China Optical Dia 10mm H-K9lH-F4 Achromatic Lens for Telescope

>> Product Description
Achromatic Lenses/cemented lenses/glued lenses/doulets are achromatic consists of a positive low-index Crown Glass lens element cemented to a negative high-index Flint Glass lens element. The elements are chosen so as to cancel chromatic aberration at two well-separated wavelengths, usually in the blue and red region of the spectrum. Focal length is constant at those two wavelengths and focal length shifts are virtually eliminated across the visible wavelengths. One frequent use is to achieve diffraction limited focusing of a laser beam. Negative Achromats are typically used when there is a need to eliminate chromatic aberration. In addition to reducing chromatic
VY Optics Photoelectric Technology Co., Ltd. Supply all kinds of achromatic lens as per your requested.
aberration at the design wavelengths, spherical aberration and coma are greatly reduced.
>> Specification
Specification of our achromatic lens as follow:
*Material: BK7 and ZF2(or according to your request)
*Dia.: +0/-0.05
*Center thickness tolerance: +/-0.1
*Surface quality: 60-40 Scrath/Dig
*Surface figure: 0.5-0.2
*Centration < 3arc min
*Chamfer: 0.1-0.25*45 degrees
*Design wavelength: 486.1mm, 587.6mm, 656.3mm
(the parameter is demision of nomal lens, so specification will be changed according to different demision and material)
Precision of specification we can achieve

Range of diameterDia.0.7mm-Dia.400mmRange of curve radiusR1.5-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 N5, 1 etc.Irregularity ΔN2, 1, 0.5, 0.2 etc.Surface quality60/40, 40/20, 20/10, 10/5 etc.

>> Company Introduction
>> 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:
· We'd like to supply samples for free if we have it in stock, but we don't pay freight.
Q:
· 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:
· Yes, to customize special optical element and coating are available here.
Q:
· T/T, Alibaba online assurance payment, MoneyGram, West Union, Paypal and so on.
Q:
· 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:
· 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.