- Product Name: Rectangular windows
- Material： BK7 grade A optical glass, UV grade fused silica or CaF7 MgF7 Sapphire
- Parallelism：See the table
- Diameter Tolerance：+0.0/-0.2 mm
- Surface Quality：20-10~80-50
- Thickness Tolerance：±0.2mm
- Wavefront Distortion：λ/10-2λper 25mm
- Clear Aperture：>80%
- Bevel：<0.25(+0.25/-0.00) mm×45°
Product overview
| No. | a(mm) | b(mm) | T(mm) | Material | Parallelism |
| SBKW 050402 | 5.0 | 4.0 | 2.0 | BK7 | l |
| SBKW101000 | 10.0 | 10.0 | 0.2 | BK7 | 1' |
| SSFW 111102 | 11.43 | 11.43 | 2.3 | SFll | 3' |
| SBKW121201 | 12.7 | 12.7 | 3.0 | BK7 | 1' |
| SBKW151502 | 15.0 | 15.0 | 2.0 | JGSl | l' |
| SBKW182406 | 18.0 | 24.0 | 6.6 | BK7 | 10" |
| SBKW201502 | 20.0 | 15.0 | 2.5 | BK7 | 30" |
| SBKW202000 | 20.0 | 20.0 | 0.4 | BK7 | 10" |
| SBKW201602 | 20.57 | 16.74 | 2.54 | JGSl | l' |
| SBKW252503 | 25.0 | 25.0 | 3.0 | BK7 | l |
| SBKW252506 | 25.0 | 25.0 | 6.7 | BaK7 | 3' |
| SBKW252507 | 25.0 | 25.0 | 7.0 | BK7 | 5' |
| SBKW252501 | 25.4 | 25.4 | 1.0 | BK7 | l |
| SBKW252503 | 25.4 | 25.4 | 3.0 | BK7 | l |
| SBKW252506 | 25.4 | 25.4 | 6.35 | BK7 | 10 |
| SBKW262601 | 26.0 | 26.0 | 1.0 | BK7 | 5' |
| SBKW301702 | 30.0 | 17.0 | 2.5 | BK7 | l |
| SBKW302002 | 30.0 | 20.0 | 2.5 | BK7 | l |
| SBKW392903 | 39.7 | 29.7 | 3.0 | F4 | l |
| SBKW412505 | 41.28 | 25.4 | 5.97 | JGSl | l |
| SBKW153212 | 15.0 | 32.0 | 12.7 | BK7 | 10" |
| SBKW502902 | 50.0 | 29.0 | 2.0 | BK7 | 10' |
| SBKW505002 | 50.0 | 50.0 | 2.0 | BK7 | l |
| SBKW505003 | 50.8 | 50.8 | 3.0 | BK7 | l |
| SBKW505006 | 50.8 | 50.8 | 6.35 | BK7 | 1' |
| SBKW602902 | 60.0 | 29.0 | 2.0 | BK7 | 10' |
| SBKW602902 | 60.0 | 29.0 | 2.0 | JGSl | 10' |
| SBKW602902 | 60.0 | 29.0 | 2.0 | BK7 | 10' |
| SBKW602902 | 60.0 | 29.0 | 2.0 | JGSl | 10' |
| SBKW832902 | 83.0 | 29.0 | 2.0 | BK7 | 10' |
| SBKW832902 | 83.0 | 29.0 | 2.0 | JGSl | 10' |
| SBKW1105020 | 110.00 | 50.0 | 20.0 | BK7 | 10" |
| SBKW835202 | 83.0 | 52.0 | 2.0 | JGSl | 10' |
| SBKW1003508 | 100.0 | 35.0 | 8.0 | BK7 | 10" |
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