BS 4779:1971
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Recommendations for measurement of the optical transfer function of optical devices
Hardcopy , PDF
07-26-2021
English
11-10-1971
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Cooperating organizations
Foreword
Recommendations
1. Scope
2. Definitions
3. General requirements
4. Detailed equipment requirements
5. Specification of measurement conditions
6. Points requiring special attention during OTF
measurements
7. Presentation of results
8. Test on OTF equipment
Table
1. Bench error delta z giving rise to a change of 0.05
in MTF for an aberration-free lens
Figures
1. Definition of phase and modulation
2. Nodal slide type bench
3. Camera type bench
4. Sign convention for field direction and lens
orientation
5. delta z error of an optical bench
6. Presentation of results
7. Slit-width correction factors: single slit, width
of 1 mu m
8. Slit-width correction factors: crossed slits of
equal width
Adopts OTF measurement as an objective test method for ascertaining and expressing the performance of optical devices and systems, including image forming systems or assemblies and lenses but does not normally relate to the separate parts of a multi-component system. Specifically limited to tests on lens or mirror image-forming systems or combinations of both. Methods considered employ localized apertures such as slits or edges, or an extended periodic screen such as a grating. Guidance for operation of OTF measuring equipment is also given.
| Committee |
CPW/172
|
| DevelopmentNote |
Supersedes 70/27006 DC. (07/2005) Reviewed and confirmed by BSI, December 2011. (11/2011)
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
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