Gold Member Since 2015
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Shijiazhuang Zeyuan Optics Co., Ltd.

Filter, Glass Filter, Optical Lens manufacturer / supplier in China, offering Optical Glass Filter, Bk7, IR Cut Filters Blue Glass 650nm, Infrared Pass Filters Hwb780 and so on.

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Supplier Homepage Product Optical glass Optical Glass Filter, Bk7

Optical Glass Filter, Bk7

FOB Price: US $0.5-50 / piece
Min. Order: 10 piece
Min. Order FOB Price
10 piece US $0.5-50/ piece
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Production Capacity: Customized
Transport Package: Carton Packing
Payment Terms: L/C, T/T, Paypal, Western Union

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Basic Info
  • Model NO.: BK7
  • Type: Color Filter
  • Material: Glass
  • Customized: Customized
  • Trademark: Zeyuan
  • Origin: China
  • Usage: Optical
  • Principle: K9
  • Shape: Customized
  • Size: 6mm-200mm
  • Specification: SGS
  • HS Code: 9001909090
Product Description

borosilicate crown glass is used for windows, lenses, and prisms where transmission in the range 0.4µm to 1.4µm is desired. the refractive index varies from about 1.53 to 1.5 through this range. it is used for thermally non-critical applications.
transmission range0.4µm to 2.5µm
density2.51 g/cc
thermal expansion7.1x10-6 /°k @ -30° + 70°c, & 8.3x10-6 /°k @ 20°c to 300°
surface finishbk-7 polishes extremely well & polishes of 10-5, or 20-10 scratch-dig are achieved at extra costs respectively, mainly for uv & visible applications.
surface figuresurface figure of 1/10 wave to 1/4 wave @ 0.6328µm are specified mostly on lenses for ultraviolet & visible use.
ar coating optionsar @ 0.8-2.5µm, ar @ 1.064, ar @ visible wavelength.
typical applicationsastronomical, thermal imaging
products manufacturedlenses, windows, wedges, prism, beamsplitters, filters.


wavelength (µm)
index of refraction (n)

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