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UV-Guard™ XB

Extreme UV-Blocking Filters

Materion Balzers Optics UV-Guard™ XB filters are high performance dichroic filters with extremely high blocking for ultraviolet radiation and optional IR blocking characteristics. The outstanding UV blocking is achieved with a combination of tailored dichroic coatings produced with Materion Balzers Optics’ proprietary sputter depostion technology. Standard borosilicate glass substrates are used for UV-Guard™ XB filters. The UV blocking levels of UV-Guard™ XB filters are similar to UV-absorption glass, without high substrate cost and temperature dependent spectral performance. UV-Guard™ XB dichroic filter coatings can be applied on flat shaped customer specific substrates including flyeye lens.

Extreme UV-Blocking Filters

Benefits

  • Extremely high UV-rejection (typ better than 10–5), similar to UV-absorption glass
  • Superior optical stability at higher operating temperatures (spectral stability typ. < 0.7 nm/100 °C)
  • Very narrow cut-on/cut-off edge tolerances (< ± 1%)
  • Very steep cut-on slopes available
  • High transmission for visible light
  • Excellent spectral uniformity and stability under varying environmental conditions (spectral shift typ. < 0.5 nm)
  • Standard low cost borosilicate substrates (other glass substrates upon customer request)
  • High volume production capabilities
  • Engineering support for custom designed UV-Guard™ XB filters


Applications

UV Guard™ XB filters are specially designed for applications which require extraordinary blocking of UV radiation. Typical applications are in tLCD and LCOS based projection display systems:

  • Primary UVIR filter at UHP lamp
  • Secondary UV filter for blue channel

Other applications which involve UV-sensitive optical components in instrumentation and sensors.

Technical Data

Typical performance* (AOI = 0°)


T = 50%

T20%–T80%

300–380 nm

380–420 nm

440–660 nm

750–900 nm

UV-Filter type

430 ± 4 nm

< 6nm

T < 0.001%

dlogT/dλ ~0.1 nm–1

T-avg > 96%

n.a.

UV/IR-Filter type

430 ± 4 nm
680 ± 6 nm

< 8 nm (UV)
< 16 nm (IR)

T < 0.001%

dlogT/dλ ~0.15 nm–1

T-avg > 95%

T-avg < 2%

* other performance upon customer request


Heat resistant

Surface quality

up to 400 °C

80/50 (typical)

Environmental stability

according to MIL-M-13508C

Substrate material

heat resistant Borosilicate glass

UV-Guard™ XB types available

UV-blocking filter for blue channel in tLCD

Primary UVIR filter with extreme UV-blocking for tLCD/LCOS

UV blocking filter with broadband RGB transmission

UV-IR filter application of UV-Guard™ XB
UV filter application of UV-Guard™ XB

Typical spectral curves of UV-Guard™ XB Filters together with emission spectrum of typical UHP lamp

UV Filter (UV Guard™ XB)
UV-IR Filter (UV Guard™ XB)
UV Filter (UV Guard™ XB)
UV-IR Filter (UV Guard™ XB)
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