Optical High Quality Achromatic Lenses for Telescope From China Factory

• After-sales Service: Forever
• Warranty: Forever
• Usage: as Requested
• Type: Glued Lenses
• Transmittance: >95%
• Shape: Customized
• Model NO.: VY-Y0011
• Material: Optical Glass
• Lenses Color: Clear
• Certification: RoHS, ISO9001
• Customized: Customized
• Coating: Customized
• Dia. 25.4mm: 1 Inch
• Transport Package: as Requested
• Specification: RoHS
• Trademark: VY or OEM
• Origin: China
• HS Code: 9001909090
• Production Capacity: 300000

Product Description

>> Product Description
     An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths into focus on the same plane. 
     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 aberration at the design wavelengths, spherical aberration and coma are greatly reduced. 
    VY Optics Photoelectric Technology Co., Ltd. Supply all kinds of achromatic lens as per your requested. 



>> 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)

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.

>> 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: 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.