e2v EV2S02M / EV2S05M

Table of Contents

• Overview
  • Features
  • Supported pixel formats
  • Frame rates
• Special features

Overview

The following e2v Snappy sensor models are available for the VisionSensor PV3:

Supported sensors

Sensor	Type	eFG_CAMERA_TYPE	Number of pixels	Pixel size	Optical format
EV2S02MB	Monochrome	FG_CAMERA_TYPE_1920_1080_IMAGO_VSx_EV2S02MB	1920 x 1080	2.8 µm x 2.8 µm	1/3"
EV2S02MC	Color	FG_CAMERA_TYPE_1920_1080_IMAGO_VSx_EV2S02MC
EV2S05MB	Monochrome	FG_CAMERA_TYPE_2560_1936_IMAGO_VSx_EV2S05MB	2560 x 1936		1/1.8"
EV2S05MC	Color	FG_CAMERA_TYPE_2560_1936_IMAGO_VSx_EV2S05MC

Note

The SoC's sensor interface on the VisionSensor PV3 requires at least two image buffers in the aquisition queue to avoid dropped sensor frames. A third buffer is required at the end of a frame, so that there are still remaining at least two buffers after one is given back to the user.

In order to avoid any dropped frames during startup while adding the first buffers with FG_append_image(), the sensor aquisition start is delayed until the second buffer is added. A third buffer should be added before the first frame completes.

Features

• Global Shutter with simultaneous integration and readout
• 12-bit ADC with 8 bit image readout
• Horizontal and vertical flipping
• 2x2 pixel binning
• Short integration times down to 12 µs
• Constant trigger delay of 20 µs with very low jitter
• Adjustable trigger input, edge sensitivity, trigger divider and trigger delay, see Trigger Modes.
• Line scan / multi-scan mode

Supported pixel formats

The supported pixel formats are listed below:

Supported pixel types

Sensor	eFG_PIXEL_TYPE	Output format
EV2S02MB / EV2S05MB (Monochrome)	FG_PIXEL_TYPE_Y_8	1 byte per pixel
EV2S02MC / EV2S05MC (Color)	FG_PIXEL_TYPE_Y_8	Raw bayer, 1 byte per pixel

Note

• For color sensors, the first line starts with R-G components if the Mirror option is 0.
• For color sensors, there is no support for demosaicing in hardware. But the function FG_set_gain_rgb() can still be used to adjust the gain for each color component within the raw bayer pixels.

Frame rates

The frame rate can be increased be reducing the AOI size. Some examples are listed in the following table:

Maximum frame rate examples

AOI size	EV2S02M		EV2S05M
	max. frame rate	exposure time	max. frame rate	exposure time
2560 x 1936	-	-	53 Hz	18.5 ms
1920 x 1080	115 Hz	8.6 ms	117 Hz	8.4 ms
1920 x 768	161 Hz	6.1 ms	165 Hz	6 ms
1920 x 480	256 Hz	3.8 ms	262 Hz	3.7 ms
1920 x 240	506 Hz	1.9 ms	514 Hz	1.9 ms
1920 x 32	3.2 kHz	295 µs	3.1 kHz	296 µs
1920 x 16	5.4 kHz	167 µs	5.1 kHz	170 µs
1920 x 8	8.3 kHz	103 µs	7.5 kHz	109 µs
1920 x 4	11.3 kHz	71 µs	9.8 kHz	77 µs
1920 x 2	13.8 kHz	55 µs	11.6 kHz	61 µs
1920 x 1	15.6 kHz	47 µs	12.8 kHz	53 µs
2560 x 1	-	-	10.1 kHz	70 µs

Choosing a smaller AOI height will increase the maximum frame rate significantly. This makes the sensor also suitable for line scan applications, see Line scan / multi-scan mode.

Note

• For the 2MP sensor, the frame rate only depends on the AOI height. Using the full width of the 5MP sensor slightly decreases the frame rate.
• The listed maximum exposure time settings are for free run mode only. In triggered mode or in line scan mode, the exposure time values have to be about 24 µs shorter in order to reach the frame rate.

Special features

The sensor supports the following special features.

Special features

Property name	Description	Library
Mirror	Flips the image horizontally and / or vertically 0: no flipping (default) 1: flip horizontally 2: flip vertically 3: flip horizontally and vertically (rotation by 180°) Note The order of color components for raw Bayer format depends on this setting. Use FG_get_pixel_order() to get the order after the Mirror option is configured.	≥ 1.2.6.0
Binning	Binning mode 1: no pixel binning (default) 2: 2x2 pixel binning Note The binning mode must be configured before the first buffer is allocated. The parameters for FG_set_scan_param() and FG_set_aoi() refer to the reduced image size after binning is enabled. For 2x2 binning, the pixel brightness increases by a factor of two (sum of four neighbour pixels divided by two). Color information will be lost for color sensors.	≥ 1.5.1.0
ImageMode	Controls the digital test pattern: 0: Video output 1: Enable test pattern	≥ 1.2.6.0
FrameRate	Sets the desired sensor frame rate in Hertz. This setting is only applied in free run mode. The actual frame rate may be lower if the exposure time setting is too high, or if the sensor's limit is exceeded. The lowest achievable frame rate is 16 Hz for line scan mode, else 2 Hz. 0: Use maximum frame rate ≥ 1: Desired frame rate in Hertz	≥ 1.2.7.0
ScanPeriod	Sets the desired sensor frame period in microseconds (similar to "FrameRate"). This setting is only applied in free run mode. The actual frame period may be longer if the exposure time setting is too high, or if the sensor's limit is exceeded. The longest frame period is 65 ms for line scan mode, else 524 ms. 0: Use maximum frame rate ≥ 1: Desired frame period in µs	≥ 1.2.9.0

Additional features are described in the following sections:

• Trigger Modes
• Controlling the integrated LED and exposure signal output
• LED current
• Sequencer
• Frame trigger (line scan mode)