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Biconcave Lens

Biconcave Lens

The biconcave lens, also named biconcave spherical lens, is usually made of flint glass and used for beam divergence. It’s focal length is negative but the parallel incident ray diverges outward. The two sides of the biconcave lens curvature radius can be equal or not. Combined with plano-convex lens, it is generally used in beam expanders, projection optical systems and optical viewers, etc.

    Biconcave Lens

    ALHAZEN can not only customize the common biconcave spherical lens of N-BK7 or fused quartz, but also customize biconcave spherical lens of any glass material.

    Product Parameter

    ●MaterialOptical Glass
    ●Surface Flatness< λ/5 @ 633nm
    ●Scratch/Dig< 40/20 (both sides)
    ●Eccentricity≤ 1arcmin
    ●Focal Length Tolerance< ± 1%
    ●Diameter Tolerance< + 0.00/ - 0.02mm
    ●Thickness Tolerance< ± 0.05
    ●Clear Aperture≥ 95% of diameter
    ●CoatingAR OR BBAR
    ●Diameter Range5~260mm

    Sample Drawing

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    Productive Capacity

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    Custom &OEM Process

    Company introduction

    Q&A

    Q1:Are you a factory?
    Yes, we are a professional manufacturer of optical components, we have more than20 years experience in optical cold working.
     
    Q2:What is the MOQ of your products?
    No MOQ for customer if our productis in stock,or 1-10pcs.
     
    Q3:Can I custom the products based on my requirement?
    Yes, we can custom the material, specifications and optical coating for your optical components as your requirement.
     
    Q4:How canI get sample from you?
    Just send us your requirements, then we will send samples accordingly.
     
    Q5:How many days will samples be finished? How about mass products?
    Generally, we need 1-2 days to finish the sample production. As for the mass products, it depends on your order quantity.
     
    Q6:What's the delivery time?
    (1) For inventory: the delivery time is 1-3 working days.
    (2) For customized products: the delivery time is 7 to 25 working days According to the quantity.
     
    Q7:How do you controlthe quality?
    More than four times quality inspect during production process, we can provide the Quality test report.
     
    Q8:How about your optical lens production ability per Month?
    About 20000pcs/Month.According to the detail requirement.
     
    Q9:What is your payment term? 
    T/T or L/C,if you want any other way,please contact us.

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    payment

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