Achromatic lens(Cemented lens)

Achromatic lens


MaterialAll type of material are available to design the optimal achromats
Diameter Tolerance+0/-0.1 mm
Focal Length Tolerance±3%
Chamfer0.25 mm @ 45°
Surface Figureλ/4 @ 632.8 nm
Surface Quality60-40 scratch & dig
Design Wavelength632.8 nm
AR CoatingsVIS or NIR
The achromatic lens also called cemented lens is a combination of two lenses made of two materials, machined by gluing together two surfaces of matching curvature on the concave and convex sides using an optical adhesive, the achromatic lens focuses (images) all the white light entering the lens at the same point on the other side of the lens. When used on an axis, the achromatic lens focuses the parallel input beam to a perfect “point”. The achromatic lens can be used for light collimation and light focusing, as well as for high quality imaging on the axis.

Due to reduced longitudinal and transverse spherical aberrations, an optimized composition of two lenses-Achromates assures substantially sharper focus than singlet spherical lenses. Additionally, they have essentially constant focal length over a broad wavelength range.Cemented achromatic duplet lenses are designed to perform flawlessly in terms of chromatic and spherical aberrations. Two wavelength ranges are covered by typical achromatic duplet lenses: visible (400 nm–700 nm) and near infrared (700 nm–1050 nm).

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