Plano Concave Lens 20mm Diameter −50mm Focal Length Uncoated

SLB-20-50N

These simple negative lenses have many uses. Alone they form a virtual image of a distant object or collimated light source. Used in combination with other optics they reduce the power of the system. Sharp edges which are common in negative lenses are removed by beveling in order to reduce the likelihood of chipping.

Details

◦There are three types of plano concave lenses available; BK7 for use in visible range to infrared wavelength range.
◦BK7 lenses are also available with three types of anti-reflection coatings, visible wavelength range, in the near-infrared range and in the infrared range.
◦Our lenses are listed by outside diameter and focal length to assist your selection according to required specifications.

Weitere Informationen

Weitere Informationen
Name	Plano Concave Lens 20mm Diameter −50mm Focal Length Uncoated
Gewicht	0.0500kgs
Standardbeschichtungen verfügbar	Ja
Leitfaden	Lenses are available in a large selection and in custom sizes and focal lengths. In addition to our standard coating we offer custom anti-reflective coating at specific wavelengths.
Anmerkung	-
Achtung	Plano concave lenses are negative lenses that diverge collimated incident light and are primarily used in conjunction with plano convex lenses to shape beams. The plano-concave lens has chromatic aberration, the focal length will vary depending on the wavelength.Please check the “wavelength characteristic of the focal length data” on “Technical Data” for the focal lengths of each wavelength. The plano concave lenses are designed for parallel light to be incident to the concave surface. Transmissions losses due to reflection off the front and rear surfaces of the lens can be minimized by coating the surfaces. Consult our Sales Division for anti-reflection coatings suitable for your application. Sharpe edges are common in negative lenses are removed by beveling in order to reduce chipping may result in smaller then edge thickness. Thicknesses listed in tables are to theoretical sharp edge.
Durchmesser φD	20mm
Brennweite	50mm
Material	BK7
Design Wavelength	546.1nm
Refractive index n<sub>e</sub>	1.519
Coating	Uncoated
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	20-10
Wavelength range of Antireflection Coating	Uncoated
Diameter φD	φ20mm
Focal length f	−50mm
Edge thickness te	4mm
Center thickness tc	2mm
Back focal length fb	−51.3mm
Radius of curvature r	25.95mm
Centration	＜1′

Auf Lager

SKU

SLB-20-50N

25,90 €

Plano Concave Lens 20mm Diameter −50mm Focal Length Uncoated

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