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Thu, 20 Dec 2007
new lenses, new combo radio/motor-control board
We just received a shipment of add-on lenses for the SRV-1 Blackfin Camera Board. The standard lens has a 6.5mm focal length with f3.2 aperture and approx 60-degree field of view. The new lenses are wide angle - one is a 3.6mm focal length with f2.0 aperture and approx 90-degree field of view, and the other is a fish-eye with 2.2mm focal length, f2.5 aperture, and approx 120-degree field of view.
We are going to offer the 3.6mm and 2.2mm lenses as an add-on option with the camera boards and robot for $29 for the lens pair - this will be added to the shopping cart in the next 1-2 days.
Here are some images captured by the robot from the same position, in order of 6.5mm, 3.6mm and 2.2mm. Note some reflection in the pictures because they are shot through a window, and there's not much light. The 2.2mm has a lot of fish-eye distortion, but a nice wide field of view. The 3.6mm has some fish-eye, but isn't too noticeable except with close objects. The 6.5mm is pretty linear.
Also, I wanted to mention that we have a new board that combines the Matchport WLAN radio with the motor control and laser driver circuit. By combining these functions into a single board, we reduce the robot height be 9/16" (15mm) and simplify the assembly. The new board won't have the back-emf circuit, but it will add support for the 2nd Matchport UART, and we're looking at alternative (more accurate) speed measurement approach using optical flow. We will probably start to switch production over to these new boards in 2-3 weeks. The motor control board with back-emf will still be available as an option, but the standard configuration will ship with the combo board.
Here are some photos of the combo board setup -
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