• Focus Light in One Direction with Minimal Chromatic Aberration
• Pre-Mounted Round Ø1" Design for Ease of Use
• Produces Line Focus
• Design Wavelengths for Visible Doublets: 486.1, 587.6, 656.3 nm

This Thorlabs' cylindrical achromatic doublet is used to focus polychromatic light in one direction only while minimizing chromatic aberration. This creates a line focus rather than a point focus, as seen in spherical lenses. Our cylindrical achromatic doublet is pre-mounted in Ø1" housings for ease of use. The housings are engraved with part number, coating range, focal length, an arrow indicating the direction the lens should face to collimate a line source, and an infinity symbol indicating that this lens has an infinite conjugate ratio.

Cylindrical lenses are desirable for various experimental setups, including beam shaping, laser projection, and holography. Cylindrical doublets drastically reduce chromatic aberration, and can produce a diffraction limited focus in one direction when used with monochromatic light. Thorlabs' offers Cylindrical Achromatic Doublets with standard anti-reflective coatins. The coating is applied to both outer surfaces.

• AR Coating Range: 350 - 700 nm
• Coating Performance: R_avg<0.5%
• Diameter Tolerance: +0.00/-0.10 mm
• Focal Length Tolerance: ±1%
• Center Thickness Tolerance: ±0.10 mm
• Surface Irregularity: λ
• Surface Quality: 40-20 Scratch Dig
• Centration: ≤5 arcmin
• Clear Aperture: Ø21 mm
• Power Tolerance: 3 Fringes
• Operating Temperature: -40 to 85 °C
• D: 25.4 mm
• f: 250 mm
• f_b: 246.2 mm
• R₁: 191.1 mm
• R₂: 90.0 mm
• R₃: 233.3 mm
• T: 13.8 mm
• WD: 244.9
• Materials: N-BK7/N-SF2
• Design Wavelengths: 486.1, 587.6, 656.3 nm