Diameter: 5-250 mm
Parameters |
Achievable accuracy * |
---|---|
Surface Quality, Scratch/Dig |
20/10 |
Surface Accuracy, Power/Irreg |
0.5/0.1 wave @ 633 nm |
TIR, mm |
0.01 |
Tolerance for diameter, mm |
0.01 |
Tolerance for thickness, mm |
0.01 |
Focal Length tolerance | 0.5% |
* Determined by the material and parameters.
Processing of rotationally symmetric, asymmetric surfaces, Fresnel lenses and lens arrays, and also surfaces of free form is also possible.
Maximum deviation of the aspherical surface from the nearest sphere is up to few millimeters.
Surface monitoring is made directly on the machine using the UltraCompTM profiler with sensitivity not less than 10 nm (fig. 1).
Optical surfaces as large as 200 mm can be directly machined.
Reachable optical surface machining parameters of products:
Roughness of polished surface – Ra 3-5 nm (fig. 2)
Accuracy of form («P-V») – λ/2, λ=633 nm (fig. 3)
The use of aspherical surfaces allows to produce optical systems with unique properties at minimum size and helps to save expensive infrared materials by reducing the number of optical elements. This is one of the most innovative trends in optical technology.
One of the bright examples is the possibility to manufacture hybrid single germanium lens (instead of two different materials lenses with different dispersion) that combines an aspherical surface with diffractive elements and provides optical system achromatization in the range of 8-14 microns.
Using diamond turning, so-called "flat" lenses can be manufactured – plane-parallel plates with diffractive structure working as lenses, resulting in a substantial reduction in cost and weight of infrared lens objectives.
Reducing the dimensions and weight characteristics while maintaining or even improving image quality through the use of aspherical elements is very important for infrared lens objectives, widely used in aerospace and aviation industries.
We also produce metal (aluminum alloy, copper and brass) aspherical mirrors for telescopic systems.
Non-aspheric lens objective can be re-calculated to a new design, using aspherical and/or diffractive surfaces, and then fabricated.
Diameter: 5-250 mm
Parameters |
Achievable accuracy * |
---|---|
Surface Quality, Scratch/Dig |
40/20 |
Surface Accuracy, Power/Irreg |
1/0.25 wave @ 633 nm |
TIR, mm |
0.02 |
Tolerance for diameter, mm |
0.05 |
Tolerance for thickness, mm |
0.05 |
* Determined by the material and parameters.
Size: 10-150 mm
Parameters |
Achievable accuracy * |
---|---|
Surface Quality, Scratch/Dig |
40/20 |
Surface Accuracy, Power/Irreg |
3/1 wave @ 633 nm |
TIR, mm |
0.02 |
Tolerance for diameter, mm |
0.05 |
Tolerance for thickness, mm |
0.05 |
Focal Length tolerance | 0.5% |
* Determined by the material and parameters.
Diameter: 5-300 mm
Parameters |
Achievable accuracy * |
---|---|
Surface Quality, Scratch/Dig |
20/10 |
Surface Accuracy, Power/Irreg | 0.5/0.1 wave @ 633 nm |
Parallelism |
2 sec |
Tolerance for diameter, mm |
0.01 |
Tolerance for thickness, mm |
0.01 |
* Determined by the material and parameters.