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SLSQ-10/15/20/25/25.4-N
Diameter φD
Focal length f
Edge thickness te
Back focal length fb
Radius of curvature r
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These simple negative lenses have many uses. Alone they form a virtual image of a distant object or collimated light source. Used in combination with other optics they reduce the power of the system. Sharp edges which are common in negative lenses are removed by beveling in order to reduce the likelihood of chipping.

◦There are three types of plano concave lenses available; synthetic fused silica for wavelengths less than 350nm ultraviolet light, and synthetic fused silica lens for excimer laser wavelengths such as KrF (248nm) and ArF (193nm).
◦Our lenses are listed by outside diameter and focal length to assist your selection according to required specifications.

Related product
Products
Technical Data
Documents/Downloads
Guide

▶Lenses are available in a large selection and in custom sizes and focal lengths.
▶In addition to our standard coating we offer custom anti-reflective coating at specific wavelengths.
▶Please refer to here for Wavelength Characteristic Data (Reference Data, EXCEL file format).

Attention

▶Plano concave lenses are negative lenses that diverge collimated incident light and are primarily used in conjunction with plano convex lenses to shape beams.
▶The plano-concave lens has chromatic aberration, the focal length will vary depending on the wavelength. Please check the “wavelength characteristic of the focal length data” on “Technical Data” for the focal lengths of each wavelength.
▶The plano concave lenses are designed for parallel light to be incident to the concave surface.
▶Transmissions losses due to reflection off the front and rear surfaces of the lens can be minimized by coating the surfaces. Consult our Sales Division for anti-reflection coatings suitable for your application.
▶ Sharpe edges are common in negative lenses are removed by beveling in order to reduce chipping may result in smaller then edge thickness. Thicknesses listed in tables are to theoretical sharp edge.

Common Specifications
MaterialSynthetic fused silica
Design Wavelength546.1nm
Refractive index ne1.46
CoatingUncoated
Clear aperture90% of the diameter
Surface Quality (Scratch-Dig)20-10
Outline Drawing

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Schematic

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Typical Transmittance Data

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T: Transmission
Reference Data
Spec
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Part Number
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SLSQ-10-15N
SLSQ-10-20N
SLSQ-10-25N
SLSQ-10-30N
SLSQ-10-40N
SLSQ-10-50N
SLSQ-10-60N
SLSQ-10-70N
SLSQ-10-80N
SLSQ-10-90N
SLSQ-10-100N
SLSQ-12.7-20N
SLSQ-12.7-25N
SLSQ-12.7-30N
SLSQ-12.7-40N
SLSQ-15-20N
SLSQ-15-25N
SLSQ-15-30N
SLSQ-15-40N
SLSQ-15-50N
SLSQ-15-60N
SLSQ-15-70N
SLSQ-15-80N
SLSQ-15-90N
SLSQ-15-100N
SLSQ-20-25N
SLSQ-20-30N
SLSQ-20-40N
SLSQ-20-50N
SLSQ-20-60N
SLSQ-20-70N
SLSQ-20-80N
SLSQ-20-90N
SLSQ-20-100N
SLSQ-20-120N
SLSQ-20-150N
SLSQ-25-30N
SLSQ-25-35N
SLSQ-25-40N
SLSQ-25-50N
SLSQ-25-60N
SLSQ-25-70N
SLSQ-25-80N
SLSQ-25-90N
SLSQ-25-100N
SLSQ-25-120N
SLSQ-25-150N
SLSQ-25-170N
SLSQ-25-200N
SLSQ-25.4-30N
SLSQ-25.4-35N
SLSQ-25.4-40N
SLSQ-25.4-50N
SLSQ-25.4-60N
SLSQ-25.4-70N
SLSQ-25.4-80N
SLSQ-25.4-90N
SLSQ-25.4-100N
SLSQ-25.4-150N
SLSQ-25.4-200N

φ10mm

−15mm

4.1mm

2mm

−16.4mm

6.9mm

<1′

φ10mm

−20mm

3.5mm

2mm

−21.4mm

9.2mm

<1′

φ10mm

−25mm

3.1mm

2mm

−26.4mm

11.5mm

<1′

φ10mm

−30mm

2.9mm

2mm

−31.4mm

13.8mm

<1′

φ10mm

−40mm

2.7mm

2mm

−41.4mm

18.4mm

<1′

φ10mm

−50mm

2.6mm

2mm

−51.4mm

23mm

<1′

φ10mm

−60mm

2.5mm

2mm

−61.4mm

27.6mm

<1′

φ10mm

−70mm

2.4mm

2mm

−71.4mm

32.2mm

<1′

φ10mm

−80mm

2.3mm

2mm

−81.4mm

36.8mm

<1′

φ10mm

−90mm

2.3mm

2mm

−91.4mm

41.4mm

<1′

φ10mm

−100mm

2.3mm

2mm

−101.4mm

46mm

<1′

φ12.7mm

−20mm

4.5mm

2mm

−21.4mm

9.2mm

<1′

φ12.7mm

−25mm

3.9mm

2mm

−26.4mm

11.50mm

<1′

φ12.7mm

−30mm

3.5mm

2mm

−31.4mm

13.80mm

<1′

φ12.7mm

−40mm

3.1mm

2mm

−41.4mm

18.40mm

<1′

φ15mm

−20mm

5.9mm

2mm

−21.4mm

9.2mm

<1′

φ15mm

−25mm

4.8mm

2mm

−26.4mm

11.5mm

<1′

φ15mm

−30mm

4.2mm

2mm

−31.4mm

13.8mm

<1′

φ15mm

−40mm

3.6mm

2mm

−41.4mm

18.4mm

<1′

φ15mm

−50mm

3.3mm

2mm

−51.4mm

23mm

<1′

φ15mm

−60mm

3mm

2mm

−61.4mm

27.6mm

<1′

φ15mm

−70mm

2.9mm

2mm

−71.4mm

32.2mm

<1′

φ15mm

−80mm

2.8mm

2mm

−81.4mm

36.8mm

<1′

φ15mm

−90mm

2.7mm

2mm

−91.4mm

41.4mm

<1′

φ15mm

−100mm

2.6mm

2mm

−101.4mm

46mm

<1′

φ20mm

−25mm

7.8mm

2mm

−26.4mm

11.5mm

<1′

φ20mm

−30mm

6.3mm

2mm

−31.4mm

13.8mm

<1′

φ20mm

−40mm

5mm

2mm

−41.4mm

18.4mm

<1′

φ20mm

−50mm

4.3mm

2mm

−51.4mm

23mm

<1′

φ20mm

−60mm

3.9mm

2mm

−61.4mm

27.6mm

<1′

φ20mm

−70mm

3.6mm

2mm

−71.4mm

32.2mm

<1′

φ20mm

−80mm

3.4mm

2mm

−81.4mm

36.8mm

<1′

φ20mm

−90mm

3.2mm

2mm

−91.4mm

41.4mm

<1′

φ20mm

−100mm

3.1mm

2mm

−101.4mm

46mm

<1′

φ20mm

−120mm

2.9mm

2mm

−121.4mm

55.2mm

<1′

φ20mm

−150mm

2.7mm

2mm

−151.4mm

69mm

<1′

φ25mm

−30mm

10mm

2mm

−31.4mm

13.8mm

<1′

φ25mm

−35mm

8mm

2mm

−36.4mm

16.1mm

<1′

φ25mm

−40mm

6.9mm

2mm

−41.4mm

18.4mm

<1′

φ25mm

−50mm

5.7mm

2mm

−51.4mm

23mm

<1′

φ25mm

−60mm

5mm

2mm

−61.4mm

27.6mm

<1′

φ25mm

−70mm

4.5mm

2mm

−71.4mm

32.2mm

<1′

φ25mm

−80mm

4.2mm

2mm

−81.4mm

36.8mm

<1′

φ25mm

−90mm

3.9mm

2mm

−91.4mm

41.4mm

<1′

φ25mm

−100mm

3.7mm

2mm

−101.4mm

46mm

<1′

φ25mm

−120mm

3.4mm

2mm

−121.4mm

55.2mm

<1′

φ25mm

−150mm

3.1mm

2mm

−151.4mm

69mm

<1′

φ25mm

−170mm

3mm

2mm

−171.4mm

78.2mm

<1′

φ25mm

−200mm

2.9mm

2mm

−201.4mm

92mm

<1′

φ25.4mm

−30mm

10.4mm

2mm

−31.4mm

13.8mm

<1′

φ25.4mm

−35mm

8.2mm

2mm

−36.4mm

16.1mm

<1′

φ25.4mm

−40mm

7.1mm

2mm

−41.4mm

18.4mm

<1′

φ25.4mm

−50mm

5.8mm

2mm

−51.4mm

23mm

<1′

φ25.4mm

−60mm

5.1mm

2mm

−61.4mm

27.6mm

<1′

φ25.4mm

−70mm

4.6mm

2mm

−71.4mm

32.2mm

<1′

φ25.4mm

−80mm

4.3mm

2mm

−81.4mm

36.8mm

<1′

φ25.4mm

−90mm

4mm

2mm

−91.4mm

41.4mm

<1′

φ25.4mm

−100mm

3.8mm

2mm

−101.4mm

46mm

<1′

φ25.4mm

−150mm

3.2mm

2mm

−151.4mm

69mm

<1′

φ25.4mm

−200mm

2.9mm

2mm

−201.4mm

92mm

<1′

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