologies.
- 1990
UDT Sensors acquired
[1]The company acquired UDT Sensors, strengthening its sensor-related activities.
Products and positioning
A vertically integrated provider of specialized electronic systems for security inspection, healthcare monitoring, optoelectronics, and electronics manufacturing.
Security inspection systems
Rapiscan Systems
Rapiscan Systems is OSI Systems’ security and inspection business. It develops and markets equipment used for aviation, cargo, border, and general security screening, including X-ray inspection systems and metal-detection technologies. The business represents one of the company’s principal platforms and traces its corporate connection to the acquisition of Rapiscan Security Products Limited in 1993.
Medical monitoring systems
Spacelabs Healthcare
Spacelabs Healthcare supplies medical monitoring and related clinical technologies. Its portfolio is associated with patient monitoring and hospital-care applications, and it forms a central part of OSI Systems’ healthcare organization following the acquisition of Spacelabs Medical in 2004.
Optoelectronic components
OSI Optoelectronics
OSI Optoelectronics represents the group’s optoelectronic and sensor-oriented activities. These operations support the production of specialized optical and electronic devices and components, linking the company’s current portfolio to its original focus on optical sensors.
Electronic manufacturing services
OSI Electronics
OSI Electronics provides electronic manufacturing and systems-related services. The business complements OSI Systems’ proprietary product operations by supporting the manufacture, assembly, and integration of electronic products and subsystems for specialized markets.
Brand decisions
2016
Offer to acquire American Science and EngineeringM&ABackground
American Science and Engineering was a United States manufacturer of X-ray inspection equipment, a field closely related to OSI Systems’ security and inspection business.
Action taken
OSI Systems offered approximately $269 million to acquire the company.
Acquisition offer value. (2016)
Recent events
Reported
OSI Systems reports fiscal 2021 results[3]
OSI Systems announced results for its fourth quarter and fiscal year ended June 30, 2021, reporting fourth-quarter revenue of $332.2 million and fiscal-year revenue of $1.147 billion.
Reported
OSI Systems changes fiscal 2020 guidance[4]
OSI Systems increased its fiscal 2020 non-GAAP earnings guidance and lowered its sales outlook.
Sources6 sources
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