This effect was pointed out by Olivier Thizy on the spectro-ml group. Each pixel in a colour camera is sensitive to a particular colour (R,G,B) and they are...
Bonjour à tous Comme pour le Lhires 3 et le Barèges nous utilisons une lampe de calibration au néon. Je suppose que pour le SA 100 , il en est de même. ...
Bonjour à tous..........Hi all Je ne comprends pas comment avec une dispersion de 5.87 A/pixel (Star Analyser spectrograph christian buil) on peut balayer...
Pierre, La dispersion donne la taille du pixel, c'est-à -dire la taille du segment en longueur d'onde sur ton capteur. Attention à ne pas confondre avec la...
Bonjour Pierre, To see the whole spectrum you need to put the SA closer to the CCD. For your camera the correct distance is 30-75mm. This will give you good...
... you ... ATK1, etc ... etc ... OK ET SI J'UTILISE UN REDUCTEUR DE FOCALE,QUELS SONT LES AVANTAGES AUTRES QUE VISUELS,CAR J'AI VU QUE C.BUIL L'UTILISAIT? ...
... you ... ATK1, etc ... etc ... Bonjour à tous....Hi all ... eos 350 D AUTREMENT DIT QUEL EST LE TYPE DE CAPTEUR...........EST CE 1/2 COMME LES MINTON 12V1...
... The 350D CCD is much bigger http://www.astrosurf.org/buil/400d/400d.htm but there is no advantage in increasing dispersion more than about 5A/pixel because...
Hi Jaques, They are optical. The are the penalties off keeping the system simple, inexpensive and easy to use. 1. The beam is not parallel through the grating ...
((1. The beam is not parallel through the grating)) if we put a transmission grating betting to lent whit parall beam is this setup can fix the problem or i do...
HiJaques, You need a lens before the grating to make the beam parallel and another after to focus the spectrum onto the camera CCD. You can put the camera at...
pencez vous qu'il est possible de mesurer la temperature d'un filament de stungten a traver un vitre dans le vide avec un SA il me semble que oui mais c'Est la...
une info suplémentaire winipedia donne ceci http://en.wikipedia.org/wiki/Color_temperature mais ca ne m'aide pas a savoir comment calibrer jacques 47"N 71"W...
ceci aussi pourrait faire l'affaire peut etre http://cfa-www.harvard.edu/HITRAN/ Software fix for temperature conversion il va falloir faire des test jacques ...
hello, i have a star analyser and i wish to buy a circular prisme with angle of 3,8 °, just fitting on the star analyser i 'm living in belgium; where can i...
Hi Dominique, I think that Thorlabs ships worldwide, see: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=147&pn=PS810 (watch wordwrap) Regards, ...
Ed had one for sale just last week, try him on Ed Harriman [EdHarriman (at) compuserve.com] I got mine from Edmunds, just google Edmund Scientific Ken ... Ed...
si j'ai un disque qui tourne a 4000 Tour par minute le disque a 5 cm de diamètre et il y a un mirroir placé a 45 degre sur le bord extérieur la lumière...
Hello Jaques, The edge of the wheel moves at 0.05*pi*4000/60) = 10.5 m/sec. The speed of light is 3x10^9m/sec The maximum wavelength shift of the reflected...
ADDITION the spectro of whit led is like this http://en.wikipedia.org/wiki/Image:White_LED.png easy to see and compared jack47'N 71'W Subject: [staranalyser]...
ok the only 5m blade is a turbine of 747 or some other like this maybe a reflexion from is ok a crazy project ok I give up thank to spend your time on my...
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