Invertors are designed for exit screens of Image Intensifier tubes used in Night Vision Devices production process.
| overall dimensions | calculated numerical aperture | temperature coefficient of linear expansion (temperature range 20-300 oC) | transmission coefficient in defused light into zone | angle of deflection | resolving power | unit weight |
| mm | - | oC-1 | - | degree | mm-1 | - |
| D21x25 | 1.04 | 73±3 | D=5 mm >= 0.45 D=15 mm >= 0.38 | 180±2 | >=45 | 3.47 |
pricing: 7 USD per gram of usable item at unit weight 3.8 g/cm3 for vacuum-tight items, 4 USD per 1 gram for vacuum-untight items.