Custom Bonding Achromatic Doublet Lens Cemented Double Lens

Bonding achromatic lens is an achromatic consists of a positive low-index Crown Glass lens to a negative high-index Flint Glass lens cal en so as to cancel chromatic aberration at two well-separated wavelengths, usually in the blue and red region of the spectrum. Focal length is constant at those two wavelengths and focal length shifts are virtually eliminated across the visible wavelengths. One frequent use is to achieve diffraction limited focusing of a laser beam. Negative Achromatic doublet lenses are typically used when there is a need to eliminate chromatic aberration. In addition to reducing chromatic aberration at the design wavelengths, srical aberration and coma are greatly reduced. True Optics can provide Positive Achromatic Lens and Negative Achromatic lens by two piece single lens (Doublet) or three piece single lens (Triplet).Material: Clear Optical GlassSurface Flatness: < λ/5 @ 633nmScratch/Dig: < 40/20 (both sides)Eccentricity: ≤ 1arcminFocal Length Tolerance < ± 1%Diameter Tolerance: < + 0.00/ -0.10mmThickness Tolerance: < ± 0.1Clear Aperture: ≥ 90% of diameter AR ORCoating: AR OR BBARDiameter Range: 5~260m