ABSTRACT
The optics used in a DSC lens are the same as those used for fi lm cameras. However, the silicon used in the image sensor is sensitive to energy in the infrared region of the electromagnetic spectrum. Therefore, the addition of an infrared blocking fi lter in front of the image sensor is necessary to block energy in this part of the spectrum. Additionally, an optical low-pass fi lter is also placed in front of the image sensor to prevent moiré patterns or aliasing in the image.
