Focusing or imaging applications
Focal Length: f = -R/(n-1)
n: refractive index
R: radius curvature

Plano-concave lenses are useful for a wide range of applications. These lenses are manufactured from BK7A grade A (or customer design) optical glass and are supplied uncoated. Anti-reflection coatings are available as listed earlier in this section. To order an anti-reflection coated lens simply append the wavelength in nanometers to the product number.

parameter:

Item PLCX,PLCC,BICX,BIXX,CXCC,DOUBLET
Material BK7 etc.
Design Wavelength Customer design
Dimension Tolerance +0/-0.05mm
Thickness Tolerance +/-0.1mm
Surface Quality 40-20 or better
Surface Figure Sph surface:Lambda/4 or better @632.8nm
Center Error ETV better than 0.01mm
Clear Aperture 90% of diameter
Bevel Protective bevel
Coating BBAR or customer design