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) |
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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 |
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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