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Bi - Concave Lenses

Focal length ranges from -30 to -1000 mm
Available Uncoated or with Single layer MgF2 / Broadband AR coating

These lenses have spherical concave surfaces on both sides. Holmarc manufactures many of these lenses as standard products. These lenses find applications in diverging light or in increasing focal length of an optical system. Our bi-concave lenses are available in three options; uncoated, single layer MgF2 and broadband AR coated.



    Material :     BK7 or equivalent
    Effective Focal Length Tolerance :     ± 1%
    Diameter Tolerance :     + 0.0, - 0.2 mm
    Centering Tolerance :     ≤ 3 arc min
    Surface Quality :     40 - 20 (scratch-dig)
    Clear Aperture :     > 90% of Diameter
    Design Wavelength :     587.6 nm
    Coating :     Uncoated / Single layer MgF2 / Broadband AR
    Center thickness, tc :     2.5 mm








Model No. Diameter
D (mm)
Focal Length
F (mm)
Uncoated Single Layer MgF2 Broadband AR
HO-BVL25-1.2 HO-BVL25-1.2C HO-BVL25-1.2B 25 -30
HO-BVL25-1.6 HO-BVL25-1.6C HO-BVL25-1.6B 25 -40
HO-BVL25-02 HO-BVL25-02C HO-BVL25-02B 25 -50
HO-BVL25-3.2 HO-BVL25-3.2C HO-BVL25-3.2B 25 -80
HO-BVL25-04 HO-BVL25-04C HO-BVL25-04B 25 -100
HO-BVL25-06 HO-BVL25-06C HO-BVL25-06B 25 -150
HO-BVL25-08 HO-BVL25-08C HO-BVL25-08B 25 -200
HO-BVL25-12 HO-BVL25-12C HO-BVL25-12B 25 -300
HO-BVL25-20 HO-BVL25-20C HO-BVL25-20B 25 -500
HO-BVL25-40 HO-BVL25-40C HO-BVL25-40B 25 -1000
HO-BVL50-1.6 HO-BVL50-1.6C HO-BVL50-1.6B 50 -80
HO-BVL50-02 HO-BVL50-02C HO-BVL50-02B 50 -100
HO-BVL50-03 HO-BVL50-03C HO-BVL50-03B 50 -150
HO-BVL50-04 HO-BVL50-04C HO-BVL50-04B 50 -200
HO-BVL50-06 HO-BVL50-06C HO-BVL50-06B 50 -300
HO-BVL50-10 HO-BVL50-10C HO-BVL50-10B 50 -500
HO-BVL50-20 HO-BVL50-20C HO-BVL50-20B 50 -1000
Price List

Uncoated Price ($) In Stock Single Layer MgF2 Price ($) In Stock Broadband AR Price ($) In Stock
HO-BVL25-1.2 24.00 Buy HO-BVL25-1.2C 29.00   HO-BVL25-1.2B 32.00  
HO-BVL25-1.6 24.00 Buy HO-BVL25-1.6C 29.00   HO-BVL25-1.6B 32.00  
HO-BVL25-02 23.00 Buy HO-BVL25-02C 28.00   HO-BVL25-02B 31.00  
HO-BVL25-3.2 22.00 Buy HO-BVL25-3.2C 27.00   HO-BVL25-3.2B 30.00  
HO-BVL25-04 21.00 Buy HO-BVL25-04C 26.00   HO-BVL25-04B 29.00  
HO-BVL25-06 20.00 Buy HO-BVL25-06C 25.00   HO-BVL25-06B 28.00  
HO-BVL25-08 19.00 Buy HO-BVL25-08C 24.00   HO-BVL25-08B 27.00 Buy
HO-BVL25-12 18.00 Buy HO-BVL25-12C 23.00   HO-BVL25-12B 26.00 Buy
HO-BVL25-20 17.00 Buy HO-BVL25-20C 22.00   HO-BVL25-20B 25.00 Buy
HO-BVL25-40 17.00   HO-BVL25-40C 22.00   HO-BVL25-40B 25.00  
HO-BVL50-1.6 31.00   HO-BVL50-1.6C 36.00   HO-BVL50-1.6B 39.00  
HO-BVL50-02 30.00 Buy HO-BVL50-02C 35.00   HO-BVL50-02B 38.00  
HO-BVL50-03 30.00   HO-BVL50-03C 35.00   HO-BVL50-03B 38.00  
HO-BVL50-04 29.00   HO-BVL50-04C 34.00   HO-BVL50-04B 37.00  
HO-BVL50-06 28.00 Buy HO-BVL50-06C 33.00   HO-BVL50-06B 36.00  
HO-BVL50-10 26.00   HO-BVL50-10C 31.00   HO-BVL50-10B 34.00  
HO-BVL50-20 26.00   HO-BVL50-20C 31.00   HO-BVL50-20B 34.00  


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