![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
4. Controlling defects of short spatial duration. Laser beam profilometry
Other optical techniques derived from autocollimation have been developed in the laboratory to test, with optimum sensitivity, the straightness of optical surfaces up to several tens of centimetres in diameter, but with spatial periods which, without entering the realm of roughness, are more in the realm of what we have called undulations. Some geometrical optics fixtures give excellent results in this field.
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
Friction, wear and lubrication
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
Controlling defects of short spatial duration. Laser beam profilometry
References
Standardization
The Afnor catalog can be consulted online: http://www.afnor.fr
- Spécification géométrique des produits (GPS) - État de surface : méthode du profil - Caractéristiques métrologiques des filtres à phase correcte. - NF EN ISO 11562 - Mars 1998
- Spécification géométrique des produits (GPS) - État de surface : méthode du profil - Paramètres...
Manufacturers
(non-exhaustive list)
ADE Phase Shift http://www.phase-shift.com
EXFO Burleigh http://www.exfo.com
FEI Company http://www.feicompany.com
...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