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A traditional, front-illuminated digital camera is constructed in a fashion similar to the human eye, with a lens at the front and photodetectors at the back. This traditional orientation of the sensor places the active matrix of the digital camera image sensor—a matrix of individual picture elements—on its front surface and simplifies manufacturing.
Exmor R is a back-illuminated version of Sony's CMOS image sensor. [5] Exmor R was announced by Sony on 11 June 2008 and was the world's first mass-produced implementation of the back-illuminated sensor technology. [6] [non-primary source needed] Sony claims that Exmor R is approximately twice as sensitive as a normal front illuminated sensor.
Figure 2: [8] Working principle of a thermal laser sensor (Adapted from figure 3 with permission) As shown in Fig 2, a thermopile laser sensor consists of several thermocouples connected in series with one junction type (hot junction at temperature T 1) being exposed to an absorption area and the other junction type (cold junction at temperature T 2) being exposed to a heat sink.
A fact from Back-illuminated sensor appeared on Wikipedia's Main Page in the Did you know column on 17 June 2010 (check views).The text of the entry was as follows: Did you know... that the back-illuminated sensor improves on conventional digital camera sensors by moving wiring so it does not interfere with light entering the front of the detector?
These sensors use one of the following pixel type technologies: FSI: frontside-illuminated.The light that reaches the photosensitive area is reduced because it needs to pass through multiple metal and dielectric layers.
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Hot mirror in front of the image sensor of a DSLR. Note reddish reflection of ambient light, and teal edge of filter. A hot mirror is a specialized dielectric mirror, a dichroic filter, often employed to protect optical systems by reflecting infrared light back into a light source, while allowing visible light to pass.
An unilluminated LCD must be lit from the front. To use ambient light, the liquid crystal itself is sandwiched between a polarization filter and a reflective surface. The mirror makes the display opaque so it cannot be illuminated from the back. Most often a light source is placed around the perimeter of the LCD. Frontlights are relatively ...