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Super-high refractive micro-ball lenses

These micro-ball lenses are made by the single crystals which have higher refractive indices than the other glasses or ceramics. These are useful for micro-optical devices.

Features of the micro-ball lens
The optical coating is available
The special shape; hemispherical, cylindrical, and hemicylildrical are available.

$Super-high refractive micro-ball lenses$

Materials	Refractive index
Sr compound single crystals	2.4
Zr compound single crystals	2.2
Transparent ceramics	2.0
Optical glasses	1.5 - 1.8

Physical properties

	Sr compound	Zr compound
Density	11.1 g/cm³	6.05 g/cm³
Heat expansion	11.110^-6/K	10.310^-6 /K
Heat conductivity	2.0×10^-4 J/msK	1.910^-4 J/msK
Knoop hardness	595 HK	1650 HK
Refractive index	2.41 589 nm	2.19 589 nm

Please send any questions or requests for sales@shinkosha.com .

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