Hoya Colour Glass Filter
Hoya Colour Glass Filters are precision optical materials engineered to provide spectrally selective transmission and absorption across the ultraviolet, visible, and near-infrared regions.
Manufactured from homogenous, high-purity glass, they offer stable spectral characteristics, excellent surface quality, and tight thickness tolerances, making them ideal for imaging, laser, and analytical applications.
Hoya filters are available in a wide range of spectral types — including bandpass, long-pass, short-pass, neutral-density, and heat-absorbing glass — allowing precise control of wavelength transmission and optical density.
They are commonly used in machine vision, fluorescence microscopy, spectroscopy, and photometric instrumentation, where accurate spectral control is critical.
Unlike coated filters, Hoya colour glass filters rely on intrinsic material absorption, ensuring high durability, long-term spectral stability, and resistance to humidity, UV exposure, and temperature cycling.
They can be polished, cemented, stacked, or AR-coated to achieve custom optical performance tailored to specific systems.
At Global Optics UK, we supply the full range of Hoya optical filter glass types, precision-cut, edged, and polished to customer specifications.
We also provide custom dimensions, optical coatings, and filter assemblies for OEM, research, and industrial optical systems — ensuring reliable performance across the UV–NIR spectrum.
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FAQ
FAQ
Q: What are Hoya Colour Glass Filters used for?
A: Hoya Colour Glass Filters are used to selectively transmit, absorb, or attenuate specific wavelength bands in the ultraviolet, visible, and near-infrared regions.
They are commonly used in imaging, spectroscopy, photometry, fluorescence microscopy, and laser applications, where precise spectral control is essential.
Q: How do Hoya filters differ from coated interference filters?
A: Unlike interference filters, which rely on thin-film coatings, Hoya colour glass filters achieve their spectral properties through intrinsic material absorption.
This makes them highly durable, stable under temperature and humidity, and resistant to spectral shift or delamination over time.
Q: What types of filters are available?
A: The Hoya range includes long-pass (L-series), short-pass (V-series), bandpass (Y-, O-, and R-series), neutral density (ND-series), and heat-absorbing (HA-series) glasses.
Each is designed for specific optical functions such as UV blocking, color correction, intensity attenuation, or IR suppression.
Q: Can Hoya filter glass be coated?
A: Yes. Although Hoya filters perform well uncoated, anti-reflective (AR) or protective coatings can be applied to enhance transmission or durability.
Global Optics UK offers custom coatings tailored to your wavelength range and environmental requirements.
Q: How stable are the filters under environmental conditions?
A: Hoya colour glass filters are chemically stable and non-hygroscopic.
They show excellent long-term performance under UV exposure, temperature cycling, and humidity, making them suitable for both laboratory and field use.
Q: What tolerances and surface quality are available?
A: Standard filters are supplied with ±0.1 mm thickness tolerance and 40–20 scratch–dig surface quality.
Precision-polished versions with tighter dimensional or optical tolerances are available upon request.
Q: Where can I download technical data?
A: The full range of Hoya Optical Filter Glass datasheets can be downloaded here