CCD sensor.

We used an industrial CCD camera: JAI CV M50. An image is shown in Fig. 4.9; the data are provided in Tab. 4.2.

**Figure 4.9:** Jai CV M50 camera.
$\includegraphics[scale=0.4]{ottica_jai1.ps}$

Table 4.2: Specification of Jai CV M50C camera.

Specifications	CV-M50C
Scanning system	625 lines 25 frames/s
CCD Sensor	Monochrome 1/2" Hyper HAD IT CCD
Sensing area	6.6mm $\times$ 4.8mm
Picture elements effective	752 $\times$ 582
Elements in video out	737 $\times$ 575
Cell size	8.6 $\times$ 8.3
Resolution (horizontal)	560 TV lines
Resolution (vertical)	575 TV lines
Sensitivity	0.5 lux, f1.4
Sensitivity peak wave length	500nm
Wave length range	400nm - 675nm (sensitivity 50%)
S/N ratio	56dB (AGC off, Gamma 1)
Video output	Composite VBS Signal 1.0 $V_{pp}$ , 75 $\Omega$
Gamma	0.45 - 1.0
Gain	Manual - Automatic
Scanning	2:1 interlace
Accumulation	Field - Frame
Syncronization	Internal, Xtal-generated - External HD/VD - random trigger
HD Sync input - output	4V, 75 $\Omega$
VD Sync input - output	4V, 75 $\Omega$
Trigger input	4V, 75 $\Omega$
Trigger input duration	HD interval
WEN output (write enable)	4V, 75 $\Omega$
EEN output (exposure enable)	4V, 75 $\Omega$
Pixel clock out (optional)	4V, 75 $\Omega$
Internal shutter	Off,1/100s, 1/250s, 1/500s, 1/1000s, 1/2000s, 1/4500s, 1.10000s
Trigger shutter	1/60,1/100s, 1/250s, 1/500s, 1/1000s, 1/2000s, 1/4500s, 1.10000s
Long time exposures	one field to $+\infty$ . Duration between external VD pulses.
Operating temperature	-5 $^\circ$ C to +45 $^\circ$ C
Humidity	20%-80% non-condensing
Storage temperature	-25 $^\circ$ C to +60 $^\circ$ C
Storage humidity	20%-90%
Power	12V DC $\pm$ 10% 2.5W
Lens mount	C-mount
Dimensions	40mm $\times$ 50mm $\times$ 80mm
Weight	245g

The output is a standard CCIR; since it is interlaced, an image is alwais formed by two fields acquired with a time delay of $0.04\mathrm{s}$ , although the internal shutter allows to acquire a single frame in $100\mathrm{ns}$ .

The number of pixels and their dimension determine the wavevector range the CCD can directly measure: $\left[2\times10^3\mathrm{m}^{-1},2\times10^5\mathrm{m}^{-1}\right]$ . Other wavevector ranges can be covered, by creating on image with a suitable magnification factor, but we cannot cover more than two decades.