China Dia25.4mm 425-675nm Coated Optical Positive Achromatic Doublets

Dia25.4mm 425-675nm Coated Optical Positive Achromatic Doublets

CPG optics provides a lot of cemented spheres, as we all know, there are always aberration for singlet, so doublet for triplet even multi-cemented sphere are designed and used in the optical systems, there are spherical aberration. There are several common aberrations: spherical aberration, coma and Chromatic aberration etc

Specification:

Items Description Achromatic DoubletMaterial:Schott N-Balf4 Schott N-LAK12Diameter:25.40+0.0/-0.02mmCenter thickness:9.0+/-0.2mmROC1:16.3701+/-0.20%mm,CCROC2=ROC3:infinityROC4:21.7369+/-0.20%mm,CXFlatness:S1&S2&S3&S4:IRR:0.5fr@632nmSurface quality:S1&S2&S3&S4:40-20Centerness:<3arcminClear Aperture:>D18.0mmChamfer:<0.5mmx45degCoating:S1&S4:AR coating,Ravg<0.4%@425-675nm,AOI=0degStandard:MIL-PRF-13830B

Features:
. Diverge incident light
. Reduce spherical aberration
Descriptions:

Spherical aberration occurs because spherical surfaces are not the ideal shape with which to make a lens, but they are by far the simplest shape to which glass can be ground and polished and so are often used. Spherical aberration causes beams parallel to, but distant from, the lens axis to be focused in a slightly different place than beams close to the axis. This manifests itself as a blurring of the image. Lenses in which closer-to-ideal, non-spherical surfaces are used are called aspheric lenses. These were formerly complex to make and often extremely expensive, but advances in technology have greatly reduced the manufacturing cost for such lenses. Spherical aberration can be minimized by careful choice of the curvature of the surfaces for a particular application: for instance, a Plano-convex lens which is used to focus a collimated beam produces a sharper focal spot when used with the convex side towards the beam source.

Other Lenses CPG handle:

Certificates:

FAQ:
1. What's your payment term?
T/T, Letter of Credit, Paypal, Western Union, etc.
2. What's your minimum order quantity?
1 unit.
3. Could you send free samples?
Your samples fee will be returned when you plack bulk order.
4.What's the delivery time?
15-30 days, it is up to your quantity and soecification and our stock. If in stocks, once you make the payment, your products will be sent within 2 days.
5. What's your price list and discount?
The above price is our reference price, if you would like to know more our exact and discount policy, please contact us directly mobile phone +86 25-85652542
6.Can you OEM or ODM?
Yes, we accept all OEM and ODM.