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Precision Round Windows

Precision Round Windows
  • manufactured from the best quality FS, UV FS and BK7
  • precision polished on both surfaces and held parallel up to 3 arcsec

The windows are designed to be used in precision optical systems. The optical transmission is high with little distortion of transmitted signal. λ/10 transmitted wavefront distorsion is usually preferred but λ/4 is offered as an option when this is not an issue.
Windows can be anti-reflection coated, for required coating please refer to the COATINGS section.
Diameter up to 250 mm is available on request.


Material - BK7
Code Diameter - Metric Diameter - English Material Thickness T Flatness Parallelism Item price, USD In stock Choose diameter Add to cart
220-0101 12,5 mm 12,7 mm BK7 3 mm λ/10 30 arcsec 31.- In stock MetricEnglish Add to cart
220-0161 12,5 mm 12,7 mm BK7 6 mm λ/10 30 arcsec 28.- In stock MetricEnglish Add to cart
220-0191 20 mm 20 mm BK7 3 mm λ/10 30 arcsec 39.- In stock MetricEnglish Add to cart
220-0211 20 mm 20 mm BK7 5 mm λ/10 30 arcsec 34.- Request MetricEnglish Add to cart
220-0231 25 mm 25,4 mm BK7 3 mm λ/10 30 arcsec 49.- In stock MetricEnglish Add to cart
220-0201 25 mm 25,4 mm BK7 6 mm λ/10 30 arcsec 43.- In stock MetricEnglish Add to cart
220-0462 40 mm 38,1 mm BK7 6 mm λ/10 30 arcsec 62.- Request MetricEnglish Add to cart
220-0402 40 mm 38,1 mm BK7 8 mm λ/10 30 arcsec 56.- In stock MetricEnglish Add to cart
220-0562 50 mm 50,8 mm BK7 6 mm λ/10 30 arcsec 86.- In stock MetricEnglish Add to cart
220-0582 50 mm 50,8 mm BK7 8 mm λ/10 30 arcsec 78.- In stock MetricEnglish Add to cart
220-0502 50 mm 50,8 mm, BK7 10 mm λ/10 30 arcsec 72.- In stock MetricEnglish Add to cart
220-0722 75 mm 76,2 mm BK7 12,7 mm λ/10 30 arcsec 182.- In stock MetricEnglish Add to cart
220-0752 75 mm 76,2 mm BK7 15 mm λ/10 30 arcsec 165.- In stock MetricEnglish Add to cart
220-0103 12,5 mm 12,7 mm BK7 3 mm λ/10 3 arcsec 49.- Request MetricEnglish Add to cart
220-0163 12,5 mm 12,7 mm BK7 6 mm λ/10 3 arcsec 45.- Request MetricEnglish Add to cart
220-0193 12,5 mm 12,7 mm BK7 10 mm λ/10 3 arcsec 41.- Request MetricEnglish Add to cart
220-0203 25 mm 25,4 mm BK7 6 mm λ/10 3 arcsec 76.- In stock MetricEnglish Add to cart
220-0293 25 mm 25,4 mm BK7 10 mm λ/10 3 arcsec 68.- Request MetricEnglish Add to cart
220-0403 40 mm 38,1 mm BK7 10 mm λ/10 3 arcsec 98.- Request MetricEnglish Add to cart
220-0503 50 mm 50,8 mm BK7 12 mm λ/10 3 arcsec 131.- Request MetricEnglish Add to cart
220-0106 12,5 mm 12,7 mm BK7 3 mm λ/4 1 arcmin 21.- Request MetricEnglish Add to cart
220-0166 12,5 mm 12,7 mm BK7 6 mm λ/4 1 arcmin 19.- Request MetricEnglish Add to cart
220-0236 25 mm 25,4 mm BK7 3 mm λ/4 1 arcmin 25.- In stock MetricEnglish Add to cart
220-0206 25 mm 25,4 mm BK7 6 mm λ/4 1 arcmin 24.- Request MetricEnglish Add to cart
220-0466 40 mm 38,1 mm BK7 6 mm λ/4 1 arcmin 42.- Request MetricEnglish Add to cart
220-0406 40 mm 38,1 mm BK7 8 mm λ/4 1 arcmin 41.- Request MetricEnglish Add to cart
220-0566 50 mm 50,8 mm BK7 6 mm λ/4 1 arcmin 61.- Request MetricEnglish Add to cart
220-0586 50 mm 50,8 mm BK7 8 mm λ/4 1 arcmin 57.- Request MetricEnglish Add to cart
220-0786 75 mm 76,2 mm BK7 8 mm λ/4 1 arcmin 160.- Request MetricEnglish Add to cart
220-0726 75 mm 76,2 mm BK7 12,7 mm λ/4 1 arcmin 149.- Request MetricEnglish Add to cart

Material - UV FS
Code Diameter - Metric Diameter - English Material Thickness T Flatness Parallelism Item price, USD In stock Choose diameter Add to cart
220-1101 12,5 mm 12,7 mm UV FS 3 mm λ/10 30 arcsec 58.- Request MetricEnglish Add to cart
220-1161 12,5 mm 12,7 mm UV FS 6 mm λ/10 30 arcsec 55.- In stock MetricEnglish Add to cart
220-1191 20 mm 20 mm UV FS 3 mm λ/10 30 arcsec 76.- In stock MetricEnglish Add to cart
220-1211 20 mm 20 mm UV FS 5 mm λ/10 30 arcsec 69.- In stock MetricEnglish Add to cart
220-1231 25 mm 25,4 mm UV FS 3 mm λ/10 30 arcsec 96.- Request MetricEnglish Add to cart
220-1201 25 mm 25,4 mm UV FS 6 mm λ/10 30 arcsec 87.- Request MetricEnglish Add to cart
220-1462 40 mm 38,1 mm UV FS 6 mm λ/10 30 arcsec 148.- Request MetricEnglish Add to cart
220-1402 40 mm 38,1 mm UV FS 8 mm λ/10 30 arcsec 134.- Request MetricEnglish Add to cart
220-1562 50 mm 50,8 mm UV FS 6 mm λ/10 30 arcsec 214.- In stock MetricEnglish Add to cart
220-1582 50 mm 50,8 mm UV FS 8 mm λ/10 30 arcsec 194.- Request MetricEnglish Add to cart
220-1502 50 mm 50,8 mm UV FS 10 mm λ/10 30 arcsec 176.- Request MetricEnglish Add to cart
220-1722 75 mm 76,2 mm UV FS 12,7 mm λ/10 30 arcsec 254.- Request MetricEnglish Add to cart
220-1752 75 mm 76,2 mm UV FS 15 mm λ/10 30 arcsec 231.- Request MetricEnglish Add to cart
220-1103 12,5 mm 12,7 mm UV FS 3 mm λ/10 3 arcsec 68.- Request MetricEnglish Add to cart
220-1163 12,5 mm 12,7 mm UV FS 6 mm λ/10 3 arcsec 62.- Request MetricEnglish Add to cart
220-1193 12,5 mm 12,7 mm UV FS 10 mm λ/10 3 arcsec 55.- Request MetricEnglish Add to cart
220-1203 25 mm 25,4 mm UV FS 6 mm λ/10 3 arcsec 104.- Request MetricEnglish Add to cart
220-1293 25 mm 25,4 mm UV FS 10 mm λ/10 3 arcsec 93.- Request MetricEnglish Add to cart
220-1403 40 mm 38,1 mm UV FS 10 mm λ/10 3 arcsec 153.- Request MetricEnglish Add to cart
220-1503 50 mm 50,8 mm UV FS 12 mm λ/10 3 arcsec 204.- Request MetricEnglish Add to cart
220-1106 12,5 mm 12,7 mm UV FS 3 mm λ/4 1 arcmin 38.- Request MetricEnglish Add to cart
220-1166 12,5 mm 12,7 mm UV FS 6 mm λ/4 1 arcmin 34.- Request MetricEnglish Add to cart
220-1236 25 mm 25,4 mm UV FS 3 mm λ/4 1 arcmin 55.- Request MetricEnglish Add to cart
220-1206 25 mm 25,4 mm UV FS 6 mm λ/4 1 arcmin 54.- Request MetricEnglish Add to cart
220-1466 40 mm 38,1 mm UV FS 6 mm λ/4 1 arcmin 99.- Request MetricEnglish Add to cart
220-1406 40 mm 38,1 mm UV FS 8 mm λ/4 1 arcmin 98.- Request MetricEnglish Add to cart
220-1566 50 mm 50,8 mm UV FS 6 mm λ/4 1 arcmin 144.- Request MetricEnglish Add to cart
220-1586 50 mm 50,8 mm UV FS 8 mm λ/4 1 arcmin 141.- Request MetricEnglish Add to cart
220-1786 75 mm 76,2 mm UV FS 8 mm λ/4 1 arcmin 218.- Request MetricEnglish Add to cart
220-1726 75 mm 76,2 mm UV FS 12,7 mm λ/4 1 arcmin 198.- Request MetricEnglish Add to cart

Material - FS
Code Diameter - Metric Diameter - English Material Thickness T Flatness Parallelism Item price, USD In stock Choose diameter Add to cart
220-3101 12,5 mm 12,7 mm FS 3 mm λ/10 30 arcsec 56.- Request MetricEnglish Add to cart
220-3161 12,5 mm 12,7 mm FS 6 mm λ/10 30 arcsec 53.- Request MetricEnglish Add to cart
220-3191 20 mm 20 mm FS 3 mm λ/10 30 arcsec 71.- Request MetricEnglish Add to cart
220-3211 20 mm 20 mm FS 5 mm λ/10 30 arcsec 65.- Request MetricEnglish Add to cart
220-3231 25 mm 25,4 mm FS 3 mm λ/10 30 arcsec 89.- Request MetricEnglish Add to cart
220-3201 25 mm 25,4 mm FS 6 mm λ/10 30 arcsec 82.- Request MetricEnglish Add to cart
220-3462 40 mm 38,1 mm FS 6 mm λ/10 30 arcsec 132.- Request MetricEnglish Add to cart
220-3402 40 mm 38,1 mm FS 8 mm λ/10 30 arcsec 120.- Request MetricEnglish Add to cart
220-3562 50 mm 50,8 mm FS 6 mm λ/10 30 arcsec 173.- Request MetricEnglish Add to cart
220-3582 50 mm 50,8 mm FS 8 mm λ/10 30 arcsec 157.- Request MetricEnglish Add to cart
220-3502 50 mm 50,8 mm FS 10 mm λ/10 30 arcsec 143.- Request MetricEnglish Add to cart
220-3722 75 mm 76,2 mm FS 12,7 mm λ/10 30 arcsec 237.- Request MetricEnglish Add to cart
220-3752 75 mm 76,2 mm FS 15 mm λ/10 30 arcsec 215.- Request MetricEnglish Add to cart
220-3103 12,5 mm 12,7 mm FS 3 mm λ/10 3 arcsec 64.- Request MetricEnglish Add to cart
220-3163 12,5 mm 12,7 mm FS 6 mm λ/10 3 arcsec 57.- Request MetricEnglish Add to cart
220-3193 12,5 mm 12,7 mm FS 10 mm λ/10 3 arcsec 51.- Request MetricEnglish Add to cart
220-3203 25 mm 25,4 mm FS 6 mm λ/10 3 arcsec 100.- Request MetricEnglish Add to cart
220-3293 25 mm 25,4 mm FS 10 mm λ/10 3 arcsec 89.- Request MetricEnglish Add to cart
220-3403 40 mm 38,1 mm FS 10 mm λ/10 3 arcsec 138.- Request MetricEnglish Add to cart
220-3503 50 mm 50,8 mm FS 12 mm λ/10 3 arcsec 172.- Request MetricEnglish Add to cart
220-3106 12,5 mm 12,7 mm FS 3 mm λ/4 1 arcmin 35.- Request MetricEnglish Add to cart
220-3166 12,5 mm 12,7 mm FS 6 mm λ/4 1 arcmin 32.- Request MetricEnglish Add to cart
220-3236 25 mm 25,4 mm FS 3 mm λ/4 1 arcmin 52.- Request MetricEnglish Add to cart
220-3206 25 mm 25,4 mm FS 6 mm λ/4 1 arcmin 51.- Request MetricEnglish Add to cart
220-3466 40 mm 38,1 mm FS 6 mm λ/4 1 arcmin 94.- Request MetricEnglish Add to cart
220-3406 40 mm 38,1 mm FS 8 mm λ/4 1 arcmin 93.- Request MetricEnglish Add to cart
220-3566 50 mm 50,8 mm FS 6 mm λ/4 1 arcmin 133.- Request MetricEnglish Add to cart
220-3586 50 mm 50,8 mm FS 8 mm λ/4 1 arcmin 129.- Request MetricEnglish Add to cart
220-3786 75 mm 76,2 mm FS 8 mm λ/4 1 arcmin 200.- Request MetricEnglish Add to cart
220-3726 75 mm 76,2 mm FS 12,7 mm λ/4 1 arcmin 182.- Request MetricEnglish Add to cart
For metric dimensions please add to catalogue number code M, for English – code E.

All prices are FCA Vilnius.
Prices are valid only for direct orders. For orders via distributors contact them directly.
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