Optical N-Bk7 Fused Silica Sapphire Glass Positive Meniscus Lenses

• After-sales Service: Yes
• Warranty: Yes
• Usage: Lighting, Medical, Optical, Photography, Laser
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: M-P21S4T6101Y-210518
• Type: Wedge
• Transmittance: >95%
• Shape: Single-lens
• Material: Znse
• Lenses Color: Yellow
• Certification: RoHS, ISO9001, CE
• Customized: Customized
• Coating: as Request
• Diameter: 6mm
• Dimension Tolerance: +/-0.1mm
• Surface Quality: 60-40
• Size: as Request
• Name: Optical N-Bk7 Glass Positive Meniscus Lenses
• Transport Package: as Request
• Specification: as request
• Trademark: VY
• Origin: Cn
• HS Code: 9001909090
• Production Capacity: 100000
• Package Size: 0.10cm * 0.10cm * 0.10cm
• Package Gross Weight: 0.100kg

Product Description

>> Product Description

What is meniscus lens?

Meniscus lens is a lens which has two spherical curved surfaces, convex on one side and concave on the other side. It is thicker at the center than at the edges. The lens provides a smaller beam diameter in order to reduce the beam waste and spherical aberration.

Types of meniscus lenses

• Positive lenses: Which used in applications that require small focal number, which is less than 2.5. For focal numbers ranging between 2.5 and 10, meniscus lens can minimize spot size and enhance image quality. The concave side of the positive lens has a smaller curvature, and the convex side has a greater curvature.
• Negative meniscus:The lenses which are used for applications using infrared materials with high refractive index. These lenses are used as an alternative to other negative lenses with a greater curvature on the concave side and a smaller curvature on the convex side. They are used in beam expanding applications that require minimal spherical aberration.

Meniscus lenses from VY

Specifiction of our meniscus lens as follow:
*Material: BK7 or other optical materials 
*Dimension Tolerance :+0.0~-0.1mm 
*Center Thickness: +/-0.1mm 
*Focal Length Tolerance:+/-1%
*Surface Quality:40/20
*Surface Figure:lambda/2 at 633nm on plano side 
*Clear Aperture: >90%
*Chamfer: 0.25mm at 45 degree typical 
*Coating: Optional 

 

Range of diameter	Dia.0.7mm-Dia.400mm
Range of curve radius	R1.5-R∞ etc.
Tolerance of diameter	+/-0.1, +/-0.01, +/-0.005 etc.
Surface accuracy	λ , 1/2λ , 1/4λ , 1/10λ  etc.
Tolerance of Thickness	+/-0.1, +/-0.05, +/-0.01 etc.
Centration	+/-2′, +/-1′ etc.
Aperture N	5, 1 etc.
Irregularity ΔN	2, 1, 0.5, 0.2 etc.
Surface quality	60/40, 40/20, 20/10, 10/5 etc.

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>> Related Products
     VY Optics could also manufacture and design other optical elements, including achromatic lens, dome lens, filter, prism, ball lens, cylindrical lens, optical mirrors, spherical lens and rod lens, we can fabricate high-precision lens as per your requested.


>> FAQ
Q: Do you provide samples? Is it free or charged?
 ·  We'd like to supply samples for free if we have it in stock, but we don't pay freight.
Q: How long is your delivery time?
 ·  Regarding inventory, it is 3 working days;
 ·  For customized one, it's about 15-25 working days, depended on exact quantity and order date.
Q: Is it possible to customize special lens?
 ·  Yes, to customize special optical element and coating are available here.
Q: How to pay?
 ·  T/T, Alibaba online assurance payment, MoneyGram, West Union, Paypal and so on.
Q: How to ensure the safety of payment?
 ·  VY Optics is a reliable supplier not only audited on Alibaba, but also on Made-in-China, reputation and quality is life of our company, and we support Alibaba Trade Assurance.
Q: How do you ship goods?
 · Low value sample: EUB, E Express of China Post, which is cheap;
 · Light weight parcel: DHL, FedEx, TNT, UPS, EMS, SF Express, China Post;
 · Heavy cargo: by air or by sea, ship on pallet.
Our company enjoy a considerable discount owing to long-term cooperation with courier company.