It is a product with lower quality than DLB series with low surface spherical achromatic lens.

Allowed to use optical system, which is not required high surface quality imaging lens such as the microscope lens and telescope lens.

  • Specification except surface quality is almost the same as DLB series. Except when used in high-precision experiment using a laser, this lens is recommended.
  • It is optimized so that focal length gap is small in the visible light range and the aberration is minimized.
  • It is also corrected for astigmatism and comatic aberration of off-axis as well as aberration of axial object point.
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red 56.3nm
Centration <3′
Coating Antireflection coating
Surface Quality (scratch-Dig) 60-40
Clear aperture 90% of actual aperture
Part number Diameter ØD [MM] Focal length f [MM] Center thickness tc [MM] Edge thickness te [MM] Back focal length fb [MM]
S-DLB-10-20-PM Ø10 20.0 6.7 5.1 16.6
S-DLB-10-25-PM Ø10 25.0 6.1 4.9 22.1
S-DLB-10-40-PM Ø10 40.0 5.3 4.6 37.5
S-DLB-10-50-PM Ø10 50.0 5.0 4.4 47.5
S-DLB-10-100-PM Ø10 100.5 4.5 4.2 98.1
S-DLB-15-25-PM Ø15 25.2 8.8 6.0 20.7
S-DLB-15-30-PM Ø15 30.1 8.0 5.7 26
S-DLB-15-40-PM Ø15 40.1 6.9 5.2 36.5
S-DLB-15-50-PM Ø15 50.1 6.3 5.0 47.1
S-DLB-15-80-PM Ø15 79.9 5.5 4.7 77.1
S-DLB-15-100-PM Ø15 100.0 5.2 4.5 97.3
S-DLB-20-30-PM Ø20 30.6 10.9 6.8 24.9
S-DLB-20-40-PM Ø20 40.1 9.2 6.2 35.3
S-DLB-20-50-PM Ø20 50.2 8.1 5.7 46.0
S-DLB-20-60-PM Ø20 60.2 7.4 5.4 56.6
S-DLB-20-70-PM Ø20 70.1 6.9 5.2 66.7
S-DLB-20-80-PM Ø20 79.9 6.6 5.1 76.6
S-DLB-20-100-PM Ø20 99.5 6.1 4.9 96.4
S-DLB-20-120-PM Ø20 120.3 5.7 4.7 117.3
S-DLB-20-150-PM Ø20 149.8 5.4 4.6 147.0
S-DLB-20-200-PM Ø20 200.1 5.1 4.5 197.3
S-DLB-25-50-PM Ø25 50.1 10.9 7.1 44.9
S-DLB-25-70-PM Ø25 69.9 9.0 6.3 65.3
S-DLB-25-100-PM Ø25 100.2 7.7 5.9 96.5
S-DLB-25-120-PM Ø25 119.8 7.2 5.6 116.2
S-DLB-25-150-PM Ø25 149.6 6.7 5.5 146.2
S-DLB-30-60-PM Ø30 60.3 12.6 8.1 53.9
S-DLB-30-100-PM Ø30 100.7 9.5 6.8 96.0
S-DLB-30-120-PM Ø30 120.1 8.8 6.6 115.7
S-DLB-30-150-PM Ø30 150.0 8.1 6.3 146.0
S-DLB-30-200-PM Ø30 200.2 7.3 6.0 196.4
S-DLB-30-300-PM Ø30 300.4 6.6 5.7 296.9

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