Union Optical Co., Ltd.

Union Optical Co., Ltd. (ユニオン光学株式会社) is a Japanese precision optics manufacturer based in Tokyo. According to its official website, the company designs and manufactures precision optical equipment used across a range of markets, including optical microscopes, objective lenses, and step/thickness measuring instruments. It describes itself as an optical manufacturer that handles everything from design through production in-house, and it emphasizes flexibility in customizing products, which has helped it expand its activities in China and other Asian countries. The company's product lineup, as listed on its homepage, includes measuring instruments, industrial microscopes, objective lenses, and exposure equipment. Specific product names shown on the site include DH2, THS-10, DCM-40/60, DZ4-E/T, UWZ2, MCB-1D, GP-101A/202, and high-grade objective lenses EMA-400. Union Optical also maintains a network of overseas distributors (海外代理店). Union Optical has an active trade-show presence, with homepage topics listing participation in events such as OPIE (Optics & Photonics International Exhibition) in 2019, 2021, 2022, 2023, 2025, and 2026, the 測定計測展 (Measurement and Measurement Exhibition) in 2021, 2023, and 2025, and the 国際画像機器展 (International Image Technology Exhibition) in 2020. It also took part in local Tokyo events such as the いたばし産業見本市 (Itabashi Industrial Trade Fair) and the 板橋オプトフォーラム (Itabashi Opto Forum) in 2020, and was interviewed for a JETRO program in 2020. In terms of product development, the homepage notes that in 2016 the company developed and began selling the non-contact groove thickness measuring machine THG, and that it began manufacturing and selling the non-contact semi-automatic step thickness measuring machines DH2-AM and THS-208 with a new autofocus system. The company continues to present itself as a specialist supplier of precision optical instruments for industrial and scientific applications.

Union Optical Co., Ltd. is a Japanese precision optics company headquartered in Tokyo. Public information about its early history is limited, but its official website and Wikidata identify it as a company in Tokyo, Japan. The company has built its business around the design and manufacture of precision optical instruments, including optical microscopes, objective lenses, and step/thickness measuring machines. According to its homepage, Union Optical handles everything from design to manufacturing in-house, a capability it highlights as a core strength. It also states that it responds flexibly to product customization requests, which has helped it expand its presence in China and other Asian countries. The company maintains a network of overseas distributors. Over the years, Union Optical has introduced a series of measuring instruments. In August 2016, it began manufacturing and selling the non-contact semi-automatic step thickness measuring machines DH2-AM and THS-208, which feature a new autofocus system. In October 2016, it developed and launched the non-contact groove thickness measuring machine THG. These products reflect the company's focus on non-contact, precision measurement solutions for industrial applications. Union Optical has also maintained a visible presence at industry trade shows. Its website lists participation in OPIE (Optics & Photonics International Exhibition) in 2019, 2021, 2022, 2023, 2025, and 2026; the Measurement and Measurement Exhibition (測定計測展) in 2021, 2023, and 2025; and the International Image Technology Exhibition (国際画像機器展) in 2020. It has also taken part in local Tokyo events such as the Itabashi Industrial Trade Fair and the Itabashi Opto Forum in 2020. In July 2020, the company was interviewed for a JETRO program titled 'The World Now.' As of its 2026 website, Union Optical continues to present a product lineup that includes measuring instruments, industrial microscopes, objective lenses, and exposure equipment, with named products such as DH2, THS-10, DCM-40/60, DZ4-E/T, UWZ2, MCB-1D, GP-101A/202, and the high-grade objective lens EMA-400. The company remains active in the precision optics field.

• Began manufacturing and selling non-contact semi-automatic step thickness measuring machines DH2-AM and THS-208 with new autofocus.

• Developed and launched the non-contact groove thickness measuring machine THG.

• Exhibited at MEMS Sensing & Network Systems Exhibition 2017.

• Exhibited at OPIE'19 (Lens Design and Manufacturing Exhibition 2019) at the Itabashi booth and at the Precision Machining Measurement Exhibition 2019.

• Interviewed for JETRO program 'The World Now'.

• Exhibited at the 7th Itabashi Opto Forum.

• Exhibited at the 24th Itabashi Industrial Trade Fair.

• Exhibited at the International Image Technology Exhibition 2020.

• Exhibited at OPIE'21.

• Exhibited at the Measurement and Measurement Exhibition 2021.

• Exhibited at OPIE'22.

• Exhibited at OPIE'23.

• Exhibited at the Measurement and Measurement Exhibition 2023.

• Exhibited at OPIE'25.

• Exhibited at the Measurement and Measurement Exhibition 2025.

• Exhibited at OPIE'26.

• Released a company PR video.

Precision optics manufacturer offering in-house design-to-manufacturing and flexible customization for industrial and scientific markets.

• DH2

  Measuring instrument listed on the company's product page.

• THS-10

  Measuring instrument listed on the company's product page.

• DCM-40/60

  Measuring instrument listed on the company's product page.

• DZ4-E/T

  Measuring instrument listed on the company's product page.

• UWZ2

  Measuring instrument listed on the company's product page.

• MCB-1D

  Measuring instrument listed on the company's product page.

• GP-101A/202

  Measuring instrument listed on the company's product page.

• EMA-400

  High-grade objective lens listed on the company's product page.

• THG

  Non-contact groove thickness measuring machine developed and launched in 2016.

• DH2-AM

  Non-contact semi-automatic step thickness measuring machine with new autofocus, manufacturing and sales started in 2016.

• THS-208

  Non-contact semi-automatic step thickness measuring machine with new autofocus, manufacturing and sales started in 2016.

1. 1ユニオン光学株式会社union.co.jp
2. 2Union Optical Co., Ltd. (Japan) - Wikidatawikidata.org