Plano-convex lenses are mostly used for focusing parallel rays of light to a spot. The asymmetry of these lenses between the front and back surface minimizes spherical aberration effectively, particularly in the situations where the object and image are not at equal distance from the lens. The optimum case is where the object is placed at infinity (regarded as parallel rays entering lens) and the image is on the focus, which has infinite conjugate ratio, i.e. object distance/image distance. The curved surface of the lens should face the object direction.
• Material: BK7 grade A, fine annealed
• Focal Length (f’): ±2%@587.6nm
• Diameter(φ) Tolerance: +0.0/-0.20
• Center Thickness (Tc): ±0.1
• Centration: 3’
• Form Error: 1 ～ 5 fringes
• Irregularity of Fringes: 0.2 ～ 0.5 fringes
• Surface Quality: 60-40 scratch-dig
• Coating: GCL-0101xx: 1/4 wave MgF2 coating at
550nm for 0°angle of incidence
GCL-0101xxA: VIS Multiple Layers AR
coating, Rave≤0.5%@450-800nm
GCL-0101xxB: NIR Multiple Layers AR
coating, Rave≤0.5%@800-1100nm
• Clear Aperture: 90% diameter
Geometry/curvature : plano-convex
Material : BK7
Optical characteristics : visible
Applications : optical
Other characteristics : focusing
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