SIGMAKOKI

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SLSQ-30/40/50/50.8-N
Diameter φD
Focal length f
Edge thickness te
Center thickness tc
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-30-35N
SLSQ-30-40N
SLSQ-30-50N
SLSQ-30-60N
SLSQ-30-70N
SLSQ-30-80N
SLSQ-30-90N
SLSQ-30-100N
SLSQ-30-120N
SLSQ-30-150N
SLSQ-30-170N
SLSQ-30-200N
SLSQ-30-220N
SLSQ-30-250N
SLSQ-40-50N
SLSQ-40-60N
SLSQ-40-70N
SLSQ-40-100N
SLSQ-40-120N
SLSQ-40-150N
SLSQ-40-200N
SLSQ-40-250N
SLSQ-50-70N
SLSQ-50-80N
SLSQ-50-90N
SLSQ-50-100N
SLSQ-50-120N
SLSQ-50-150N
SLSQ-50-170N
SLSQ-50-200N
SLSQ-50-220N
SLSQ-50-250N
SLSQ-50-300N
SLSQ-50.8-70N
SLSQ-50.8-80N
SLSQ-50.8-90N
SLSQ-50.8-100N
SLSQ-50.8-150N
SLSQ-50.8-200N
SLSQ-50.8-250N
SLSQ-50.8-300N

φ30mm

−35mm

12.3mm

2mm

−36.4mm

16.1mm

<1′

φ30mm

−40mm

9.7mm

2mm

−41.4mm

18.4mm

<1′

φ30mm

−50mm

7.6mm

2mm

−51.4mm

23mm

<1′

φ30mm

−60mm

6.4mm

2mm

−61.4mm

27.6mm

<1′

φ30mm

−70mm

5.7mm

2mm

−71.4mm

32.2mm

<1′

φ30mm

−80mm

5.2mm

2mm

−81.4mm

36.8mm

<1′

φ30mm

−90mm

4.8mm

2mm

−91.4mm

41.4mm

<1′

φ30mm

−100mm

4.5mm

2mm

−101.4mm

46mm

<1′

φ30mm

−120mm

4.1mm

2mm

−121.4mm

55.2mm

<1′

φ30mm

−150mm

3.7mm

2mm

−151.4mm

69mm

<1′

φ30mm

−170mm

3.5mm

2mm

−171.4mm

78.2mm

<1′

φ30mm

−200mm

3.2mm

2mm

−201.4mm

92mm

<1′

φ30mm

−220mm

3.1mm

2mm

−221.4mm

101.2mm

<1′

φ30mm

−250mm

3mm

2mm

−251.4mm

115mm

<1′

φ40mm

−50mm

13.6mm

2mm

−51.4mm

23mm

<1′

φ40mm

−60mm

10.6mm

2mm

−61.4mm

27.6mm

<1′

φ40mm

−70mm

9mm

2mm

−71.4mm

32.2mm

<1′

φ40mm

−100mm

6.6mm

2mm

−101.4mm

46mm

<1′

φ40mm

−120mm

5.8mm

2mm

−121.4mm

55.2mm

<1′

φ40mm

−150mm

5mm

2mm

−151.4mm

69mm

<1′

φ40mm

−200mm

4.2mm

2mm

−201.4mm

92mm

<1′

φ40mm

−250mm

3.8mm

2mm

−251.4mm

115mm

<1′

φ50mm

−70mm

14.9mm

3mm

−72.1mm

32.2mm

<1′

φ50mm

−80mm

12.8mm

3mm

−82.1mm

36.8mm

<1′

φ50mm

−90mm

11.4mm

3mm

−92.1mm

41.4mm

<1′

φ50mm

−100mm

10.4mm

3mm

−102.1mm

46mm

<1′

φ50mm

−120mm

9mm

3mm

−122.1mm

55.2mm

<1′

φ50mm

−150mm

7.7mm

3mm

−152.1mm

69mm

<1′

φ50mm

−170mm

7.1mm

3mm

−172.1mm

78.2mm

<1′

φ50mm

−200mm

6.5mm

3mm

−202.1mm

92mm

<1′

φ50mm

−220mm

6.1mm

3mm

−222.1mm

101.2mm

<1′

φ50mm

−250mm

5.8mm

3mm

−252.1mm

115mm

<1′

φ50mm

−300mm

5.3mm

3mm

−302.1mm

138mm

<1′

φ50.8mm

−70mm

15.4mm

3mm

−72.1mm

32.2mm

<1′

φ50.8mm

−80mm

13.2mm

3mm

−82.1mm

36.8mm

<1′

φ50.8mm

−90mm

11.7mm

3mm

−92.1mm

41.4mm

<1′

φ50.8mm

−100mm

10.6mm

3mm

−102.1mm

46mm

<1′

φ50.8mm

−150mm

7.8mm

3mm

−152.1mm

69mm

<1′

φ50.8mm

−200mm

6.6mm

3mm

−202.1mm

92mm

<1′

φ50.8mm

−250mm

5.8mm

3mm

−252.1mm

115mm

<1′

φ50.8mm

−300mm

5.4mm

3mm

−302.1mm

138mm

<1′

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