Making the smallest Nipkow NBTV, THE NIPKOW NIPPER.
Posted: Fri Nov 11, 2011 1:02 am
Further to the other thread about small Nipkows.
I have got the tiny bug......
I am making a jig to hold my old Ensign Selfix 120 rollfilm camera (104mm lens), together with the club's Nipkow disk on the same rig, mounted approx 2 feet from the camera to get my 2 inch dia Nipkow disk image on film. This image cut out to form a 2 inch dia Nipkow disk, to be sandwiched betwee 2 large washers for film stability.
The film is Fujichrome reversal. 12 shots on one film to give various exposures for best results.
Also going to use a piece of frosted material positioned where the Ensign Selfix's camera's 120 film runs to examine the camera's image of the Nipkow disc to get the camera focus correct. (Close up lenses required.)
Just recapping, the club's Nipkow disk's image on 120 film will be 2 inches diameter, so the NBTV picture will be approx .2 inches x .120 inches. from this spinning disk.
The resulting Nipkow scanning image holes will be .004 inches dia and the sync holes about .012 inches dia. I am hoping that the opto fork will sense these tiny holes and not require a seperate larger sync wheel as I wish everything to be kept small.
A large 10mm ultra bright LED positioned right up to the spinning disc will
give enough illumination, I hope, to overcome the poor light threwput from the .004 imaged spinning holes.
The tiny camera ordered from ebay for £5 will pick up the NBTV image,
I hope !
(using an experimental close up lens) from the spinning film and show it on one of those car reversing LCD displays.(about 3 inches high. ) so one can see the tiny image on the spinning film just above the big LCD display.
Will it all work? Any suggestions please?
I have got the tiny bug......
I am making a jig to hold my old Ensign Selfix 120 rollfilm camera (104mm lens), together with the club's Nipkow disk on the same rig, mounted approx 2 feet from the camera to get my 2 inch dia Nipkow disk image on film. This image cut out to form a 2 inch dia Nipkow disk, to be sandwiched betwee 2 large washers for film stability.
The film is Fujichrome reversal. 12 shots on one film to give various exposures for best results.
Also going to use a piece of frosted material positioned where the Ensign Selfix's camera's 120 film runs to examine the camera's image of the Nipkow disc to get the camera focus correct. (Close up lenses required.)
Just recapping, the club's Nipkow disk's image on 120 film will be 2 inches diameter, so the NBTV picture will be approx .2 inches x .120 inches. from this spinning disk.
The resulting Nipkow scanning image holes will be .004 inches dia and the sync holes about .012 inches dia. I am hoping that the opto fork will sense these tiny holes and not require a seperate larger sync wheel as I wish everything to be kept small.
A large 10mm ultra bright LED positioned right up to the spinning disc will
give enough illumination, I hope, to overcome the poor light threwput from the .004 imaged spinning holes.
The tiny camera ordered from ebay for £5 will pick up the NBTV image,
I hope !
(using an experimental close up lens) from the spinning film and show it on one of those car reversing LCD displays.(about 3 inches high. ) so one can see the tiny image on the spinning film just above the big LCD display.
Will it all work? Any suggestions please?