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# [Optical Terminology](https://www.pfgoptics.com/blog/optical-terminology)

Optical Terms Angle of Incidence Diameter Tolerances Extinction Ratio Reflectivity Transmittance Surface Quality Surface Flatness Surface Roughness Angle of Incidence The angle of incidence is ...

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# All articles from PFG Optics

#### [Blog • Aug 1, 2021 Optical Terminology](https://www.pfgoptics.com/blog/optical-terminology)

[Read article](https://www.pfgoptics.com/blog/optical-terminology)

#### [News • Aug 1, 2021 PFG Optics Featured Presenter about Thin Film Coatings](https://www.pfgoptics.com/blog/pfg-optics-thin-film-coatings-presentation)

[Read article](https://www.pfgoptics.com/blog/pfg-optics-thin-film-coatings-presentation)

#### [News • Jul 31, 2021 Photonics West 2021 – An In-Person Conference by SPIE](https://www.pfgoptics.com/blog/photonics-west-2021-pfg-optics-plans-to-attend)

[Read article](https://www.pfgoptics.com/blog/photonics-west-2021-pfg-optics-plans-to-attend)

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