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KPT-142 K9 Plano convex lens, Optical lens, Flat convex lens, dia:30.0mm, f:100.0mm
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About KPT-142 K9 Plano Convex Lens, Optical Lens, Flat
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 Lenses are coated products, please confirm the product's parameters before buying. If there is no product quality issues, the sale is not refundable, please understand~ Material: K9 fine annealing Diameter: 30.0mm Deviation of Diameter: +0.0/-0.2 Aperture: >90% Focal length(f'): 100.0mm Deviation of focal length(Df): ±2% 587.6nm Back focal length(fb): 96.9 Thickness of center(Tc): 4.7 Deviation of Thickness of center(DTc): ±0.1 Thickness of edge(Te): 2.5 Deviation of center: 3' Diaphragm: 1~5 Local diaphragm: 0.2~0.5 Clearing: IV stand Coating: MgF2 antireflection film Weight: 6.0
