double concave lens

Model:	JIFFODCONCAVE
Brand:	Jiffo
Origin:	Made In China
Category:	Electronics & Electricity / Electronic Instrument / Optical Lens & Instrument
Label:	double concave lens , bi concave lens , optical concave lens
Price:	US $1 / pc
Min. Order:	5 pc

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Product Description

Double concave lens

Double concave lenses are manufactured with both surfaces concave.
These lenses have negative focal lengths.
Material BK7 or schott material
Diameter tolerance: +0, -0.1mm
Focal length tolerance: +/-1%
Center thickness tolerance: +/-0.1mm
Centration:< 3 arc min
Surface quality: 20-10
Coatings:Antireflection coatings or NIR coatings or no