Product Description

Seray Optics produces achromatic lenses or achromats, which are designed to limit the effects of achromatic and spherical aberrations. Achromats are corrected to bring two different wavelengths of light into focus within the same image plane.

The most common type is the achromatic doublet, consisting of two glass lenses. Typically, one lens is a negative flint glass, and the other is a positive crown element. The lenses are usually cemented together and are available in diameters from 5.0mm to 125.0mm.

Positive Achromatic lenses
Realpoo optics achromats are available in focal lengths from 10.0mm to 500mm. MgF2 coating is standard. BBAR and other custom coatings are always available. Minimum purchase quantities may apply to these orders.

Negative Achromatic lenses
These lenses are primarily used to increase the focal length of other lenses or lens systems (Barlow Lens) or to expand a light source. Realpoo Optics can provide any EFL or diameter in a variety of glass types and housings.

Our company is a professional customized-oriented optical factory and verified by TUV Rheinland.


Material	Optical Glasses(offer your request or drawings)
Diameter Tolerance	+0/-0.1 mm,+0/-0.025
Clear Aperture	>90%
Focal length Tolerance	+/-1%
Flatness	1/4 Lambda
Surface Quality	80/50~10/5 scratch and dig
Chamfer	0.1-0.5 mm x 45 degree
Coating	upon your request

The usage of the achromatic lens

The achromatic lenses must be installed with the correct front-to-back orientation (thicker element usually faces the eyes) if installed incorrectly. With the lens orientation installed backwards the result will be extensive distortion and aberration. Optical glued lens are supplied coated or with a single layer anti-reflection coating suitable for the visible (400 - 600 nm) or the near infra-red (600 – 1200 nm).

Effect of the achromatic lens

Achromatic lens

Coupling of different dispersion property lenses

Focusable multi-wavelength rays on a single point

Negative achromatic lens

Positive achromatic lensTriplet achromatic lensEdge blacken achromatic lensDrilling hole achromatic lensAchromatic lens system