Active Member
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[China]
Address: Building 7, No. 116, Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province
Contact name:Jason
Wuhan Siwer Optics Co.,Ltd |
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Achromatic lenses are very common type of viewer lenses,they
consist of two or more lense elements,which have been corrected for
chromatic aberration with respect to two selected wavelengths,the
elements must be fixed in relation to one another by either
mounting or cement.
Achromatic lenses are designed to specifically function within the
infrared,visible,or ultra-violet wavelength ranges,and they are not
symmetric devices.
They 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 - 700 nm) or
the near infra-red (600 – 1200 nm).
Optical AR Coatings
a) Uncoated,The surface reflectivity of uncoated visible lenses(Refractive index＝1.5) is about 4%.
Click on the link to see how to calculate reflectivity
b) AR/AR@400-700nm,Tavg>99.4%
c) AR/AR@450-650nm,Tavg>99.6%
d) AR/AR@400-1000nm,Tavg>98.5%
e) We can also customize high damage threshold antireflective coatings
| Material | Optical glass |
| AR Coating Range | 400-700nm or customized |
| Reflectance over AR Coating Range @ 0° AOI | Ravg<0.5% |
| Diameter Tolerance | +0.0/-0.1 mm |
| Thickness Tolerance | ±0.1 mm |
| Focal Length Tolerance | ±2% |
| Surface Quality | 40/20 Scratch-Dig |
| Surface Flatness (Plano Side) | λ/2 at 633nm |
| Spherical Surface Powerc (Convex Side) | 1.5λ at 633nm |
| Surface Irregularity (Peak to Valley) | λ/2 at 633nm |
| Centration | <3 arcmin |
| Clear Aperture | >Ø10.16 mm (Ø1/2" Lenses) >Ø20.32 mm (Ø1" Lenses) |
| Design Wavelength | 546nm |
Lens Grinding
Lens High Speed Polishing
Optical Coating
