Name: Meniscus Lens
Brand: ECOPTIK(CHINA)LTD

Meniscus Lens

Ecoptik China provides meniscus lens in both positive and negative focal lengths. These meniscus lenses are useful when used with another lenses to increase or decrease the focal length. This meniscus lens element configuration does not introduce any additional coma or spherical aberrations.

Uses Meniscus Lens 

Description Of Positive & Negative Meniscus Lens

Ecoptik China (also known as BRD Optical) provides meniscus lens in both positive and negative focal lengths. On the aspect of shape, it can be divided into convex meniscus lens and concave meniscus lens. On the aspect of the effect, it can be divided into diverging and converging meniscus lens.

Positive Meniscus Lens

A positive meniscus lens consists of two curved surfaces with similar radii of curvature and has a positive focal length. Positive meniscus lens are typically used for related applications such as reducing the focal length of another lens, increasing the numerical aperture, etc.In order to reduce spherical aberration, the beam should be incident on the convex surface of the lens when re-expanding or condensing or diverging collimated light is used; when it is used for converging light collimation, the beam should be incident on the concave surface.

Positive meniscus lenses are primarily used to minimize spherical aberration. When used in combination with another lens, a positive meniscus lens can reduce the focal length and increase the numerical aperture of the system without introducing significant spherical aberration. When used to converge parallel light, the convex surface of the lens should be oriented towards the direction of light emission in order to minimize spherical aberration. Coated lenses are also widely used in the visible and near-infrared fields.

Negative Meniscus Lens

A negative meniscus lens consists of two curved surfaces with similar radii of curvature and has a negative focal length.
Usually used to reduce the focal length of another lens, increase the numerical aperture and other related applications.
When used for focused beam collimation, the beam is incident on a concave surface. Negative meniscus lenses are mainly used to minimize spherical aberration.

Specifications Of Positive&Negative Meniscus 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)	Convex Surface Radius (mm)	Concave Surface Radius (mm)	Center Thickness (mm)	Focal Length (mm)
H-K9L	7	4.6	-4.60	3	41.4
H-LAF38	8	6.28	-95.10	2.2	8.9
H-ZBAF5	8	9.7	-19.72	2.27	26
H-ZF52A	8	12.05	-9.50	4.2	217
ZnSe	8.6	11.22	-50.58	1.4	8.7
H-ZF62	9	9.911	-38.55	2.1	13.8
H-ZF62	9	10.59	-13.37	7.64	23.8
H-K9L	10	5.19	-500.00	6.2	10.1
JGS1	10.802	7.69	-7.28	3	226.1
H-K9L	11	16.57	-156.37	3	35.5
H-LAF50A	12	13.176	-132.74	3.3	18.7
H-ZK9	12	11.57	-48.93	2.86	23.7
H-ZBAF21	12	15.374	-65.11	3	27
H-ZK3	13	8.088	-21.23	4	23.2
S-LAM7	13	16.94393	-170.00	2.5	24.9
H-ZLAF75A	14	13.804	-51.24	2.4	20.1
H-ZF7LA	14	11.324	-5.50	9.54	49.3
H-K9L	14	10.36	-14.62	5	50.3
H-ZLAF68	14	10.16	-6.87	6.4	282.2
H-ZF6	15	119	-18.95	3.86	30.3
H-LAF3B	15	20.73	-145.88	2.8	32.2
H-K9L	15	9.26	-18.16	3.5	32.3
H-ZLAF55A	15	28.847	-293.95	3	38.1
H-ZK3	15.2	15.3	-231.90	2.8	27.67
LAF10	15.5	24.66	-163.59	2.7	36.52
H-LAF53	16	12.823	-33.57	4.8	25.4
H-ZLAF52	16	18.67	-67.51	3	31.2
H-ZK6	16	13.996	-34.67	3.5	36.4
H-LAK4	16	22.7	-39.63	4	74.8
H-ZLAF68	16	11.251	-7.74	4.8	78.1
ZK9	17	11.695	-11.70	7	81.4
H-ZF13	18	96.302	-26.99	1.5	48.2
H-K9L	18	36.4	-51.52	3.5	222.45
H-LAF10L	18.98	21.38	-32.36	3.6	69.8
H-ZK9A	19	13.895	-29.05	3.6	39.4
ZK7	19.4	17.783	-43.05	3	47.29
H-LAF53	20	16.482	-55.46	4	30.1
H-ZK10	20	18.054	-35.41	5	53.3
H-ZLAF66	20	21.099	-28.09	5	80.3
H-ZK7	20	60.67	-778.00	2.9	106.8
H-BAK4	22	17.497	-114.52	4.7	36.7
H-LAK3	22	21.04	-39.81	3.8	54.7
H-ZBAF3	22	38.9	-498.90	2.7	63.8
H-K9L	22	72.44	-1130.00	5	149.5
H-BAK4	22.5	24.619	-1735.00	5	45
H-ZF7LA	22.6	22.44	-28.91	9.88	74
H-LAF53	23	16.788	-36.22	5	38
H-LAF53	23	16.788	-36.22	5	38
BAF5	23	32.8	-219.10	3	62.3
H-ZK1	23.4	46.48	-176.06	4.56	109.6
H-LAK59	23.48	102.33	-194.98	2.5	308.2
H-ZF7LA	24	17.819	-30.30	10	39.6
H-K9L	25	17.3	-27.00	4.55	80.3
H-K9L	25.4	32.1	-82.20	3.6	100
JGS1	25.4	31	-91.20	4	100
H-K9L	25.4	66.2	-182.20	2.8	200
JGS1	25.4	64.2	-209.80	2.9	200
H-K9L	25.4	100.9	-288.20	2.5	300
ZK9	25.5	22.96	-89.26	4.4	48.59
N-SF6	26	32.15	-176.40	4	43.2
H-LAK3	26	26.79	-127.94	4.2	44.4
H-K9L	26	23.93	-331.70	6	49.58
H-ZK11	27	23.07	-77.04	4.8	49.8
H-LAK1	27	26.24	-74.99	4.1	59.8
H-ZK10	27	38.688	-1541.90	5	63.7
H-ZK10	27	43.279	-311.79	5	80
H-ZK9	28	21.82	-83.35	5.5	46.07
H-ZBAF21	28	37.865	-862.87	3.5	54.7
H-LAF53	30	18.75	-52.24	7.5	35.9
H-K9L	30	18.8	-37.95	5.9	65.7
ZK9	32	23.99	-42.85	8	75.58
H-BAK4	33	23.4	-38.20	6.2	95.14
H-K9L	33	50.35	-85.11	3.1	231.74
H-ZF6	33.5	213.8	-46.03	2.97	71.9
H-ZK98	34	49	-75.00	4.5	213.7
H-ZBAF3	35	38.15	-212.35	10	69.2
H-K9L	36	64.9	-116.41	3.6	277.48
H-ZBAF3	40	52.2	-2148.00	12.1	81.3
H-K9L	40	45.71	-62.37	3.5	309.27
H-K9L	41	78.52	-622.30	4.1	173.57
H-K9L	41	65.77	-111.94	3.7	300.61
F2	42	28.5	-71.30	8.8	71.8
H-ZBAF20	42	32.137	-59.02	14	82.8
H-QK3L	42	35.471	-34.95	14.1	621
H-ZF6	43.2	51.2	-71.28	4	221.7
H-QK3L	44	37.026	-239.30	8	88.7
H-ZF6	45	48.91	-87.90	5	136.7
H-K9L	48.5	72.44	-150.31	4.5	265.57
H-ZK11	49	32.81	-104.23	11.4	70.6
H-K9L	50.5	81.75	-145.88	4	352.64
H-K9L	58	107.15	-477.00	7	265.1
F4	59	1267.1	-266.16	5	544
H-K9L	60	39.72	-142.41	13.8	102
H-K9L	60.274	66.37	-178.49	10.66	198
H-K9L	60.274	122.987	-424.51	10.66	331
H-ZF2	74	65.851	-121.34	9	201
H-ZBAF21	76	157.04	-306.97	6	437
H-K9L	81	203.7	-2773.00	9.96	424.84
H-LAK7	104	181.59	-320.37	12	567.4
H-K9L	106	110.1	-257.80	11.3	362.4

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