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Location: Main > Optical Lenses > Spherical Plano Concave Lenses > POL-BK7-PCV-A-25.4-400
Name: D25.4mm BK7 Plano-Concave Lens f-400mm(400-750nm)
P/N: POL-BK7-PCV-A-25.4-400
Keywords:Dia25.4mm,BK7,PCV,EFL-400mm,AR@400-750nm
Unit Price: S$75.00/pc
Available: In stock
Request: Add to Request List
Introduction:
If the lens is plano-concave, a collimated beam of light passing through the lens is diverged (spread); the plano-concave lens is thus called a negative or diverging lens. The beam after passing through the lens appears to be emanating from a particular point on the axis in front of the lens; the distance from this point to the lens is also known as the focal length, although it is negative with respect to the focal length of a converging lens.

BK7 Optical Glass Lenses, Plano-Concave Design
Diameter 1-inch, AR coated at 400-750nm

Substrate Material: BK7 optical glass
Wavelength Range: 350nm-2.0um
Design Wavelength: 633nm (n=1.515082), plano-concave
Outer Diameter: 25.4mm (+0.0/-0.1mm)
Surface Radius of Curvature -206.0mm (+/-1%)
Centre Thickness 2.1mm (+/-0.1mm)
Edge Thickness 2.5mm (+/-0.1mm)
Effective Focal Length: EFL -400mm (+/-1%)
Scratch/Dig: 40/20
Centration: <3 arc minutes
Surface Accuracy: <lambda/4 @ 633nm over clear aperture
Edge Thickness: Te=2.4,+/-0.1mm
Clear Aperture: >90%
Coating: AR coated at 400-750nm(R<0.5% max),both surfaces (0-deg AOI designed)