Plano-Concave (PCV)Lenses, D=6mm, F=-20mm, NIR H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-1080-YJL)

Plano-Concave (PCV)Lenses, D=6mm, F=-20mm, NIR H-K9L Optical Glass, model 120366, is manufactured by United Optical Technology Co., Ltd.
K9 Plano Concave (PCV) Lenses are plano-concave lenses based on K9 optical glass.
K9 optical glass is an excellent wide-spectrum transmission optical material. It has high transmittance in the 350nm-2000nm band, has high hardness, and can withstand a variety of physical and chemical stimuli. The content of bubbles and impurities is low, so it is often used as the base material for various optical components.

Diameter: 6mm
EFL: -20.00mm
Coating: AR@650~1050nm
Material: H-K9L Optical Glass
BFL: -20.98mm
Curvature Radius R1: -10.33mm
Center Thickness CT: 1.5mm
Edge Thickness ET: 1.95mm
Available Mount Ring: 500033
Design Wavelength: 587.6nm
Diameter Tolerance: +0.0/-0.1
Center Thickness Tolerance: ±0.2
Surface Accuracy: λ/4 @632.8nm
Focal Length Tolerance: ±2%
Centering Tolerance: 3 arcmin
Surface Quality: 40/20-60/40
Bevel: 0.2X45°
n: --

Plano-concave lenses can radiate light and have a negative focal length. One side is flat and the other side is concave. They are often used for beam expansion, projection and enlarging the focal length of optical systems.
It has a negative focal length and negative spherical aberration, which can be used to offset the aberrations of other lenses in the system.

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