Description
Plano-Concave Lens has a negative focal length and is typically used to cause a collimated beam to diverge as in a Galilean type beam expander or Telescope. Because the spherical aberration of the Plano-Concave is negative, it can be used to balance the aberration of other lenses.This lens is widely use in optical display systems, projection optics systems, imaging and laser measureemnt systerms;
Meniscus Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus Lens is used to increase the focal length of another lens while maintaining the angular resolution of the optical assembly. This lens shape is best used when one conjugate is relatively far from the lens.We supply optical spherical lenses,include plano-convex spherical lens,plano-concave spherical lens,bi-convex spherical lens,bi-concave spherical lens,meniscus spherical lens,special spherical lens etc..
Specification of our plano-convex spherical lenses as follow:
*Material:BK7 or other materials
*Focal length:+/-1%
*Center thickness tolerance:+/-0.01mm
*Centration:1 arc minutes
*Surface Figure:lambda/2 at 633nm on plano side
*Surface quality:40/20 stratch/dig
*Clear Apenture>90%
*Chamfer Protective: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. |
| Material | BK7, sapphire, SF11, Si, Ge and other optical glasses |
| Diameter | 1mm-150mm |
| Dia. Tolerance | 0.001mm - 0.003mm |
| Sphericity | 0.001 |
| Clear Aperture | 95% |
| Surface Quality | 20-10 |
Why Us ?1. Reasonable quotation. We reject unrealistic low prices. As a prerequisite, to ensure the highest quality of lens and offer the reasonable price.
2.Quality assurance. Besides pass the ISO9001 certification, experience team and efficient equipment are the vital guarantee for the product.
3. Timely Delivery. We could ship goods to you in time as lead time we negotiate.
4. Convenient logistics services. We usually cooperate with the famous express logistics company, including 90% regions of the world and ensure the products can delivery to the customers safety and quickly.
LogisticsIn order to make the goods safe fast accurate to your hands, we generally recommend that you choose the international logistics company!
Q: What's the delivery time?(1) For the standard products such as ball lens, powell lens etc.:
For inventory: the delivery is 5 working days after order.
For customized products: the delivery is 2 or 3 working weeks after order.
(2) For the off-standard products, the delivery is 2 or 6 working weeks after you place the order.
Q: How to pay?T/T, Paypal, West Union, MoneyGram, Secure payment etc.
Q: What's the MOQ?(1) For inventory, the MOQ is 1 pc.
(2) For customized products, the MOQ is 10pcs-20pcs.
It depends on the technical parameter.
Q: Do you have inspection report for material?Yes, a inspection report will be supplied, besides, we can also supply ROHS report and reach reports for our products if there is special requirement.
Q: How to ensure the safety of payment?(1) VY Optics is a reputable company, who is keen to build long-term business relationship with you, but not only one time cooperation..
(2) VY Optics is registered in Chinese government department, all our credentials could be checked on internet.
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