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S-LAH52Q has positive dn/dT

S-LAH52Q is an optical glass with extremely large positive dn/dT. In Automotive camera lens systems, the focal length is often a fixed distance. Refractive index fluctuations within the optical system should certainly be a consideration, as cars are used in environments where the temperature range can vary widely from below zero in colder climates to more that 50°C inside a car on a summer day. Since many optical glasses have low dispersion and negative dn/dT values, the refractive indices fluctuations due to temperature change can be adjusted efficiently when these materials are combined with S-LAH52Q. In addition to Automotive camera lens systems, S-LAH52Q can also be used for Projectors, Interchangeable Photographic lenses, and various other applications.


  • Extremely large positive dn/dT
  • Can be used for automotive camera lenses, projectors and photographic interchangable lenses


Type Code nc nd nF ng vd s.g. Coloring
S-LAH52Q 800422 1.79389 1.79952 1.81282 1.82356 42.24 4.47 390/335
S-LAH52 800422 1.79388 1.79952 1.81281 1.82355 42.2 4.41 40/34