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S-TIH57 is an optical glass recommended for polished lens blank applications and can give low cost in the Region of higher refractive index than S-TIH53 which is used in a wide veriety of applications. We are pleased to introduce S-TIH57 which can contribute cist reduction and high -Performance to the lenses in the field of CCTV, FA / Machine Vision, Automotiv Cameras and so on.