Description
H-K9L (N-BK7) Plano-Convex Lenses
H-K9L (N-BK7) plano-convex lenses are often used to focus parallel light or collimate point light sources, with excellent transmittance from visible to near infrared (350-2000nm). H-K9L is a commonly used optical glass. When the additional advantages of UV fused silica (good transmittance in the UV band and low thermal expansion coefficient) are not required, H-K9L is generally selected. When converging light, if an absolute magnification of less than 0.2 or greater than 5 is obtained, a plano-convex lens is usually selected. When the magnification is between 0.2 and 5, a biconvex lens is more suitable. To reduce spherical aberration, parallel light should be incident on the curved surface when focusing. A variety of coating specifications can be selected.
Material: H-K9L
Diameter Tolerance: 0.0/-0.1mm
Thickness Tolerance: ±0.1mm
Focal Length Tolerance: ±1%
Design Wavelength: 587.6nm
Clear Aperture: ≥90%
Surface Quality: 40/20(Diameter≤25.4mm),
60/40(Diameter＞25.4mm)
Flatness: λ/4@633nm
Eccentric: ≤3′
Chamfer: 0.3×45°(Diameter≤50.8mm),
Ravg<0.5% per surface@650-1050nm
Ravg<0.5% per surface@1050-1620nm
Ravg<1.25% per surface@400-1000nm
R<0.25% per surface (532nm, 808nm, 1064nm)
H-K9L (N-BK7) plano-convex lenses are often used to focus parallel light or collimate point light sources, with excellent transmittance from visible to near infrared (350-2000nm). H-K9L is a commonly used optical glass. When the additional advantages of UV fused silica (good transmittance in the UV band and low thermal expansion coefficient) are not required, H-K9L is generally selected. When converging light, if an absolute magnification of less than 0.2 or greater than 5 is obtained, a plano-convex lens is usually selected. When the magnification is between 0.2 and 5, a biconvex lens is more suitable. To reduce spherical aberration, parallel light should be incident on the curved surface when focusing. A variety of coating specifications can be selected.
Material: H-K9L
Diameter Tolerance: 0.0/-0.1mm
Thickness Tolerance: ±0.1mm
Focal Length Tolerance: ±1%
Design Wavelength: 587.6nm
Clear Aperture: ≥90%
Surface Quality: 40/20(Diameter≤25.4mm),
60/40(Diameter＞25.4mm)
Flatness: λ/4@633nm
Eccentric: ≤3′
Chamfer: 0.3×45°(Diameter≤50.8mm),
0.4×45°(Diameter＞50.8mm)
Coating:
MGF AR coating: Single layer MgF2, Ravg<1.75% per surface@400-700nm
Ravg<0.5% per surface@370-675nmRavg<0.5% per surface@650-1050nm
Ravg<0.5% per surface@1050-1620nm
Ravg<1.25% per surface@400-1000nm
R<0.25% per surface (532nm, 808nm, 1064nm)
