1) hyper long focal length
超长焦距
2) focal length
焦距;焦长
3) ultrafocuses
超焦距
1.
A theoretical amendment and interity on the method of ultrafocuses;
超焦距对焦法的理论修正和完善
2.
This essay gives a detailed mathematical proof of the traits of the depth of the field and ultrafocuses,the factors affecting the depth of the field that is directly showed in other photographic articles.
对现有摄影文献直接给出的景深及超焦距的特点和影响景深的因素作出了详细的数学证明 ,进一步探讨了这些结论在摄影技术中的实际意义 ,使得景深理论更为充实和完
4) hyperfocal distance
超焦距
1.
The formulas of field depth and hyperfocal distance once appeared in bibilography, but the physical concept as starting point for inference of the formulas is not so clear that it is hard for the others to understand.
景深和超焦距公式曾在文献中出现过，但推导公式出发点的物理意义不明确， 难以服人。
5) Long focal
长焦距
1.
The theory of secondary spectrum which exists in long focal-wide bands optical systems is introduced in this paper and the qualifications needed to eliminate are also analyzed.
该系统结构简单、质量轻,可用于小型长焦距望远系统中。
6) long focal length
长焦距
1.
Optical and mechanical design for long focal length and wide-field optical system;
长焦距大视场光学系统的光机结构设计
2.
This dissertation aims at meeting the needs of designing long focal length space camera.
本文主要研究了长焦距三反射式望远物镜的设计。
补充资料：焦距
| 焦距 focal length 表明光学系统焦点位置的特征距离。对薄透镜而言，物方焦点至透镜光心（透镜中心，见凸透镜）的距离称物方焦距，用f表示；像方焦点至透镜光心的距离称像方焦距，用f ′表示。凸透镜的焦距为实焦距，为正值；凹透镜的焦距为虚焦距，为负值。透镜两侧介质的折射率不等时，物方焦距f与像方焦距f ′并不相等，只有当透镜两侧介质的折射率相同时，才有f＝f ′。透镜焦距与透镜材料的折射率和两个表面的曲率半径有关。通过焦点并与主光轴垂直的平面称为焦面。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条