1 / 4

Daylight visibility of Laser Beam

Daylight visibility of Laser Beam. Daylight Visibility of a kHz - but µJ  – Laser Beam. Eastbourne , October 200 5. Hardware Setup. Video. Day/Night. Frame Grabber. Day/Night; 5 % of 532 nm. SensiCAM. (10 Hz & kHz; bigger FOV). ISIT-TV. Old CCD. Night only. Filter 0.3 nm.

carina
Download Presentation

Daylight visibility of Laser Beam

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Daylight visibility of Laser Beam • Daylight Visibility • of a kHz • - but µJ  – • Laser Beam Eastbourne, October 2005

  2. Hardware Setup Video Day/Night Frame Grabber Day/Night;5 % of 532 nm SensiCAM (10 Hz & kHz; bigger FOV) ISIT-TV Old CCD Night only Filter 0.3 nm 95% of 532 nm 50 cm Main Telescope C-SPAD Dichroic Mirror Eastbourne, October 2005

  3. SensiCAM - CCD • Problem: Backscatter of Single Shot TOO WEAK (400 µJ) • NOT Visible with CCD ... • Solution: Integrate Backscatter of 1000 Shots ... • But do NOT Integrate the noise between shots ! • => Increases Signal / Noise Ratio ! Laser Pulses   1000 Exposures 50 µs Exposure per Shot; Backscatter image only 1000 Shots integrated; needs 0.5 s / image @ 2 kHz Eastbourne, October 2005

  4. CCD used in Graz • Sensicam 360KF; from PCO Imaging (www.pco.de) • Camera type: Interface type: PCI-Board 525 KP (Koax Version) • Programming: via the C++ Package included with the CCD; • Allows now for: • Continuous imaging of backscatter (no mirrors switched); • Uses only about 5% of the backscatter (leakage of dichroic mirror, which separates 532 from other wavelenghts); • Also used for rough visual adjustment of beam divergence ... • Future Plans: Automatic Detection of Laser Beam Peak • Automatic Beam Centering with Remote Controlled Mirror (manually adjusted now) Eastbourne, October 2005

More Related