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|                         DRAWING SPECIFICATIONS                              |
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| Chamfer: 0.5±0.2 x 45° along contour                                       |
|                                                                             |
| Surface A:                                                                  |
|   5                                                                         |
|   0.9                                                                       |
|   Rz 0.05                                                                   |
|   3.17                                                                      |
|   4±0.1                                                                     |
|                                                                             |
| End face: Rz 0.05                                                           |
|                                                                             |
| 18.01                                                                       |
|                                                                             |
| Section S-S                                                                 |
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| TECHNICAL REQUIREMENTS:                                                     |
| 1. Exposed bubbles on surface A are not permitted.                          |
| 2. Chamfers on edges: 0.5±0.2 mm.                                          |
| 3. 9/11 GOST 3-901-85 AS with MF2 protection.                              |
| 4. Spectral range λ = 177–355 nm, reflectance not less than 85%.           |
| 5. Color tone variation at bending angles shall not exceed 0.05 mm.        |
| 6. Mobility 5 – motor grinding M28.                                        |
| 7. Mobility A – end face. Radius of tangential plane (section T-7)         |
|    Rz = 98.17±0.5 mm. Radius of luminous plane (section S-S)               |
|    Rz = 96.4±0.5 mm.                                                       |
| 8. The ratio of radii Rz/Rz shall be 1.018±0.002 to ensure sufficient     |
|    focal length.                                                           |
| 9. On mobility 5 or the non-working double pupil, apply a setting tension  |
|    mark for plane T-1.                                                     |
|10. Replace material – KDV. Surretik.                                       |
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