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N-BK7 Windows and H-K9L Windows
Made from BK7 material, which has transparent range from 330-2100nm. The refractive index is 1.5168 at 587.6nm. The BK7 window has good performance over visible and near IR spectrum for most application.
High Precision Achromatic Waveplate
Achromatic Waveplate Achromatic Waveplates(Retarders), AWP is composed of one piece of Crystal Quartz and one piece of Magnesium Fluoride, MgF2.
IR Windows Barium Fluoride BaF2 Window
Barium fluoride (BaF2) shows good optical transmission over UV-IR windows in 0.15μm~12.5μm.
IR Windows Magnesium Fluoride MgF2 Windows
MgF2 windows are used in the UV, visible and IR ranges, with approximately 94% transmission from 200 - 1000 nm, and approximately 95% transmission from 1-6µm
IR Windows Calcium fluoride CaF2 Windows
CaF2 has transparent range from 170-7800nm. The refractive index is 1.399 at 5000nm. 1. Low absorption coefficient 2. High damage threshold, 3. Low Dispersion (with an Abbe Number of 95) 4. Low fluorescence 5. Excellent water, chemical, and heat resistance

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Positive meniscus lenses and Negative meniscus lenses

Positive meniscus lenses is convex-concave lens thicker at the center than at the edges, which frequently used for beam focusing applications.

Negative meniscus lenses is convex-concave lens thinner at the center than edges, which frequently used for beam expanding applications.

product orgin:
China
shipping port:
Fuzhou China
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Positive meniscus lenses and Negative meniscus lenses

Positive meniscus lenses is convex-concave lens thicker at the center than at the edges. They are used to minimize spherical aberration. When used in combination with another lens, it’s will shorten the focal length, and increase the NA of system.

1. Frequently Used for Beam Focusing Applications
2. Minimizes the Increase in Spherical Aberrations for Multi-Element Systems

Negative meniscus lenses is convex-concave lens thinner at the center than edges. They increase the divergence of the beam without introducing any significant spherical aberration. When used in combination with another lens, they will increase the focal length, and decrease the NA of the system.

1. Frequently Used for Beam Expanding Applications
2. Minimizes the Increase in Spherical Aberrations for Multi-Element Systems

Specification:

Material:	Grade A optical glass or Fused Silica
Dimension Tolerance:	±0.1mm(Standard), ±0.05mm(High Precision)
Center Thickness Tolerance:	±0.1mm(Standard), ±0.05mm(High Precision)
Paraxial Focal Length:	±2%
Surface quality:	60/40(Standard), 20/10(High Precision)
Clear Aperture:	>85%
Surface Figure:	λ/2(Standard), λ/4(High Precision) @633nm
Centration:	3 arc minutes
Bevel:	<0.25mm×45°
Coating:	Upon requirement

Note for Spherical Lens:
a. Other optical glass materials from Schott, Ohara, Hoya or Chinese CDGM, UVFS from Heraeus, Corning, Germanium, Silicon, ZnSe, ZnS, CaF2, Sapphire are also available upon request .
b. Custom-made Spherical Lenses at any size from diameter 1.0 to 300mm are available upon request.

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Negative Meniscus Lenses Positive Meniscus Lenses

Typical Sizes
Item No.	Φ(mm)	f(mm)	R1(mm)	R2(mm)	Tc(mm)	Te(mm)	Fb(mm)
Material	N-BK7
MNP201	25.4	100	33.42	89.95	4	2.39	96.01
MNP202	25.4	150	42.36	89.95	4	2.95	145.2
MNP203	25.4	200	48.75	89.95	3.5	2.72	194.51
MNP204	25.4	250	83.95	235.5	3.5	2.88	245.97
MNP205	25.4	300	94.19	235.5	3.5	2.98	296.27
MNP206	25.4	400	110.92	235.5	3.5	3.11	396.06
MNP207	25.4	500	124.17	235.5	3.5	3.19	496.16
MNP208	25.4	1000	278.34	600	3.5	3.3	993.7
MNN201	25.4	-100	89.95	32.51	3	4.68	-98.79
MNN202	25.4	-150	89.95	41.21	3	4.11	-148.06
MNN203	25.4	-200	89.95	47.64	3	3.82	-197.82
MNN204	25.4	-250	235.5	83.18	3.5	4.13	-248.62
MNN205	25.4	-300	235.5	93.33	3.5	4.03	-299.04
MNN206	25.4	-400	235.5	109.65	3.5	3.9	-397.33
MNN207	25.4	-500	235.5	122.74	3.5	3.82	-496.94
MNN208	25.4	-1000	600	277.16	3	3.1	-995.3

tags : Convex And Concave Lenses Glass Negative Meniscus Lenses Glass Positive Meniscus Lenses Convex-concave Lenses Beam Focusing Lenses Beam Expanding Lenses

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