Cylindrical lens

Optical device

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Cylindrical lenses.

A cylindrical lens is a lens which focuses light into a line instead of a point as a spherical lens would. The curved face or faces of a cylindrical lens are sections of a cylinder, and focus the image passing through it into a line parallel to intersection of the surface of the lens and a plane tangent to it along the cylinder's axis. The lens converges or diverges the image in the direction perpendicular to this line, and leaves it unaltered in the direction parallel to its cylinder's axis (in the tangent plane).

A toric lens combines the effect of a cylindrical lens with that of an ordinary spherical lens.

The Cylindrical rod can magnify only those linear dimensions which are perpendicular to its axis, and cannot magnify linear dimensions which are parallel to its axis.

If a thin cylindrical rod is placed on a ruled white paper with the axis of the rod making an angle θ with the ruled lines, the lines will appear broken and tilted at some angle α as shown in the figure, the Refractive Index of the rod can be given as : [1]

Uses

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Uses in optometry

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• Cylindrical lenses are prescribed to correct astigmatism.[2]
• Cross cylinder, which is a combination of two cylindrical lenses with equal strength and opposite power, is used in subjective refraction to diagnose astigmatism, and assess the strength and axis of the astigmatic power etc.[3]
• Maddox rods, made up of cylindrical lenses arranged in parallel, are used to detect strabismus and diplopia.[4]

Other uses

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• In a light sheet microscope, a cylindrical lens is placed in front of the illumination objective to create the light sheet used for imaging.
• Cylindrical lenses are used in optical spectrometers.[5]
• Cylindrical lenses are used in holography.[6]
• Doublet cylinder lens system is used in optical coherence tomography.[7]
• Cylinder lenses are also used in many laser applications. A cylindrical lens can be used to create a laser line. A doublet cylinder lens is used to make laser sheets and circularize elliptical beams from laser diodes.[8]

See also

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References

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Other Sources

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• Jacobs, Donald H. Fundamentals of Optical Engineering. MC Graw-Hill Book Co., .

• Cylindrical lenses at Wikimedia Commons

Cylindrical lenses are used to focus, expand or condense light into a single dimension. Cylindrical lenses are widely used in laser scanners, optical information processing and computing, dye lasers or anamorphic lenses. Hyperion Optics has decade of cylindrical lenses manufacturing experience, ranging from ordinary plano-convex, plano-concave to cemented achromatic cylindrical lenses.

For most laser applications, Hyperion Optics&#; cylindrical lenses offer always comes with competency in price; our monthly capability is 3,000 pcs. For prototyping quantity, we provide interferometry report along with the shipment upon request.

In addition, Hyperion Optics has been working closely to innovators and photography equipment designers who develop customized anamorphic systems where use cylindrical lenses as image aspect ratio changer, such as attach-on anamorphic lenses for smart phones, anamorphic cinema projection system, and front mounted anamorphic attachment. Please check out our anamorphic lenses for more information. If you are in the stage of developing your own anamorphic lenses, don&#;t hesitate contacting one of our optical engineers for free consultation to receive assistant from manufacturing perspective.

At Hyperion optics, We keep utilizing optical edging technique for most demanding requirement, which is essential in cylindrical component manufacturing. We provide full inspection data along with shipment including Zygo interferometry report and centering testing results.

Cylindrical Lenses

COMMERCIAL GRADE

FACTORY STANDARD

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PRECISION GRADE

Size Tolerance Length/Width(mm)

+0/-0.30

+0/-0.25

+0/-0.25

Diameter (mm)

+0/-0.15

+0/-0.10

±0.025

Wedge (along axis)

5 mrad

3 mrad

1 mrad

Focal Length Tolerance (%)

±2%

±2%

±1%

Cosmetic(MIL-C-A)

80-50

60-40

10-5

Irregularity (Lambda @ 632.8nm)

1 L

1/2 L

1/10 L

Centration (Arc min)

<5'

<3'

<1'

Coating (T% avg)

99%

99.5%

99.5%

Materials

Optical Glasses Depends On Design

If you want to learn more, please visit our website Cylindrical Lens Glasses.