First trials with new 3D-camera attached to Zeiss Cinemizer Plus
July 24, 2012
As I have announced in my last post this one is going to be on the first trials of my new 3D stereoscopic camera
module. But before we start let's first take a look on the hardware.
This is the final stage of assembly with two NedCam1 modules and one base board (the NerdConv1). You see that the boards are plugged in each other with simple 2.54mm headers/receptables and are hold in position with 12mm metallic M2.5 posts. There are 4 mouning holes available for attachment on the platform of choice. The small rubber bubbles above the camera lenses are the microphones for stereo audio. I should mention here (one of my latest experiences) that this way of microphone attachement is not the best one, because the phone cables are susceptive to the clock signal emission form the cam daughter boards. It's better to place them a little bit away form the camera sub-modules.
This is the back side of the device with rugged connectors for power supply and video/audio out signals. The FPGA-board is also plugged from this side. On the left there are 4 trimmers which will later be used to control hue, saturation and brighness equilisation of the two camera sub-modules. One nice feature of this setup is the fact, that it can be powered completely form the USB port on the FPGA-board. This is very helpful when working on the software/firmware of the FPGA.
Some technical data:
- Width: 123mm
- Height: 40mm
- Depth: 55mm (including lenses)
- Mass: 94g
- Power supply: +5V ... +18V, DC, includes reverse polarity protection via P-channel MOSFET circuit
- Current draw: 450mA (includes all attached sub-modules)
- Video output: Composite video (CVBS) in permanent side-by-side 3D format, NTSC or PAL in full SD-resolution
- Audio ouput: stereo audio (a little bit weak, could be improved with an additional line amplifier in future)
- Number of AV-channels for wireless transmission (FPV): just one channel
My first trials were so to say in wired mode - at this time I did not possess the AV-transmision gear completly, I am sitll waiting for the delivery of the AV-receiver box. So I made some rough cableing to my hard-disk TV-recorder including an NTSC-to-PAL conversion. This may seem strange, but the imager chips I use in my cameras tend to have a nicer picture in NTSC than in PAL. The latter generates black bars around the image when observed in the Cinemizer goggles, while the former completly fills out the whole image frame. Because the Cinemizer can handle both video norms I tend to use NTSC for my daily use of the camers.
The video attached (http://www.youtube.com/watch?v=8voTD9zLC8s) was taken on my terrace and recorded with the said hard-disk recorder. Then I hand to burn this recording on a transfer-DVD, read and convert it into a DV-stream on my computer and finally I made a youtube-compatible clip out of it. So the final quality of the movie is not the best one. The image is much clearer on the TV-screen and of cause in the Cinemizer display.
If you own a Cinemizer then I suggest to view the movie on iPhone/iPod using the YouTube app. If not, there still is the crossed-eye-trick at hand. In my next post I hope to show some more footage in "wireless mode".