Powell Lenses

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A Powell Lens Mounted on a

A Powell Lens Mounted on a K6XS 6-Axis Kinematic Mount Using the K6A1 Prism Mount Accessory

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Uniform Laser Line Produced by a Powell Lens (Top) and Gaussian Laser Line Produced by a

Uniform Laser Line Produced by a Powell Lens (Top) and Gaussian Laser Line Produced by a Cylindrical Lens (Bottom)

Features

• Designed for Ø0.8 mm (1/e2) Collimated Input Beams with Gaussian Intensity Distributions
• Divergence Fan Angle at 633 nm: 30°, 45°, 60°, or 75°
• Line Intensity Variation Less Than 30% for 633 nm Input (See Specs Tab for Details)
• Antireflection (AR) Coated for 400 nm to 700 nm

Powell Lenses, also known as laser line generating lenses, create straight, uniform laser lines by fanning out collimated beams in one dimension. The apex of each lens below features an acylindric curve that evenly redistributes the optical power of a Ø0.8 mm (1/e2), 633 nm gaussian input beam into a projected line with less than 30% intensity variation over the line's central 80% (see the Specs tab for typical performance graphs). This can be contrasted with standard cylindrical lenses, which produce diverging laser lines with Gaussian intensity profiles, as seen in the image to the right. Fan angles of 30°, 45°, 60°, or 75° are available.

To achieve the Ø0.8 mm 1/e2 input beam diameter using a fiber-coupled light source, we recommend our F230FC-B or F230SMA-B 633 nm fixed-focus collimation package. Inputs with other wavelengths or beam diameters may cause nominal variance in the performance of the lens.

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Each laser line generator lens is produced from N-SF6 glass and has a square output face. Using a form factor based on a cube, rather than a cylinder, provides a reference surface when aligning the output laser line. An antireflection (AR) coating applied to the roof and square output face provides <2% average reflectance per surface from 400 nm to 700 nm.

Mounting Options
These lenses can be mounted in a variety of ways, depending on the accuracy required for the application. For situations that require a small footprint, the PCM post clamp mount can be used in conjunction with the PCMP flat base adapter to place the Powell lens on the end of a Ø1/2" optical post. The KM100C and KM100CL adjustable kinematic mounts can add tip-tilt actuation that assists in pointing the input beam directly at the center of the Powell lens. When using either the KM100C or KM100CL mounts, be sure to mount the lens such that the fan opens parallel to the mounting clamps to avoid beam clipping. For maximum directional control, the K6XS 6-axis locking kinematic mount can be used with a K6A1 prism mounting accessory, as shown above. With their small size and square cross-section, our Powell lenses are also suitable for glue-in-place OEM applications. For more information on the importance of proper alignment when using a Powell lens, see the Application tab.

220.00 USD ' 375.00 USD

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