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Achromatic Triplet Lenses

Achromatic triplet lenses minimize Seidel aberrations, usually by gluing three lenses together or mounting three lenses in a housing. Suitable for measurement and imaging applications such as projection, photography, fluorescence microscopy, image relay, inspection, spectroscopy, etc. After milling, fine grinding, grinding and polishing, the single lens in the glued lens can reach the optical surface accuracy ≤0.1 micron, and the surface roughness Ra≤0.01 micron. The three lenses are glued to three lenses, and the achromatic triplet lens is glued by using a centering device with a curing device with UV photosensitive adhesive for precision bonding and eccentricity testing.

achromatic triplet
achromatic triplet lens
aspheric achromatic lens

Specifications of Achromatic Triplet Lenses


Achromatic Triplet Lenses product parameter table
ProjectIndicator requirements
1.MaterialA variety of high and low refractive index optical glass, ultraviolet fused quartz elements, optical quartz and other materials
2.Outer DiameterRound OD≤300mm, Square L×W≤210×210mm   ±0.05mm
3.Center ThicknessT≤100mm±0.02 or according to customer requirements
4. Effective focal lengthaccording to customers needs
5. Working distanceaccording to customers needs
6. Design wavelengthaccording to customers needs
8.CoatingAR anti-reflection coating R < 0.5%@λnm according to customers needs
9.eccentricityaccording to customers needs
10. Effective apertureED>90% aspherical area
11. Surface ShapeUltra-high precision Rt≤0.1μm, high-precision Rt≤0.5μm, precision Rt≤1μm
12.Surface quality60-40, 40-20, 20-10, 10-5


Features of Achromatic Triplet Lenses

Features of Achromatic Triplet Lenses
  • One-stop customized production: Solar Valley processes a variety of round and square achromatic triad lenses, such as positive achromatic lens, negative achromatic lens, asspherical achromatic lens and so on according to customer requirements.

  • aterial: Use a variety of high and low refractive index optical glass, calcium fluoride glass, UV fused quartz elements, optical quartz and other materials.

  • Achromatic triplet lens performance: Tianyang Valley strictly matches the diameter and center thickness to ensure the adhesive thickness and the center thickness required by high precision. Using UV curing/gluing technology on different glass materials, Tianyang Valley dynamically adjusts the optical center of the three parts during the gluing process, eliminating the overall optical center eccentricity after gluing. For high refractive index optical materials, the use of high refractive index UV photosensitive adhesive corresponding, accurate control of the center thickness tolerance of the adhesive can be used for optical design that is very sensitive to air spacing. From ultraviolet to near-infrared achromatic lenses, the operating band can be 193nm to 1000nm, achieving a consistent focal length and minimizing spherical aberration performance.

  • Product size indicator description:

    Achromatic triplet lens maximum dimensions: OD≤φ300mm

    The maximum external dimension of the square achromatic triad lens: L×W≤210×210mm achromatic triad lens center thickness T≤100mm

    Achromatic triplet lenses can achieve the following accuracy levels according to customer requirements:

    Ultra-high precision: surface shape error < 0.1μm, surface roughness < 0.01μm

    High precision grade: Surface error < 0.5μm, surface roughness < 0.05μm Precision grade: Surface error < 1μm, surface roughness < 0.1μm


  • Surface defect grade: 60-40, 40-20, 20-10, 10-5 According to customer requirements.

  • Coating: Coating according to customer requirements.

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