Double Concave Lens

Name: Double Concave Lens
Brand: ECOPTIK INDUSTRIAL PTE.LTD.

The double-concave lens is a basic diverging optical element. It is applied in beam expansion systems, virtual imaging systems, and in complex optical systems. In achromatic doublet lenses, the negative lens element often adopts a double-concave or plano-concave design to offset the chromatic aberration or field curvature of the positive lens.

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Specifications Of Double Concave Lens

Material	Optical glass/ Fused silica/ sapphire etc.
Diameter	2mm~300mm
Diameter tolerance	±0.05mm(≤50mm)
Diameter tolerance	±0.1mm(＞50mm)
Focal length	-50mm~-2000mm
Focal length tolerance	±0.2%（＜10mm）
	±0.5%（＜10mm-1000mm）
	±1%（＜＞1000mm）
Center Thickness	2mm~20mm
Surface quality	60/40, 40/20, 20/10
Surface accuracy	λ/2~λ/10@632.8nm, 532nm
Clear Aperture	>85% dig diameter
Centration	<3arc min~ 30arc sec
Coating	As per customer's request

Material	Diameter (mm)	Surface Radius 1 (mm)	Surface Radius 2 (mm)	Center Thickness (mm)	Focal Length (mm)
H-ZK3	5	-14.4	-14.4	3	-9.8
H-ZF6	8	-7.2	-30.5	5	-7.4
H-K9L	10	-11.1	-11.1	2	-10.4
JGS1	10	-9.25	-9.25	1.25	-9.8
H-ZF7LA	11	-11.9	-11.9	2	-7.1
H-K9L	12	-25.1	-25.1	1.26	-24
BAF3	12	-19.5	-47.1	2	-23.4
ZF11	12	-12.6	-12.6	3	-7.4
H-K9L	12.5	-103	-103	1.5	-98.9
H-ZF6	13	-30.6	-154	3	-33.5
H-LAK7	13	-48.9	-27.7	2	-24.4
H-ZK2	13	-12.1	-15.7	1	-11.3
H-ZF6	13.5	-34.7	-79.6	1.5	-31.6
H-ZF2	14	-36.2	-192	3	-45
H-ZF6	14	-34.7	-79.6	3	-31.6
H-LAK53A	14	-31.7	-58.8	1.5	-27
H-K9L	14	-27.9	-32.2	2	-19
H-ZF6	15	-23	-27.7	2.8	-16.4
H-ZF6	15	-27.5	-23.6	7.23	-16.4
H-F3	15	-50.5	-11.3	1.5	-14.8
N-SF6	15	-13.2	-12.1	2	-7.4
H-ZF3	16	-30.6	-15.8	3	-14.6
H-LAF50B	16.7	-16.8	-17.8	1.8	-11
H-LAF50B	17.3	-37.2	-37.2	3	-23.9
H-K9L	20	-299	-85.4	2	-128
H-ZF52A	20	-51.6	-21	1.9	-16.7
H-ZF6	21	-77.4	-77.4	2.5	-51
H-ZF7LA	21	-42.6	-184	4.064	-42.8
H-ZF7LA	22	-255	-16.2	9	-18.7
H-K9L	24	-11.1	-90	1	-18.9
JGS1	25	-92.1	-92.1	2.5	-100
H-K9L	25	-52.1	-52.1	3.5	-50
H-LAF4	25	-38.4	-38.4	8.4	-25.4
H-F4	25	-36.7	-29.2	3	-25
ZK9	27	-149	-52.9	1.45	-62.7
H-ZK21	28.6	-281	-23.8	3	-35
BaK2	29.5	-2249	-80.2	2	-143
JGS1	30	-71	-71	3	-77
BaK2	30.5	-2249	-76.4	2	-137
H-ZF3	32	-11.8	-284	2	-15.7
ZF1	41	-692	-170	2.8	-211
ZF7L	44	-153	-49	3	-45.8
ZF4	54	-340	-249	2.5	-197
H-ZF3	58	-73.8	-234	4	-77.8
F4	60	-74.9	-78.4	1	-61.3
ZF1	65	-516	-163	5.49	-190
ZBaF3	65	-296	-52.4	2.5	-67.5
H-ZF2	68	-83.5	-249	5.5	-92.3
F13	68	-2465	-41.8	3	-65.6
H-F4	72	-170	-71.8	12	-80
H-K9L	90	-102	-347	6	-15.2