ULTRAVIOLET LONGPASS FILTER GLASS

Recent technological advancements, especially in UV LED technology, have opened a new frontier for applications that harness the power of UV light. However, light often needs to be filtered and controlled to gain desired performance results.Our UV filter glasses have been designed to meet common industry requirements; but we also have the capability to customize glass compositions for emerging technologies and applications.

These clear UV glasses feature high transmission across the UV and visible spectrum with tailored transmission cut-offs ranging from 240 nm to 400 nm. In many applications, such as in UV curing, you need high transmission to increase throughput and improve quality. These filters provide high transmission across the UV-A, UV-B, and portions of the UV-C wavelength regions, similar to fused quartz or silica.

Available in two formats, our filter glass can be supplied either as unfinished 6”-6.5” square blanks or as molded glass. Learn more about our unique capability to mold filter glass.

Our UV filter glasses are often preferred for harsh, demanding applications due to their superior durability and resistance to abrasion, chemical corrosion, UV degradation, and thermal shock. We can heat strengthen our UV filter glass to further improve mechanical durability and thermal shock resistance.



Filter
Nominal Thickness
(mm)
Thickness
Variation
(mm)
Thermal Expansion
( * E-7 °C-1)
Internal Transmittance (nm)
3850
4
+/- 0.10
108
< 0.0055 (334)
> 0.70 (405)
7380
2
+/- 0.10
85
< 0. 0055 (334)
> 0.65 (365)
9335
2
 
52
≥ 0.50 (335)
≥ 0.85 (390)
9345
2
 
52
≥ 0.50 (345)
≥ 0.85 (400)
9500
2
 
47
> 0.50 (310)
> 0.85 (360)
9530
3
 
78
9550
3
 
47
9570
3
 
47

 

Need more information? Download the complete spectral datasheets for our UV longpass filters.

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