Optical Lenses/Zinc Selenide Meniscus Lenses/Germanium Meniscus Lenses

• Type: Meniscus Lenses
• Customized: Customized
• Substrate: Schott Borofloat 33 or Equivalent
• Surface Quality: 40-20 Scratch-Dig or Custom Manufacturing
• Surface Flatness: Lambda/10 at 632.8nm with Power Removed
• Coating Type: Dielectric Coating
• Model NO.: RAY-LH057#
• Wavelength Range: 488-694 Nm/700-950nm
• Transport Package: Cartons or Wood Case
• Specification: 12.7mm/25.4mm/50.8mm or custom manufacturing
• Trademark: Raytek
• Origin: China
• HS Code: 9002909090
• Production Capacity: 100000PCS Per Year

Product Description

General introduction:A meniscus lens means that one side of the lens is concave and the other side is convex. The focal length of a meniscus lens can be positive or negative. The meniscus lens can correct the aberration and is usually used as a corrective lens, and can also be used as a condenser of the lighting system, and choosing the appropriate thickness can also eliminate chromatic aberration.

Product Description:Meniscus Lenses are meniscus lenses. This lens has an outer convex mirror surface and an inner concave mirror surface. If the convex curvature is greater than the concave curvature, the lens has a positive focal length and is used as a magnifying glass; if the concave curvature is large and the convex curvature is small, it is a negative meniscus lens, which can be used to replace other negative lenses . Meniscus lenses are used to minimize spherical aberration, and can achieve smaller focal points and less aberrations than plano-convex lenses to improve image quality. When combined with another lens, a positive meniscus lens can shorten the focal length, thereby increasing the numerical aperture (NA) of the system without introducing significant spherical aberration. When used to focus collimated light, the convex surface of the lens should face the light source.

Product material:
1. Zinc Selenide (ZnSe) Meniscus Lenses are meniscus lenses based on zinc selenide:
Zinc selenide is a commonly used optical glass material in the infrared band. The transmission band is 600nm-16μm. It has the characteristics of low absorption and thermal shock resistance. It is often used in thermal imaging systems and can also be used in some visible light optical systems. As a substrate for various optical elements, such as lenses, windows, etc.

Material	CVD Laser Grade Zinc Selenide
Design wavelength	10.6μm
Diameter error	+0.0/-0.1mm
Center thickness error	±0.2mm
Effective focus error	±1%
Lens centering error	<3 arc minutes
Surface finish	40/20~60/40
Chamfer	0.2mmX45°

2. Germanium (Ge) Meniscus Lenses are meniscus lenses based on germanium:
Germanium is a commonly used optical glass material in the infrared band, with a transmission band of 2.0-16μm, and has the characteristics of high refractive index and high Knoop hardness. Germanium is inert to air, water, acid, alkali, etc., and can be used for thermal imaging and infrared imaging in harsh environments.

Material	Germanium
Design wavelength	10.6μm
Diameter error	+0.0/-0.1mm
Center thickness error	±0.2mm
Effective focus error	±1%
Lens centering error	<3 arc minutes
Surface finish	40/20~60/40
Chamfer	0.2mmX45°

Main Cooperation Materials Manufacturers:
CORNING, OHARA, SCHOTT, LEONI, AGC,HELLMA, NIKON,VITRON,C-LASER,ETC

Main Export Countries & Areas:
Usa, Uk, Japan, Germany, Spain, France, Swiss, Korea, Russia, Pakistan, India, Portugal, Canada, New Zealand, Australia, Saudi Arab, Turkey, Finland, Poland ,etc.

Raytekoptics Extra value added services offered:
1). Optical workcraft & process solution design;
2). Rough processing raw materials;
3). Semi finishing raw materials;
4). Fabricate custom sizes and shapes;
5). Design and supply custom coatings;
6). Modify and resurface customer supplied materials;
7). Drill holes, notch glass and provide beveled substrates;
8). Precision polish optics with non-standard aspect ratios;

Payment Method: by T/T or Western Union.
Delivery time: 7-10 days.
Quality Warranty: Ruitaiphotoelectric(Raytekoptics) offers quality warranty for our optics products with "3R" policy. For any inferior-quality products, Ruitaiphotoelectric(Raytekoptics) is responsible for return, replacement and refund.