Achromatic lens is a closely spaced and often cemented, combination of positive and negative elements of differing refractive index. These elements are chosen so that the chromate aberration is cancelled at two distant and well-separated wavelengths.
Specifications
Material: | crown glass and flint glass |
Diameter: | +0/-0.2mm |
Clear aperture: | 90% of diameter |
Thickness: | +/-0.1mm |
Radius: | +/-0.1% |
Centration: | < 3 arc minutes |
Surface quality: | 60-40 S/D |
Power: | 3 fringes |
Irregularity: | 0.5 fringe |
Coating: | with AR coating on outside surfaces |
Bevel: | Protective bevel |
* Specifications are subject to the dimensions and materials used.
Positive achromat lens is a closely spaced and often cemented, combination of positive and negative elements of differing refractive index. These elements are chosen so that the chromate aberration is cancelled at two distant and well-separated wavelengths.
Specifications
Material: | crown glass and flint glass |
Diameter: | +0/-0.2mm |
Clear aperture: | 90% of diameter |
Thickness: | +/-0.1mm |
Radius: | +/-0.1% |
Centration: | < 3 arc minutes |
Surface quality: | 60-40 S/D |
Power: | 3 fringes |
Irregularity: | 0.5 fringe |
Coating: | with AR coating on outside surfaces |
Bevel: | Protective bevel |
* Specifications are subject to the dimensions and materials used.
