Cylindrical Plano-concave Lens (BK7) / CLB-N
Cylindrical plano-concave lens has a concave curvature in the vertical direction and has no curvature in the horizontal direction.When used in combination with a plano-convex cylindrical lens an elliptical shaped beam can be sharped into a circular beam for use in semiconductor and other laser applications.
Plano Concave Cylindrical lenses is available in BK7 for from visible range to infrared wavelength range.BK7 lenses are also available with three types of anti-reflection coatings, visible wavelength range, in the near-infrared range and in the infrared range.
Cylindrical lenses are often used in an optical system to change the shape and aspect ratio of the illumination light beam.
Common Specifications
| Material | BK7 |  |
|---|---|---|
| Design Wavelength | 546.1nm | |
| Refractive index | ne=1.519 | |
| Coating | Uncoated: the end of the part number ‘N’ Anti-reflection coating: the end of the part number ‘NM’, ‘NIR1’, ‘NIR2’ |
|
| Transmittance | Anti-reflection：> Average 99% (Wavelength Range 400 - 700nm: the end of the part number ‘M’) > Average 98.5％ (Wavelength Range 633 - 1064nm: the end of the part number ‘IR1’) > Average 98.5％(Wavelength Range 750 - 1550nm: the end of the part number ‘IR2’) |
|
| Laser Damage Threshold | 4 J/cm2 Laser pulse with 10ns, repetition frequency 20Hz | |
| Clear Aperture | 90% of square or rectangle to actual dimension | |
| Surface Quality (Scratch−Dig) | 20 - 10 |
| How to specify the anti-reflection coating | Specifications | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Uncoated | Visibe 400-700nm |
Near-infrared 633-1064nm |
Infrared 750-1550nm |
A×B | Focal Length ｆ |
Edge Thickness te |
Center Thickness tc |
Back Focal Length fb |
Radius of Curvature r |
|
| CLB-1010-15N | M | IR1 | IR2 | 10×10 | −15 | 4 | 2.2 | −16.4 | 7.79 | |
| CLB-1010-20N | M | IR1 | IR2 | 10×10 | −20 | 3 | 1.7 | −21.1 | 10.38 | |
| CLB-1010-25N | M | IR1 | IR2 | 10×10 | −25 | 3 | 2 | −26.3 | 12.98 | |
| CLB-1010-30N | M | IR1 | IR2 | 10×10 | −30 | 3 | 2.2 | −31.4 | 15.57 | |
| CLB-1010-40N | M | IR1 | IR2 | 10×10 | −40 | 3 | 2.4 | −41.6 | 20.76 | |
| CLB-1020-15N | M | IR1 | IR2 | 10×20 | −15 | 4 | 2.2 | −16.4 | 7.79 | |
| CLB-1020-20N | M | IR1 | IR2 | 10×20 | −20 | 3 | 1.7 | −21.1 | 10.38 | |
| CLB-1020-25N | M | IR1 | IR2 | 10×20 | −25 | 3 | 2 | −26.3 | 12.98 | |
| CLB-1020-30N | M | IR1 | IR2 | 10×20 | −30 | 3 | 2.2 | −31.4 | 15.57 | |
| CLB-1020-40N | M | IR1 | IR2 | 10×20 | −40 | 3 | 2.4 | −41.6 | 20.76 | |
| CLB-1515-20N | M | IR1 | IR2 | 15×15 | −20 | 5 | 1.8 | −21.2 | 10.38 | |
| CLB-1515-25N | M | IR1 | IR2 | 15×15 | −25 | 5 | 2.6 | −26.7 | 12.98 | |
| CLB-1515-30N | M | IR1 | IR2 | 15×15 | −30 | 4 | 2.1 | −31.4 | 15.57 | |
| CLB-1515-40N | M | IR1 | IR2 | 15×15 | −40 | 4 | 2.6 | −41.7 | 20.76 | |
| CLB-1525-20N | M | IR1 | IR2 | 15×25 | −20 | 5 | 1.8 | −21.2 | 10.38 | |
| CLB-1525-25N | M | IR1 | IR2 | 15×25 | −25 | 5 | 2.6 | −26.7 | 12.98 | |
| CLB-1525-30N | M | IR1 | IR2 | 15×25 | −30 | 4 | 2.1 | −31.4 | 15.57 | |
| CLB-1525-40N | M | IR1 | IR2 | 15×25 | −40 | 4 | 2.6 | −41.7 | 20.76 | |
| CLB-2020-25N | M | IR1 | IR2 | 20×20 | −25 | 7 | 2.3 | −26.5 | 12.98 | |
| CLB-2020-30N | M | IR1 | IR2 | 20×20 | −30 | 6 | 2.4 | −31.6 | 15.57 | |
| CLB-2020-40N | M | IR1 | IR2 | 20×20 | −40 | 5 | 2.4 | −41.6 | 20.76 | |
| CLB-2020-50N | M | IR1 | IR2 | 20×20 | −50 | 4 | 2 | −51.3 | 25.95 | |
| CLB-2020-60N | M | IR1 | IR2 | 20×20 | −60 | 4 | 2.4 | −61.5 | 31.14 | |
| CLB-2020-70N | M | IR1 | IR2 | 20×20 | −70 | 4 | 2.6 | −71.7 | 36.33 | |
| CLB-2020-80N | M | IR1 | IR2 | 20×20 | −80 | 4 | 2.8 | −81.8 | 41.52 | |
| CLB-2020-100N | M | IR1 | IR2 | 20×20 | −100 | 4 | 3 | −102.0 | 51.9 | |
| CLB-2020-130N | M | IR1 | IR2 | 20×20 | −130 | 4 | 3.3 | −132.1 | 67.47 | |
| CLB-2020-150N | M | IR1 | IR2 | 20×20 | −150 | 4 | 3.4 | −152.2 | 77.85 | |
| CLB-2020-200N | M | IR1 | IR2 | 20×20 | −200 | 4 | 3.5 | −202.3 | 103.8 | |
| CLB-2020-250N | M | IR1 | IR2 | 20×20 | −250 | 4 | 3.6 | −252.4 | 129.75 | |
| CLB-2020-300N | M | IR1 | IR2 | 20×20 | −300 | 4 | 3.7 | −302.4 | 155.7 | |
| CLB-2030-100N | M | IR1 | IR2 | 20×30 | −100 | 4 | 3 | −102.0 | 51.9 | |
| CLB-2030-130N | M | IR1 | IR2 | 20×30 | −130 | 4 | 3.3 | −132.1 | 67.47 | |
| CLB-2030-150N | M | IR1 | IR2 | 20×30 | −150 | 4 | 3.4 | −152.2 | 77.85 | |
| CLB-2030-200N | M | IR1 | IR2 | 20×30 | −200 | 4 | 3.5 | −202.3 | 103.8 | |
| CLB-2030-250N | M | IR1 | IR2 | 20×30 | −250 | 4 | 3.6 | −252.4 | 129.75 | |
| CLB-2030-300N | M | IR1 | IR2 | 20×30 | −300 | 4 | 3.7 | −302.4 | 155.7 | |
| CLB-2040-25N | M | IR1 | IR2 | 20×40 | −25 | 7 | 2.3 | −26.5 | 12.98 | |
| CLB-2040-30N | M | IR1 | IR2 | 20×40 | −30 | 6 | 2.4 | −31.6 | 15.57 | |
| CLB-2040-40N | M | IR1 | IR2 | 20×40 | −40 | 5 | 2.4 | −41.6 | 20.76 | |
| CLB-2040-50N | M | IR1 | IR2 | 20×40 | −50 | 4 | 2 | −51.3 | 25.95 | |
| CLB-2040-60N | M | IR1 | IR2 | 20×40 | −60 | 4 | 2.4 | −61.5 | 31.14 | |
| CLB-2040-70N | M | IR1 | IR2 | 20×40 | −70 | 4 | 2.6 | −71.7 | 36.33 | |
| CLB-2040-80N | M | IR1 | IR2 | 20×40 | −80 | 4 | 2.8 | −81.8 | 41.52 | |
| CLB-2050-100N | M | IR1 | IR2 | 20×50 | −100 | 4 | 3 | −102.0 | 51.9 | |
| CLB-2050-130N | M | IR1 | IR2 | 20×50 | −130 | 4 | 3.3 | −132.1 | 67.47 | |
| CLB-2050-150N | M | IR1 | IR2 | 20×50 | −150 | 4 | 3.4 | −152.2 | 77.85 | |
| CLB-2050-200N | M | IR1 | IR2 | 20×50 | −200 | 4 | 3.5 | −202.3 | 103.8 | |
| CLB-2050-250N | M | IR1 | IR2 | 20×50 | −250 | 4 | 3.6 | −252.4 | 129.75 | |
| CLB-2050-300N | M | IR1 | IR2 | 20×50 | −300 | 4 | 3.7 | −302.4 | 155.7 | |
| CLB-3030-50N | M | IR1 | IR2 | 30×30 | −50 | 7 | 2.2 | −51.5 | 25.95 | |
| CLB-3030-60N | M | IR1 | IR2 | 30×30 | −60 | 6 | 2.1 | −61.4 | 31.14 | |
| CLB-3030-70N | M | IR1 | IR2 | 30×30 | −70 | 5 | 1.8 | −71.2 | 36.33 | |
| CLB-3030-80N | M | IR1 | IR2 | 30×30 | −80 | 5 | 2.2 | −81.4 | 41.52 | |
| CLB-3030-100N | M | IR1 | IR2 | 30×30 | −100 | 5 | 2.8 | −101.8 | 51.9 | |
| CLB-3030-130N | M | IR1 | IR2 | 30×30 | −130 | 5 | 3.3 | −132.2 | 67.47 | |
| CLB-3030-150N | M | IR1 | IR2 | 30×30 | −150 | 5 | 3.5 | −152.3 | 77.85 | |
| CLB-3030-200N | M | IR1 | IR2 | 30×30 | −200 | 5 | 3.9 | −202.6 | 103.8 | |
| CLB-3030-250N | M | IR1 | IR2 | 30×30 | −250 | 5 | 4.1 | −252.7 | 129.75 | |
| CLB-3030-300N | M | IR1 | IR2 | 30×30 | −300 | 5 | 4.3 | −302.8 | 155.7 | |
| CLB-3040-50N | M | IR1 | IR2 | 30×40 | −50 | 7 | 2.2 | −51.5 | 25.95 | |
| CLB-3040-60N | M | IR1 | IR2 | 30×40 | −60 | 6 | 2.1 | −61.4 | 31.14 | |
| CLB-3040-70N | M | IR1 | IR2 | 30×40 | −70 | 5 | 1.8 | −71.2 | 36.33 | |
| CLB-3040-80N | M | IR1 | IR2 | 30×40 | −80 | 5 | 2.2 | −81.4 | 41.52 | |
| CLB-3050-100N | M | IR1 | IR2 | 30×50 | −100 | 5 | 2.8 | −101.8 | 51.9 | |
| CLB-3050-130N | M | IR1 | IR2 | 30×50 | −130 | 5 | 3.3 | −132.2 | 67.47 | |
| CLB-3050-150N | M | IR1 | IR2 | 30×50 | −150 | 5 | 3.5 | −152.3 | 77.85 | |
| CLB-3050-200N | M | IR1 | IR2 | 30×50 | −200 | 5 | 3.9 | −202.6 | 103.8 | |
| CLB-3050-250N | M | IR1 | IR2 | 30×50 | −250 | 5 | 4.1 | −252.7 | 129.75 | |
| CLB-3050-300N | M | IR1 | IR2 | 30×50 | −300 | 5 | 4.3 | −302.8 | 155.7 | |
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