BM-500
CL / BB-500
CL
- 10 -
6.
Functions and Operations
6.1.
Basic functions
The BM-500CL / BB-500CL cameras is a progressive scan camera with 5 Mega pixels monochrome
or Bayer mosaic color CCDs. The interface to the host PC is via digital Camera Link. Both models
output video as 8-, 10- or 12-bits. The color version BB-500CL outputs raw Bayer video, requiring
host based color interpolation. The camera also features several pre-processing functions (see
chapter 6.2)
An analogue iris-video signal can be used for controlling the iris of an auto-iris lens when
operating in continuous mode.
The camera has both variable partial scan (user programmable) or fixed 2/3, 1/2, 1/4 and 1/8
image height. It also features vertical binning (BM-500CL only) and decimation readout (draft)
mode for faster frame rates.
There are 2 trigger modes in addition to continuous operation. The Pre-Select and Pulse Width
trigger modes are available with a unique automatic LVAL sync or a-sync selection function.
Below the functions are described in detail below.
6.1.1.
Digital Video Output (Bit Allocation)
The 10-bit digital output is set 890 LSB as 100% video level when CCD output is 200mV.
The white clip level is set at 1023 LSB when CCD output is 230mV.
CCD out
Analogue level
Digital Out
8 bits
10 bits
12 bits
Black
Setup 3.6%, 25mV
8 LSB
32 LSB
128 LSB
200mV
700mV
222 LSB
890 LSB
3560 LSB
230mV
↑
800mV
255 LSB
1023 LSB
4095 LSB
Fig.7. Digital Output Bit Allocation ( In case of 10 bits )
