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Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications

    Buy cheap Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications from wholesalers
     
    Buy cheap Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications from wholesalers
    • Buy cheap Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications from wholesalers
    • Buy cheap Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications from wholesalers
    • Buy cheap Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications from wholesalers

    Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications

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    Brand Name : LONGWAY
    Model Number : LW1609201411
    Certification : ISO9001
    Price : NEGOTIATION
    Payment Terms : D/P,T/T,Western Union
    Supply Ability : 35000 Piece/Month
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    Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications



    Optical Double Concave Lens AR Coated for Camera/Projector/Telescope Applications

    1. Material

    • Core: Precision-crafted from high-grade optical glass (e.g., BK7, Fused Silica) or specialized optical plastics.

    • Coating: Multi-layer Anti-Reflection (AR) coating deposited onto both concave surfaces. Common coating types target specific wavelength ranges (e.g., Visible: 400-700nm, NIR).


    2. Key Properties

    • Shape: Features two inward-curving (concave) surfaces, causing light rays to diverge.

    • Focal Length: Has a negative focal length (e.g., -25mm, -50mm, -100mm).

    • Optical Power: Acts as a diverging lens.

    • AR Coating Effect: Significantly reduces surface reflections (often to <0.5% per surface), increases light transmission (typically >98% per surface in target band), minimizes ghosting/flare, and improves contrast.


    3. Primary Function

    • To diverge incident light rays. Parallel rays entering the lens spread out as if originating from a virtual focal point in front of the lens.

    • To correct optical aberrations, particularly in compound lens systems (e.g., compensating for convergence/spherical aberration caused by positive lenses).

    • To increase the effective focal length of optical systems when placed before a primary lens.

    • To reduce overall system length in some designs.


    4. Critical Applications

    • Cameras: Used in telephoto lens groups to extend focal length; in zoom mechanisms; for aberration correction; and as field flatteners. AR coating is vital for image clarity and light efficiency.

    • Projectors: Essential for beam expansion, aberration correction (especially in projection lenses), and focal length adjustment within illumination and projection paths. AR coating maximizes brightness and contrast.

    • Telescopes: Employed in eyepieces (e.g., Huygens, Ramsden designs) for magnification and field correction; in Barlow lenses to increase effective focal length/magnification; and for collimation adjustments. AR coating enhances transmission crucial for faint celestial objects.

    • Laser Systems: For beam expansion and optical path control.


    MaterialOptical Glass, Fused Silica, quartz
    Diameter Tolerance+0/-0.15 mm
    Thickness Tolerance+/-0.15 mm
    Cler Apertureover 90%
    Surface Quality80/50~10/5
    Transmissionabove 92%
    Chamfer0.1-0.5 mm x 45°
    Focal Length Tolerance+/-1.5%
    Back Focal Length Tolerance+/-1.5%
    Coatingavailable
    Usageoptical system, photographic sysem, Lighting system e.g. laser, camera, projector, magnifier etc.






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