Drum Lenses, D=3.00mm, F=2.93mm, Uncoated H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2669-YJL)

Drum Lenses, D=3.00mm, F=2.93mm, Uncoated H-K9L Optical Glass, model 165002, is manufactured by United Optical Technology Co., Ltd.
A drum lens has a shorter focal length and greater magnification than an ordinary convex lens. Its focal length depends on the refractive index of the material itself. K9 optical glass is an optical material with excellent wide-spectrum transmission. It has high transmittance from 350nm to 2000nm, 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 substrate for various optical components to make various optical components.

Diameter: 3.00mm
EFL: 2.93mm
Coating: Uncoated
Material: H-K9L Optical Glass
BFL: 0.93mm
Center Thickness CT: 4.00mm
Design Wavelength: 587.6nm
Diameter Tolerance: +0.0/-0.05mm
Center Thickness Tolerance: ±0.005mm
Surface Accuracy: λ/4@632.8nm
Surface Quality: 40/20-60/40
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The K9 Drum Lensess is a lens with spherical ends that provide positioning surfaces along the optical axis. It is formed by grinding the outer circle on the basis of a ball lens for the convenience of card installation. It is more suitable for the propagation of light in optical communications.
It has a shorter focal length and greater magnification than an ordinary convex lens.

Drum Lenses, D=4.00mm, F=3.67mm, Uncoated H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2670-YJL)
Drum Lenses, D=5.00mm, F=5.87mm, Uncoated H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2671-YJL)
Drum Lenses, D=2.00mm, F=1.83mm, VIS H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2672-YJL)
Drum Lenses, D=2.00mm, F=2.20mm, VIS H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2673-YJL)
Drum Lenses, D=3.00mm, F=2.93mm, VIS H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2674-YJL)
Drum Lenses, D=4.00mm, F=3.67mm, VIS H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2675-YJL)