Visual and Material Precision
Cevians offers an array of high-precision lenses and prisms that are custom machined and composed of a variety of materials. Standard geometries are available, including plano-convex, plano-concave, achromatic, double concave, double convex, and cylindrical. Prisms up to 2” are offered for right angle, roof, Amici, wedge, and dove.
These critical components manufactured to requirements are used in a number of precision sights, periscopes, spectroradiometer, heads-up display light engines, and vision blocks.
Custom Finishing and Assembly
The optics can be finished using Cevians’ standards or customized coating or assembled using optical bonding processes to other optical elements.
Cevians also provides a one provider solution where other electro-mechanical components and structures can be added to for a subcomponent assembly. This can include light engines and sensors with driving electronics. In most cases, Cevians’ products are better suited in complex, low volume applications where the optics are a part of a system that includes other elements.
Technical Summary Flat Window
|Standard Grade||Class I||Class II|
|Material||BK7 grade A optical glass||BK7 grade A optical glass||BK7 grade A optical glass|
|Dimension Tolerance||+0/-0.05 to 0.01mm||+0/-0.05 to 0.01mm||+0/-0.05 to 0.01mm|
|Thickness Tolerance||± 0.05mm||± 0.05mm||± 0.05mm|
|Surface roughness||10 to 5 Arms||10 to 5 Arms||10 to 5 Arms|
|Clear Aperture||> 89%||> 89%||> 89%|
|Flatness(@633nm)||1λ per 25mm||λ / 4||λ / 10|
|Parallelism||1 arc minutes||30 arc seconds||10 arc seconds|
|Surface Quality(S/D)||60/40||40/20||2021-10-20 00:00:00|