9-Bit Absolute Singletrack Gray Code Rotary Encoder

Rotary Encoder for absolute angle measurement based on a 9-Bit Single Track Graycode (STGC) [1]. I used the pattern from [2]. The resolution is 1 Degree. In a Single track gray code encoder all sensor elements can sit at the same radius. The cylindircal encoder geometry allows a flat design in contrary to the more common disk-based encoders.

The device is modular. Sensor blocks can be exchanged if one wants to change the slit widths or a print went wrong. Instead of a 3d printed encoder cylinder another idea is to use a laserprinted encoder pattern on transparent foil and wrap it around the upper disk.
My expectation is that due to the higher resolution of the laserprinter higher angular resolutions with more sensors could be achieved.

The structural elements of this device consist of
1. A lower disk with a pocket for a ball bearring, 9 holes for 3mm-LED, a grove for the encoder cylinder and pockets to host 9 sensor blocks. The sensor block has openings for mounting screws and