Microlenses

Microlenses By Vincent Bockaert To overcome the limitations of a low fill factor, ...

Well-designed microlenses can improve the photon signal at each photosite, and subsequently create images which have less noise for the same exposure time.

As shown in the illustration (Fig. 2) of the image sensor cross-section, the sensor surface is equipped with microlenses, with a small gap between them.

Leica also designed the microlenses (lenses that direct light to the sensor) in such a way that the lenses become more offset towards the edges to match the angle of the light hitting the sensor.

They've also improved their microlens fabrication to reduce the gap between microlenses by a factor of two over their earlier designs (each pixel has a very tiny lens to gather light and focus it on the very small pixel pad that is sensitive to ...

"Purple Fringing" and Microlenses (Vincent Bockaert, DPReview.com) Sony 828 Purple Fringe Analysis (Tom Fiddaman) Removing Purple Fringing (Scott Mendham, PC World Australia, 29 January 2004) ...

The bottom layer contains the photosites. Above them is a layer of colored filters that determines which color each site records. Finally, the top layer contains microlenses that gather light. Courtesy of Fujifilm.

See also: Lenses, Camera, Image, Light, Digital