The ZWB3 (UG5) is a high-performance Ultraviolet Transmitting Black Glass designed for precision optical applications. As a versatile Broadband UV Pass Filter, it offers superior transmission across the UV spectrum (230nm – 400nm) while effectively blocking visible light. It is specifically optimized for high-contrast imaging under 254nm UVC light sources.Whether you are conducting Forensic Investigation or professional Ultraviolet Photography, ZWB3 provides the optical clarity and contrast required for high-end imaging.

Key Technical Specifications

Parameter	Technical Data
Material Type	ZWB3 (Color Filter Glass)
Equivalent Grades	Schott UG5, Hoya U-330, Kopp 9582
Peak Wavelength	254nm / 310nm / 365nm
Transmission Range	230nm – 400nm (Ultraviolet)
Visible Light Blocking	420nm – 700nm (T < 1×10⁻³)
Available Thickness	1.0mm, 1.5mm, 2.0mm, 3.0mm (Customizable)
Surface Quality	60/40, 40/20 Scratch & Dig

Why Choose ZWB3/UG5 for Your Optical System?

1. Professional Equivalent to Schott & Hoya

ZWB3 is the industry-standard functional equivalent to Schott UG5 and Hoya U-330. It offers a cost-effective solution for B2B procurement without compromising on spectral precision.

2. Optimized for Multi-Spectrum UV Photography

Unlike ZWB1 (UG11) or ZWB2 (UG1) which have narrower passbands, ZWB3 glass provides a broader UV window. This makes it the ideal choice for full-spectrum UV imaging and botanical research where capturing subtle UV patterns is essential.

3. Superior Visible Light Suppression

For 254nm UVC and 365nm UVA applications, ZWB3 acts as a powerful “black glass” filter, ensuring that no stray visible light interferes with your camera sensor or detection equipment.

Core Applications

• Forensic Science: Detection of biological traces and fluorescent fingerprint analysis.

• Scientific Research: UV-induced fluorescence (UVIVF) and mineralogy identification.

• Industrial Inspection: Non-destructive testing (NDT) and UV curing process monitoring.

• Environmental Sensing: Air quality monitoring and UV index measurement.

Frequently Asked Questions (FAQ)

Q: What is the difference between ZWB3, ZWB1, and ZWB2?

A: ZWB3 (UG5) has a wider transmission band compared to ZWB1 (UG11) and ZWB2 (UG1). While ZWB1 is more specialized for deep UVC (254nm), ZWB3 is a more versatile filter for general UV photography and multi-wavelength sensing.

Q: Can YOUJIA OPTICAL provide custom shapes and coatings?

A: Yes. We offer CNC precision cutting for round, square, and custom step-glass shapes. We also provide AR (Anti-Reflection) coatings specifically optimized for the UV range to maximize light throughput.

Q: Is ZWB3 glass suitable for high-temperature environments?

A: Yes, ZWB3 exhibits excellent thermal stability. However, for extreme heat applications, please consult our technical team for specific thermal expansion data.

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