焦距是光学系统的基本参数，定义为从光学系统的主点到焦点之间的距离，分为物方焦距、像方焦距、高斯焦距和实焦距等。它表示平行光线经系统折射后会聚到焦点的距离，用于描述光学系统的成像能力。
| 标准号 & 类别 | 标准名称 | 发布 |
|---|---|---|
| DIN 58189 E:2019-09 试验 |
Fundamental standards for optics - Determination of focal length
光学系统 |
2019-09 德国标准化学会 |
| DIN 58189:2008 试验 |
Fundamental standards for optics - Determination of focal length
|
2008-09 德国标准化学会 |
| DIN 58189:2020-04 试验 |
Fundamental standards for optics - Determination of focal length
|
2020-04 德国标准化学会 |
| DIN ISO 517 E:2008-07 规范 |
Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements
|
2008-07 德国标准化学会 |
| DIN ISO 517:2002-07 规范 |
Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements
|
2002-07 德国标准化学会 |
| DIN ISO 517:2009 规范 |
Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements (ISO 517:2008); English version of DIN ISO 517:2009-05
|
2009-05 德国标准化学会 |
| DIN ISO 517:2009-05 试验 |
Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements (ISO 517:2008)
|
2009-05 德国标准化学会 |
| GB/T 10987-2009 试验 |
Optical systems.Determination of parameters
数值孔径 |
2009-09-30 国家市场监督管理总局 |
| GB/T 9917.1-2025 规范标准 |
Photographic lenses - Part 1: Zoom lenses
|
2025-10-05 国家市场监督管理总局 |
| JB/T 13292-2017 规范 |
35mm and 70mm film projection objective lenses and objective lens holder dimensions
物镜 |
2017-11-07 行业标准-机械 |
| JB/T 13803-2020 规范 |
Digital cinema projection objective lens technical conditions
|
2020-04-16 行业标准-机械 |
| JB/T 1786-2016 规范 |
Technical specifications of 35 mm motion-picture projection lens
|
2016-10-22 行业标准-机械 |
| JB/T 1787-2017 规范 |
16mm film projection objective lens technical conditions
|
2017-11-07 行业标准-机械 |
| JB/T 8248.5-1999 试验 |
Method for measuring the focal length of camera lenses
|
1999-08-06 行业标准-机械 |
| JB/T 9426.6-2011 试验 |
Lenses for motion picture camera.Part 6:Method for determining various functions of lenses for motion picture camera
有效孔径 |
2011-12-20 行业标准-机械 |
| JIS B 7094:1997 试验标准 |
Photographic lenses -- Measurement of the focal length
|
1997-10-20 日本工业标准调查会 |
| JIS B 7217:1974 试验标准 |
Method for determining various functions of projection lenses
有效孔径 |
1974-09-01 日本工业标准调查会 |
| YY/T 1089-2007 试验 |
Electroacoustic characteristics and measurement methods of single element pulse-echo ultrasonic transducers
|
2007-01-31 行业标准-医药 |
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