Powell Fan Angle

Laserline Optics Canada stocks BK7 lenses with 1°, 5°, 10°, 15°, 20°, 30°, 45°, and N-SF6 (or equivalent) 60°, 75° and 90°. LOC can also manufacture custom fan angles with low non-recurring engineering costs. Substituting the standard substrate with a higher or lower refractive index glass is an economical way of producing a custom fan angle for low volume orders. For example, substituting F2 glass (n=1.6) for the standard 5° BK7 Powell will yield a 7° fan angle.

Special Substrate

Standard optical glass is suitable for most applications, but Powell lenses subject to corrosive chemical environments or requiring broadband wavelength transmission call for careful substrate selection. Fused silica is ideal for its broadband transmission properties and relative insensitivity to chemical attack. All lenses fashioned from standard optical glass change their shape and thus line uniformity with large temperature changes. Applications with high precision line uniformity requirements and subject to high temperatures may utilize zero expansion glass ceramic substrates such as Schott's Zerodure or Corning ULE. Laserline Optics' production process can easily accommodate any substrate with low non-recurring engineering expenses.