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S-LAH63Q is an optical glass with high refractive indices and the smallest positive dn/dT value within the LAH glass family.
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In aAutomotive camera lens systems, the focal length is often a fixed distance. Refractive index fluctuations within the optical system should certainly be a consideration, since 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. LAH glass types generally have large positive dn/dT values. However since S-LAH63Q has a dn/dT close to zero, the refractive indices fluctuations due to temperature change can be adjusted efficiently. In addition to Automotive camera lens systems, S-LAH63Q can also be used for Projectors, Interchangeable Photographic lenses, and various other applications.
Advantages
- Smallest positive dn/dT value within the LAH glass family.
- Equivalent to S-LAH63 for nd and vd. Different dn/dT can be selected from glasses with the same refractive index.
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Type |
Code |
nc |
nd |
nF |
ng |
vd |
s.g. |
Coloring |
S-LAH63Q |
804396 |
1.79840 |
1.8044 |
1.81872 |
1.83043 |
39.58 |
4.45 |
415/345 |



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