@ -83,7 +83,7 @@ Fig. 2b. here the image points are virtual.
\- *converges* into a new point in space $\Longrightarrow$ *concentration of light energy* at this point.
\- *converges* into a new point in space $\Longrightarrow$ *concentration of light energy* at this point.
\- *diverges* from on other new point in space $\Longrightarrow$ *no concentration of light energy* at this point.
\- *diverges* from on other new point in space $\Longrightarrow$ *no concentration of light energy* at this point.
**Optical imager** :
**Optical imager** :
* create a **true three dimensional***image* of the extended object surface oriented towards the imager.
* create a **true three dimensional***image* of the extended object surface oriented towards the imager.
* use **refraction and/or reflection** phenomena.
* use **refraction and/or reflection** phenomena.
<!-- In main or beyond, talk about this, in a comment. Term "optical", contradiction. "visible?" or "refraction/reflexion use?". Holographic image work in the visible range too, but is based on diffraction pehnomenon.
<!-- In main or beyond, talk about this, in a comment. Term "optical", contradiction. "visible?" or "refraction/reflexion use?". Holographic image work in the visible range too, but is based on diffraction pehnomenon.