Compact writer optics.
We co-developed a compact laser writer with an industrial laser partner and integrated the first pilot module into our write/read (R/W) prototype. The module was aligned and verified to produce two target patterns—2×3 and 2×4 QR-code arrays—with single-shot features of 500 nm. To support larger write areas and better uniformity, a new in-house DMD illumination system is being built.
Media Handler (cartridge → chuck → cartridge).
A modular Handler was designed to move data carriers from robotic storage to the R/W unit and back. The team defined the full transfer process, set mechanical/electronic/software specifications, selected components, designed parts, and completed unit tests. A validation plan now covers each step (pick, place, flip) and the full workflow. Short videos were produced to demonstrate the intended operation. To reduce product size and cost, our control concept was updated to a single-board-computer (SBC) architecture.
Robotic storage prototype.
We worked with a storage–automation supplier to customize high-density racks (each storing over 1,100 cartridges) and added a horizontal transport unit plus updated software and I/O interfaces. A test rig was built to check alignment and tolerance to rack misalignment; alignment aids were designed to speed installation. Horizontal transport tests were prioritized and successfully completed. The gripper design entered production, and multiple racks and transport units are scheduled for delivery, followed by staged tests (gripper, installation, end-to-end flow, and longer-term software reliability).
XY-stage (precision motion).
We evaluated several stage options and selected an air-bearing planar stage with a high-performance controller. After installation on a granite base, the team optimized motion profiles, damping, accuracy, and repeatability, and performed long-duration tests. The system now achieves a stable line time of 250 ms, a significant improvement. We are introducing a lighter chuck, refining controller parameters and protection thresholds, and completing software integration (replacing stand-alone test tools) to minimize overhead.
Autofocus module.
A new autofocus concept was defined for high-frequency, closed-loop focusing during writing/reading. Specifications were set, components researched, mechanical parts designed, and unit tests completed. A validation plan is in place for system-level testing.
Main achievements.
(1) Pilot laser writer delivered, integrated, and verified at 500 nm single-shot features.
(2) Handler process and hardware/software concepts completed, with unit tests passed and validation plan ready.
(3) Robotic storage customization advanced, horizontal transport verified, and delivery/test sequence set.
(4) XY-stage commissioned to 250 ms stable line time, with a clear path to 200 ms through lighter mechanics, tuning, and full software integration.
(5) Autofocus progressed from concept to tested components, heading into integrated validation.
