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Sapphire Domes

Optical domes are hemispheric windows which provide a protective boundary while allowing a clear field of view between two environments.
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Sapphire Domes


Featuring exceptional physical strength, resistance to corrosion and durability under extreme pressure and temperature, sapphire domes are ideal for use in harsh environments such as camera dome ports and submersible windows.  

They are typically made of two parallel surfaces. April Optics manufactures optical domes in a wide variety of substrates, suitable for visible, IR, or UV light. 


General Parameters: 

Material: N-BK7 , H-K9L, JGS1,  Sapphire, etc.

Diameter: 5mm-200mm or as customized

Diameter Tolerance: +/-0.1mm 

Thickness: >2mm 

Thickness Tolerance: ±0.2~0.1mm 

Center Deviation: 3-5' 

Surface Accuracy:  1L, 1/2L or according to the size 

Surface quality:  80/50, 60/40. 

Chamfers:  0.2 x 45° typical 

Coating: as customized




"Quality first, customer first, development and innovation"
Nanjing April Electro-Optics Ltd. founded in 2012, is specialized in high-precision cold processing of crystal materials, with sapphire, quartz and optical glass as raw materials. Core products including window, lens, crystal rod, prism, ball, filter, cylindrical mirror, ball cover, and so forth. 

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