Optical constants of SF11
Complex refractive index (n+ik)
n k LogX LogY eV
Derived optical constants
Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 23.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -3.7686e-06 1.1024e-08 -1.0898e-12 1.0299e-06 1.5472e-09 0.28946 nd: 1.784720 Vd: 25.638420 density: 3.25 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 8.6e-06 K-1 dPgF: 0.0144 phosphate_resistance: 1.0
NIKON Zemax catalog 2017-11 (obtained from http://www.nikon.com)
See also HIKARI glass data sheets
Hikari Glass Co., Ltd.Hikari Glass Co., Ltd. is a Japanese company specializing in the manufacturing of high-quality optical glass and optical components, and is a subsidiary of Nikon Corporation. Known for its precision engineering and strict quality control, Hikari serves various industries including consumer electronics, scientific research, and industrial optics. The company offers a wide range of specialized optical materials, including various types of crown and flint glasses, which are used in applications demanding high levels of optical clarity and performance. Hikari's products often find use in lenses, prisms, and other optical elements where precision and reliability are critical. With the backing of Nikon's renowned expertise in optics and imaging, Hikari has become a respected name in the field of optics, serving both domestic and international markets. Their expertise in crafting custom solutions for complex optical requirements has made them a preferred choice for organizations in need of specialized glass materials. As a testament to their commitment to quality, Hikari Glass Co., Ltd. is often sought after for projects requiring the highest levels of optical performance and integrity.
SF11 optical glassSF11 is a specialized type of optical glass with a high refractive index and a relatively low Abbe number, indicating higher dispersion properties. This glass type is particularly useful in optical systems where substantial light bending is required, such as in telephoto lenses, high-magnification microscopes, and other compact optical assemblies. However, the high level of dispersion associated with SF11 can result in chromatic aberration, where different wavelengths of light are focused at different points. To correct for this, SF11 is often combined with other glass types that have lower dispersion in complex lens systems, aiming to achieve balanced chromatic correction. Its unique properties make SF11 a popular choice in high-performance optics where both a high refractive index and specific dispersion characteristics are necessary. While SF11 is generally more expensive than more conventional optical glasses like BK7, its specialized attributes make it invaluable in advanced optical designs that demand high levels of performance.
SF11 and similar glasses produced by different makers