Double-Concave Lenses -CHUO PRECISION INDUSTRIAL CO.,LTD.-

Double-Concave Lenses

Double-concave lens (uncoated)

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Double-concave (DCV) lens has two inward curved surfaces and a negative focal length. This is used for image reduction and to spread light.

Classification	Double-concave lens （DCV）
Coating	Uncoated
External form D(mm)	φ20.0
f(mm)	-20.0
B.f(mm)	-20.55
t1(mm)	5.03
t2(mm)	2
Radius R1(mm)	-31.82
Material	N-SF11
Surface quality	60-40
Clear Aperture(mm)	[Dia.] -1.5
Externals Tolerance(mm)	0/-0.1
Enter Thickness Tolerance(mm)	±0.1
Centering(mm)	3′～5′
Bevel	MAX 0.3
Design Wavelength DWL	587.6nm
Focal Length Tolerance(mm)	±1％
Edge Thickness ET	Reference