ARTRAY ARTCAM-265IMX-BW-WOM, Инструкция пользователя

Страница: 9 / 23

- 9 -
6.2. Camera ’ s Functions
6.2.1. Shutter Speed
The exposure time (electronic shutter speed) of the camera can be set in 100 μ sec unit
(1 line time resolution).
The exposure time can be calculated by the following formula:
Exposure time = the setting value of the shutter speed * 100 μ sec (Setting Range: 1 ～ 32767)
When outputting all pixels (2048 x 1536), it follows:
1 line time = ( 2048 + 208 )* 1.5 * 1/74.25 [ μ sec] = 3384 * 1/74.25 [ μ sec] = 45.575 [ μ sec]
Exposure time (min) = 1 * 45.575 [ μ sec] = 45.575 [ μ sec]
Exposure time (max) = 32767 * 45.575 [ μ sec] = 1.49 [ μ sec]
When setting to ROI mode, it follows:
1 line time = (Effective horizontal 208) * 1.5 * 1/74.25 [ μ sec]
When setting to thinning-out (sub-sampling) mode, it follows:
1 line time = (2048 + 208) * 0.75 * 1/74.25 [ μ sec] = 1692 * 1/74.25 [ μ sec] = 22.787 [ μ sec]
Exposure time (min) = 1 * 22.787 [ μ sec] = 22.787 [ μ sec]
Exposure time (min) = 32767 * 22.787 [ μ sec] = 746.69 [msec]
※ If ROI or thinning setting is changed, the light time will change and the image brightness will change.
If you are using SDK, you can use the Set/GetRealExposure function to set/get the exposure time in 1
μ sec units.
※ If the frame rate does not improve despite to ROI or thinning-out transfer mode,
The exposure time setting value may be larger than effective vertical pixels.
In that case, please set exposure time to < effective vertical pixels.