
| Optical Thickness: | 3mm ±0.5mm |
| Mechanical Thickness: | Add 0.8mm for ring mount |
| Size Tolerance: | +0.00/-0.25mm |
| Surface Quality: | 80/50 per MIL-M-13508 |
| Max. Operating Temperature: | +100°C |
| Transmitted Wavefront (TWF): | 1/4 wave per inch |
| Parallelism: | 30 arc seconds or better |
| Spectral Data: | Stated as internal transmittance |
| Mechanical: | Mounted, except for squares |
? Fabricated from high-quality optical filter glass
? Both surfaces precision polished
? Options span ultraviolet to infrared region

| DESCRIPTION | PART NO. |
| UG-1 Filter Glass, 165mm x 165mm x 3mm | 001FG09-165S |
| UG-1 Filter Glass, 25mm diameter | 001FG09-25 |
| UG-1 Filter Glass, 50mm diameter | 001FG09-50 |
| UG-1 Filter Glass, 50mm x 50mm x 3mm | 001FG09-50S |
| UV Filter Glass, 165mm x 165mm x 3mm | 005FG09-165S |
| UV Filter Glass, 25mm diameter | 005FG09-25 |
| UV Filter Glass, 50mm diameter | 005FG09-50 |
| UV Filter Glass, 50mm x 50mm x 3mm | 005FG09-50S |
| UV Filter Glass, 165mm x 165mm x 3mm | 011FG09-165S |
| UV Filter Glass, 25mm diameter | 011FG09-25 |
| UV Filter Glass, 50mm diameter | 011FG09-50 |
| UV Filter Glass, 50mm x 50mm x 3mm | 011FG09-50S |
| Blue Filter Glass, 165mm x 165mm x 3mm (BG-23 or equivalent) | 023FG11-165S |
| Blue Filter Glass, 25mm diameter (BG-23 or equivalent) | 023FG11-25 |
| Blue Filter Glass, 50mm diameter (BG-23 or equivalent) | 023FG11-50 |
| Blue Filter Glass, 50mm x 50mm x 3mm (BG-23 or equivalent) | 023FG11-50S |
| BG-25 Filter Glass, 165mm x 165mm x 3mm | 025FG11-165S |
| BG-25 Filter Glass, 25mm diameter | 025FG11-25 |
| BG-25 Filter Glass, 50mm diameter | 025FG11-50 |
| BG-25 Filter Glass, 50mm x 50mm x 3mm | 025FG11-50S |
| BG-40 Filter Glass, 165mm x 165mm x 3mm | 040FG11-165S |
| BG-40 Filter Glass, 25mm diameter | 040FG11-25 |
| BG-40 Filter Glass, 50mm diameter | 040FG11-50 |
| BG-40 Filter Glass, 50mm x 50mm x 3mm | 040FG11-50S |
| S-8612 Filter Glass, 165mm square | S86FG11-165S |
| S-8612 Filter Glass, 25mm diameter | S86FG11-25 |
| S-8612 Filter Glass, 50mm diameter | S86FG11-50 |
| S-8612 Filter Glass, 50mm square | S86FG11-50S |