Optically observing instrument and method |
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| 申请号 | JP5970877 | 申请日 | 1977-05-23 | 公开(公告)号 | JPS52143852A | 公开(公告)日 | 1977-11-30 |
| 申请人 | Eitel Richard P; | 发明人 | RICHIYAADO PII AITERU; | ||||
| 摘要 | A see-through zone is provided of a shape and size so that the horizontal end portions of the zone will merge as an image defining a target frame into which the user can center a stationary or moving target by keeping his line of sight properly on the target. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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