FROG measurement using new CCD camera

We used the new FLI back illuminated CCD to take the FROG picture. I found this new CCD camera very sensitive to the UV light compared with our old CCD. For the old one, we had to expose about 5 seconds to take Hg I 248 nm line, for this new one, it's only about 30 ms.

When we were taking the FROG images, the signal was very strong. I had to use a ND filter (~0.005 transimission) to attenuate the light. The retrieved data is almost match the raw data. But for the old CCD camera, it's not well to match these data.

MaxCam CM 1-1

In order to measure the UV beam effctively, we bought a low cost, high QE, back-thinned CCD camera from Fingre Lakes Instrumentation.

Camera Serial Number: 2357 04 Sensor Type: Class 1 / 512 x 512 / 24um pixels E2V CCD 77-01-1-390 Lab Ambient Temperature: 23 C Setup measurement Temperature sensor ok: checked Shutter opens fully: checked Shutter closes fully: checked Window clean on both surfaces: checked CCD free of dust: checked Purging 0.2 torr rise time > 90 seconds: checked Fresh desiccant: checked Argon filled: checked Mechanical/Cosmetics No scratches or marks on Case: checked Shutter test properly: checked Serial number label is present: checked

Image Quality CCD test temperature: -15 C Camera achieves T greater than: 37 C Mean bias level of bias frame: 2367 Standard deviation @ test temp, small area: 3.3 Mean saturation level: 65535 Noise distribution is random: checked Bias frame histogram is Gaussian: checked Standard test target appearance ok: checked Bias over scan frame saved as 2357 04 bias OS -15C. fts Light frame saved as: 2357 04 lgt -15C.fts Flat field frame saved as: 2357 04 ff -15C.fts Software A/D serial Number: #3329 Final Check, no frost visible@ -15 C Tested by: Dave Johnson October 13, 2006