Achromats - Lenses - Frontier Optics Online Store

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Diameter (mm) : 6.35 mm X

Price : $20.00 and above X

Focal Length (mm)

12.70 mm (1)

19.00 mm (2)

25.40 mm (2)

31.80 mm (2)

Home > Lenses > Achromats

Achromats

	Achromatic Lenses Specifications



Focal Length Tolerance	±2 %
Material	Optical crown and flint glasses or equivalent
Design Wavelengths	486.1, 546.1, and 656.3 nm
Surface Accuracy	1.5 λ (1.5 λ) power, (λ/4) irregularity at 632.8 nm over the clear aperture
Clear Aperture	≥central 90% of diameter
Surface Quality	40-20 scratch-dig
Centration	≤3 arc min
Diameter Tolerance	+0/-0.1 mm
Center Thickness (Tc = Tc1 + Tc2) Tolerance	±0.2 mm for lenses <50.8 mm diameter
	±0.4 mm for lenses ≥50.8 mm diameter

Edge Thickness (Te) Tolerance	Nominal Value
AR Coating	SLAR (Single-layer MgF2): Ravg <1.5%, Rmax <2.5% per surface, 400–700 nm;
AR Coating	BBAR: Ravg <0.5%, Rmax <1.5% per surface, 430–700 nm
Operating Temperature	-40 °C to 85 °C