![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
3. Surface finishes
We successively study the effects of typical local defects and roughness on the image of a point, the image of a low-contrast test pattern, and then the image of a test pattern when a bright source, such as the sun, illuminates the pupil.
Although highly efficient, optical polishing never produces absolutely perfect surfaces. There are always a few local defects, due to the raw material, impacts, surfacing operations, as well as micro-roundness called roughness.
The study is limited to the case of defects located in the plane of the pupil of the instrument, assumed to be stigmatic.
3.1 Local faults
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference
This article is included in
Electronics
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Surface finishes
Bibliography
References
Standardization
French Standards Association (Afnor)
- Optics and optical instruments – Optical treatments – Part 1: Definitions. Classification number: S10-005. - NF ISO 9211-1 - 6-1995
- Optics and optical instruments – Drawing indications for optical elements and systems – Part 1: General. Classification number: S10-008-1. - NF ISO 10110-1 - 12-1996
- Optics and optical instruments – Drawing indications for optical elements...
Manufacturers
CILAS (Compagnie Industrielle des Lasers) http://www.cilas.com
Cybernetix http://www.cybernetix.fr
Essilor http://www.essilor.fr
GIAT Industries...
Organizations
Office national d'études et de recherches aérospatiales (Onera) http://www.onera.fr
Institut d'optique théorique et appliquée (IOTA) http://www.institutoptique.fr
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference