Optical glass N-BK7 350-2200nm Double Concave Spherical Lens
Optical glass N-BK7350-2200nm Double Concave Spherical Lens
A bicongravure lens, which diverts light rays, has a negative focal length and consists of two concave surfaces with the same curvature. It is used for beam expansion, projection, and focal length of optical systems.
Map optics technology provides uncoated, coated anti - reflection film of double - concave mirror sheet.
Anti-reflection membrane options include UV, VIS, NIR, and SWIR.
Germanium, silicon, or zinc selenide substrates are suitable for infrared applications, while fused quartz is suitable for uv applications.
Conventional parameters
| Product name | Double Concave Spherical Lens |
| Material | N-BK7 |
| Dimension Tolerance | +0.0/-0.2mm |
| Thickness Tolerance | ±0.2mm |
| Design Wavelength | 10.6μm |
| Surface Quality | 60/40 scratch and dig |
| Clear Aperture | >90% |
| Flatness | N<3(0.5)@632.8nm |
| Centration | <3 arc minutes |
| Focal Length Tolerance | ±2% |
| Chamfer | Protective<0.5mmx45° |
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Packing Details :Use Good and Strong Cartons to pack
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FAQ
Q: What are your main products?
A: Optical lens,mirrors,windows,filters,prisms
Q: How long is your delivery time?
A: In general delivery time is about one month for custom produced optics.except stock ones or some special optics.
Q: Do you provide samples ? is it free or extra ?
A: We can provide free samples if we have stock optics as your request,while custom produced samples are not free.
Q:What is your MOQ ?
MOQ is 10pcs for most of the optics, while MOQ could be only one piece if you need a element in big dimention.
Q: What is your terms of payment ?
T/T,L/C,VISA,Paypal,Alipay or Negotiation.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.