SIGMAKOKI

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S-DLB
Diameter φD
Focal length f
Edge Thickness te
Center Thickness tc
Back focal length fb
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An economic general use achromatic lens suitable for an optical system, which does not require high surface quality imaging such as a microscope lens or 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.

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Attention

▶Achromatic lens is used when focusing an image at infinity or when making the point light source to collimated light. It does not provide sufficient optical performance when used in such as short-range imaging.
▶There is a direction of the incident parallel light with achromatic lens. The radius of curvature is allowed to be incident parallel light from the side of (the surface indicated by arrows) small curvature surface. If the parallel light incidents from the opposite side, then spherical aberration and chromatic aberration occur and the focused spot size will be large.

Common Specifications
MaterialBK7, SF2
Design wavelengthBlue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Centration<3′
CoatingAntireflection Coating for the Visible
CementUltraviolet Hardened Adhesive
Surface Quality (Scratch-Dig)60-40
Clear aperture90% of the diameter
Laser Damage Threshold0.3J/cm2 
(Laser pulse width 10ns, repetition frequency 20Hz)
Outline Drawing

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Schematic

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Incident direction of the parallel light

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Spec
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Part Number
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    JP Yen Stock Qty
S-DLB-10-20PM
S-DLB-10-25PM
S-DLB-10-40PM
S-DLB-10-50PM
S-DLB-10-100PM
S-DLB-15-25PM
S-DLB-15-30PM
S-DLB-15-40PM
S-DLB-15-50PM
S-DLB-15-80PM
S-DLB-15-100PM
S-DLB-20-30PM
S-DLB-20-40PM
S-DLB-20-50PM
S-DLB-20-60PM
S-DLB-20-70PM
S-DLB-20-80PM
S-DLB-20-100PM
S-DLB-20-120PM
S-DLB-20-150PM
S-DLB-20-200PM
S-DLB-25-50PM
S-DLB-25-70PM
S-DLB-25-100PM
S-DLB-25-120PM
S-DLB-25-150PM
S-DLB-30-60PM
S-DLB-30-100PM
S-DLB-30-120PM
S-DLB-30-150PM
S-DLB-30-200PM
S-DLB-30-300PM

φ10mm

20.0mm

5.1mm

6.7mm

16.6mm

φ10mm

25.0mm

4.9mm

6.1mm

22.1mm

φ10mm

40.0mm

4.6mm

5.3mm

37.5mm

φ10mm

50.0mm

4.4mm

5mm

47.5mm

φ10mm

100.5mm

4.2mm

4.5mm

98.1mm

φ15mm

25.2mm

6mm

8.8mm

20.7mm

φ15mm

30.1mm

5.7mm

8mm

26.0mm

φ15mm

40.1mm

5.2mm

6.9mm

36.5mm

φ15mm

50.1mm

5mm

6.3mm

47.1mm

φ15mm

79.9mm

4.7mm

5.5mm

77.1mm

φ15mm

100.0mm

4.5mm

5.2mm

97.3mm

φ20mm

30.6mm

6.8mm

10.9mm

24.9mm

φ20mm

40.1mm

6.2mm

9.2mm

35.3mm

φ20mm

50.2mm

5.7mm

8.1mm

46.0mm

φ20mm

60.2mm

5.4mm

7.4mm

56.6mm

φ20mm

70.1mm

5.2mm

6.9mm

66.7mm

φ20mm

79.9mm

5.1mm

6.6mm

76.6mm

φ20mm

99.5mm

4.9mm

6.1mm

96.4mm

φ20mm

120.3mm

4.7mm

5.7mm

117.3mm

φ20mm

149.8mm

4.6mm

5.4mm

147.0mm

φ20mm

200.1mm

4.5mm

5.1mm

197.3mm

φ25mm

50.1mm

7.1mm

10.9mm

44.9mm

φ25mm

69.9mm

6.3mm

9mm

65.3mm

φ25mm

100.2mm

5.9mm

7.7mm

96.5mm

φ25mm

119.8mm

5.6mm

7.2mm

116.2mm

φ25mm

149.6mm

5.5mm

6.7mm

146.2mm

φ30mm

60.3mm

8.1mm

12.6mm

53.9mm

φ30mm

100.7mm

6.8mm

9.5mm

96.0mm

φ30mm

120.1mm

6.6mm

8.8mm

115.7mm

φ30mm

150.0mm

6.3mm

8.1mm

146.0mm

φ30mm

200.2mm

6mm

7.3mm

196.4mm

φ30mm

300.4mm

5.7mm

6.6mm

296.9mm

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¥4,050

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¥3,600

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¥3,350

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¥3,150

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¥5,850

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¥5,400

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¥4,950

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¥4,950

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¥4,050

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¥3,600

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¥6,750

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¥6,300

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¥5,850

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¥5,400

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¥4,950

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RoHS  

¥4,500

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RoHS  

¥4,050

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¥4,050

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¥4,050

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¥4,050

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¥6,750

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¥5,850

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¥4,950

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¥4,950

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¥4,950

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¥7,200

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¥5,400

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¥5,400

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¥5,400

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¥5,400

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¥5,400

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