Optical lens

Leica M-Lenses are developed for digital and film photography with the aim of meeting the highest quality standards. They are available in focal lengths from 16mm to 135mm and speeds of f/0.95. Their excellent sharpness, crisp contrasts and neutral color rendition are just as reliable as their unique compatibility: every Leica M-Lens can be used on every Leica M-Camera – since 1954!

Mitsui Chemicals, Inc. (Tokyo: 4183; President & CEO: HASHIMOTO Osamu) today announced that group company SDC Technologies, Inc. has acquired COTEC® GmbH. Engaged in the manufacture, sale and research of hydrophobic and anti-reflective coatings, COTEC® became a wholly owned subsidiary of SDC on October 1, 2020.

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“We are honored to incorporate this knowhow into the SDC organization,” said Michael Fliedner, CEO of COTEC®. “Through the partnership with SDC, the expertise of both companies in polymer chemistry and thin film coating technology is being combined. This will strengthen the innovative power of both companies. SDC’s existing distribution channels and application facilities will enable COTEC® to strengthen its presence in Asia and the Americas.”

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The first step in the life of every lens is making the right choice of glasses. The degree of purity as well as reflection, refraction and transmission properties influence the image quality right from the start. Only the best optical glass is used in the manufacture of Leica lenses. For the current lens portfolio, Leica needs around 100 different glasses for the production of around 360 different lens elements. Many of these glasses were developed and patented in our own glass laboratory, founded in 1948.

Camera lensfunction

The M-System stands for unique photography, for creative freedom and the decisive moment of capturing. M-Lenses play an essential role in this. Each M lens has its very own character, as do the many people who work on it and those who use it. The science of lens design, an intrinsic knowledge of the properties of different types of glass, and a deeply rooted passion for redefining the limits of what is physically possible flow into the DNA of every M-Lens.

“Together we can provide coating materials for all layers of a complete eyewear lens coating stack,” said Antonios Grigoriou, CEO and President of SDC. “From Mitsui Chemicals’ innovative MR™ series of high refractive index optical lens materials, to SDC’s CrystalCoat™ top layer best-in-class abrasion resistant hard coats, to COTEC®’s anti-reflective coating materials and DURALON brand family of nanocoatings offering easy-to-clean finger-print, and anti-smudge and oil/ water repellency.”

*QoV: A measure of quality and satisfaction in all areas related to eyes and eyesight in our lives. The term encompasses vision optimization and comfort, ocular health and measures to prevent optical diseases.

The Mitsui Chemicals Group intends to continue expanding the portfolio of its Vision Care Materials Division and, based on the concept of Quality of View (QoV),* will continue to pursue its commitment to product development aimed at vision correction and improving the health and comfort of the eyes. It is all part of the Mitsui Chemicals Group’s effort to bring people a better view of the world.

Building the perfect lens requires rewriting the laws of physics. Laws that also apply to Leica. Nevertheless, Leica engineers constantly strive to push the limits of what is technically possible. The result is almost flawless lenses without annoying vignetting, but with high color saturation and precise color separation.

Camera lens

The Mitsui Chemicals Group’s Vision Care Materials Division boasts a diverse product range. Its ophthalmic lens materials include the MR™ series of high refractive index optical lens materials, as well as medium and low refractive index lens materials. In the field of coating materials, the Mitsui Chemicals Group followed up its acquisition of SDC in 2008 by using the group company to bring anti-fog coating specialist FSI Coating Technologies, Inc. under its umbrella in 2010. UV-curable hard coatings producer LTI Coating Technologies, LTI was then acquired in 2014 before being subsequently integrated with SDC in a 2017 absorption-type merger. Now with hydrophobic and anti-reflective coating expert COTEC® as its latest acquisition here, the Mitsui Chemicals Group is looking to enhance its offering of coating solutions for the ophthalmic lens market.