The triplet lens is made of a piece of low refractive index crown glass and two pieces of high refractive index flint glass. It is usually used to eliminate the spherical chromatic aberration. Achromatic triplet lens is usually used in projection systems, imaging systems, laser measurement systems, etc.

Compared with single lens or meniscus lens, triplet lens has the advantages of the clearest and most realistic imaging. In the projection system, single lens and double lens can not form the high quality image that triplet lens can form. When comparing image clarity by naked eye, it is almost impossible to find a lens with superior performance than triplet lens.

Bonding Achromatic Lens is an achromatic consists of a positive low-index Crown Glass lens element cemented to a negative high-index Flint Glass lens element. The elements are chosen 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 are typically used when there is a need to eliminate chromatic aberration. In addition to reducing chromatic aberration at the design wavelengths, spherical 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 Glass

Surface Flatness:              < λ/5 @ 633nm

Scratch/Dig:                   < 40/20 (both sides)

Eccentricity:                   ≤ 1arcmin

Focal Length Tolerance         < ± 1%

Diameter Tolerance:            < + 0.00/ -0.10mm

Thickness Tolerance:           < ± 0.1

Clear Aperture:                 ≥ 90% of diameter AR OR

Coating:                     AR OR BBAR

Diameter  Range:            5~260m

If you need to customize triplet lens, please contact JUKA Optical.