Achromatic Doublets

¨Computer-optimized for infinite conjugation
¨Excellent performance

The achromatic-doublet consists of a positive low-index (crown glass) and a negative high-index (flint glass) lens. These lenses are computer-optimized for infinite conjugate ratio. They also exhibit excellent paraxial performance, with minimal spherical aberration, coma and chromatic aberration. When used for focusing or collimating, the convex lens or the smaller radius surface should face the collimated light, when used for imaging the convex lens should face the object or the image with that is farthest away.o:p>Large aperture achromatic lenses are air-spaced, and can be found under DH-0406.

Material: Optical glass (crown and flint)
Focal Length (f'): ±2%
Diameter (F): -0.10mm
Center Thickness (Tc): ±0.1mm
Centration: 3 arc minutes
Fringes: 1~5
Irregularity of Fringes: 0.1~0.5
Surface Quality: 20-10 scratch-dig
Coating: MgF2 AR coated
Clear Aperture: 90% Φ