Optical constants of BAK1
H-BAK8 (CDGM)
Wavelength:
µm
(0.290–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.845101506λ^2}{λ^2-100.298196}+\frac{1.01452466λ^2}{λ^2-0.00555241848}+\frac{0.418518474λ^2}{λ^2-0.0202280796}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 6.29e-08 1.64e-08 -1.82e-11 4.71e-07 4.87e-10 0.223
nd: 1.572500
Vd: 57.486797
glass_code: 573575
density: 3.18 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.4e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.9e-06 K-1
dPgF: -0.001
climatic_resistance: 2.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets
Data
INFO
CDGM Glass Co., Ltd.
CDGM Glass Co., Ltd. is a leading manufacturer of optical glass based in China. The company offers a wide range of optical materials, including various types of crown and flint glasses, which are used in applications ranging from consumer electronics to advanced scientific instruments. Known for their capacity for large-scale production as well as their commitment to quality, CDGM has positioned itself as a major player in both domestic and international markets. Their optical glass products are often used in lenses, prisms, and other optical components that require high precision and reliability. With an extensive catalog that caters to different optical requirements, such as high refractive indices or low dispersion, CDGM serves a diverse clientele including manufacturers of microscopes, telescopes, cameras, and other high-precision optical equipment. The company's expertise in glass science and its ability to provide customized solutions have made it a go-to supplier for businesses seeking high-quality, reliable optical glass.External links
BAK1 optical glass
BAK1 (Borosilicate Crown 1) is a type of optical glass that combines boron and silicate, among other elements, to achieve specific optical properties. This glass type is often used in specialized optical applications that require low dispersion and a high refractive index. BAK1 is known for its good transmission across the visible spectrum and into the near-infrared range, making it suitable for a variety of optical devices like telescopes, binoculars, and certain types of lenses. Its low level of optical aberrations makes it a choice material for high-quality imaging systems. Like other high-quality optical glasses, BAK1 can be expensive and is generally used in applications where its particular optical characteristics offer a noticeable advantage. Overall, BAK1 represents a specialized category of optical glass, designed for applications requiring high performance and specific optical properties.BAK1 or similar glasses produced by different makers
| Maker | Glass |
|---|---|
| Schott | N-BAK1 |
| Hikari | E-BAK1 |
| Ohara | S-BAL11 |
| CDGM | H-BAK8 |