CMV2000 datasheet(52/87 Pages) AMSOSRAM

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CMV2000

Functional description

Datasheet

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Table 14: Mono or color register selection

Default value

Description of the value

mono

39[0]

0: Color sensor is used

1: Monochrome sensor is used

7.4.2.2

Piecewise linear response

The CMV2000 has the possibility to achieve a high optical dynamic range by using a piecewise

linear response. This will clip illuminated pixels which reach a programmable voltage, while

leaving the darker pixels untouched. The clipping level can be adjusted 2 times within one

exposure time to achieve a maximum of 3 slopes in the response curve, as shown in

Figure 47.

Figure 47: Piecewise linear response details

In Figure 47, the red lines represent a pixel on which a large amount of light is falling. The blue

line represents a pixel on which less light is falling. The bright pixel is held to a programmable

voltage for a programmable time during the exposure time. This happens two times to make

sure that at the end of the exposure time the pixel is not saturated. The darker pixel is not

influenced and will have a normal response. The Vlow voltages and different exposure times

are programmable using the sequencer registers. Using this feature, a response as detailed in

Figure 48 can be achieved.

Vhigh

Vlow3

Vlow2

Vlow1

Total exposure time

Exposure kneepoint 2

Pixel reset

Pixel sample

Exposure kneepoint 1

CMV2000 데이터시트(PDF) 52 Page - ams-OSRAM AG