CCD Sensor | 640 x 480 pixels (-x20a)
CCD 640 x 480 pixels (-x20a)
Details of operation
Normal mode
Fixed shutter
One trigger
Reset control
VD Sync
Input/Output signal
CCD Sensor Data
Characteristics
Color version
Gray scale version
CCD 640 x 480 pixels (-x20a)
Details of operation
The process of getting an image from the CCD sensor can be separated into three different phases.Normal mode
| No. | Description |
| 1 | 0.22us to 13.1ms; approx. 3.2us/step |
| 2 | 3.2us to 13.1ms; approx. 3.2us/step |
| 3 | Shutter time - strobe delay (when duration time is set to 0) |
Fixed shutter
When external trigger signal is POSITIVE (high active), after the trigger signal rise, exposure is start. The exposure time is set by the camera electronic shutter speed. The video output is obtained immediately after the end of fixed exposure. The strobe signal start/end can be set to shutter time.
| No. | Description |
| 1 | T1 = 1 / self frame rate [second] |
| 2 | 3.62us to 13.1ms; approx. 3.2us/step |
| 3 | 0.16us to 13.1ms; approx. 3.2us/step |
| 4 | 3.2us to 13.1ms; approx. 3.2us/step |
| 5 | Shutter time - strobe delay (when duration time is set to 0) |
One trigger
When external trigger signal is POSITIVE (high active), after the trigger signal rise, exposure is start. At the trigger signal falling edge, the internal VD signal is reset and the video data are transmitted. The trigger signal width equals the exposure time.
| No. | Description |
| 1 | T1 = 1 / self frame rate [second] |
| 2 | 3.67us to 13.1ms; approx. 3.2us/step |
| 3 | T2 = 30.13us + trigger delay |
| 4 | 0.16us to 13.1ms; approx. 3.2us/step |
| 5 | 3.2us to 13.1ms; approx. 3.2us/step |
| 6 | Shutter time - strobe delay (when duration time is set to 0) |
The following trigger modes are available:
| Mode | Description |
| Continous | Free running, no external trigger signal needed. |
| OnRisingEdge | Each rising edge of trigger signal acquires one image. |
| OnHighExpose | Each rising edge of trigger signal acquires one image, integration time corresponds to pulse width. |
- See also:
- For detailed description about the trigger modes
Reset control
"When fixed shutter"
| No. | Description |
| 1 | T1 = 1 / self frame rate [second] |
| 2 | 3.62us to 13.1ms; approx. 3.2us/step |
| 3 | 0.16us to 13.1ms; approx. 3.2us/step |
| 4 | 3.2us to 13.1ms; approx. 3.2us/step |
| 5 | 43.9us to 13.14ms; approx. 3.2us/step |
| 6 | Shutter time - strobe delay (when duration time is set to 0) |
"When one trigger"
| No. | Description |
| 1 | T1 = 1 / self frame rate [second] |
| 2 | 3.2us to 13.1ms; approx. 3.2us/step |
| 3 | T2 = 30.13us + trigger delay |
| 4 | 0.16us to 13.1ms; approx. 3.2us/step |
| 5 | 3.2us to 13.1ms; approx. 3.2us/step |
| 6 | Shutter time - strobe delay (when duration time is set to 0) |
| 7 | 45.8us to 13.14ms; approx. 3.2us/step |
Special function of reset control mode
The camera shifts to the output of a normal mode (continuous output) when trigger input signal passes about 1/3 second in the state of High. It returns to the trigger mode if trigger input signal becomes Low. However, after becoming Low trigger input, the period of 50ms becomes a trigger signal input prohibition period.
VD Sync
When external VD pulse is inputted, internal VD is reset. Exposure time is established shutter speed.
| No. | Description |
| 1 | T1 = 3.83us |
- Note:
- If the external VD of cycle which does not match the camera operation mode is input, shutter time has an error.
Input/Output signal
"Input signal"The level of the trigger signal input to the camera is as follows.
| High level | +5.0 to +24V |
| Low level | 0 to +0.3V |
| Threshold (Low -> High) | +3.7 +/- 0.5V |
| Threshold (High -> Low) | +3.3 +/- 0.5V |
"Output signal"
The level of the trigger signal output from the camera is as follows.
| High level | +5V |
| Low level | 0V |
CCD Sensor Data
Device Structure
- Interline CCD image sensor
- Image size: Diagonal 6mm (Type 1/3)
- Number of effective pixels: 656 (H) x 494 (V)
- Total number of pixels: 692 (H) x 504 (V)
- Chip size: 5.79mm (H) x 4.89mm (V)
- Unit cell size: 7.4um (H) x 7.4um (V)
- Optical black:
- Horizontal (H) direction: Front 2 pixels, rear 31 pixels
- Vertical (V) direction: Front 8 pixels, rear 2 pixels
- Number of dummy bits: Horizontal 16 Vertical 5
- Substrate material: Silicon
Characteristics
These zone definitions apply to both the color and gray version of the sensor.
Color version
Gray scale version
