Lucky Imaging

Aloittaja jaava, 25.10.2007, 22:44:47

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jaava

Ajettilin sitten tällaisen kameran hommata: http://www.ast.cam.ac.uk/~optics/Lucky_Web_Site/index.htm

Pitäis vaan ehkä saada myös parempi teleskooppi ja siihen AO.

JV

PS. Lainaten:
"What has happened recently is that an entirely new output structure (known as low light level CCDs or L3CCDs) has been developed for CCDs by E2V Technologies (Chelmsford, UK). Similar technology electron-multiplying CCDs (EMCCDs) have been developed by Texas Instruments (Japan).  Both work by extending the output register with an additional section that is clocked with much higher voltages than usual so as to give a noiseless electron multiplication stage before the output amplifier. This signal amplification stage effectively reduces the readout noise of the on-chip amplifier by the gain factor of this multiplication register which may be set as high as many thousands. A single frame read out at high speed has essentially no readout noise with this technology. It is possible to build cameras that can see each and every individual photon detected by the CCD chip. The effect of this is that our limiting sensitivity is dramatically increased to perhaps only 30-100 detected photons from the reference star per frame, a factor of over 3000 on the above example. Lucky Imaging is therefore only possible because of this new technology which we have used in our experiments and observations."
If no Higgs particle exists, we have a revolution in our hands.

Kuulapaa

Vähän aihealuetta sivuten, mutta ilman kuvien valikointia; virittelin vanhan Konica AR sopivan filmitokinan 80-200/2.8 kiinni QHY163M-kameraan ja vain tavalliselle kolmijalalle. Sillä sitten ilman mitään filttereitä sekunnin valotuksia 1000kpl.


1 sekunnin valotus


1000 kpl niitä pinossa

Tuossa on vain ongelmana, ettei väliin mahdu IR-cut filtteriä ja seuraavana hommana on virittää se sinne väliin. Jotenkin tähän tapaan mutta ohuemmin:
Kun itse tekee niin saa sellaisen kun tulee.
http://www.kuulapaa.com/