ALIO (Allient Denver) Launches Thrusight-Theta, an Ultra-Low-Profile Rotary Stage for Next-Gen Imaging and Packaging
ALIO (Allient Denver) recently announced the launch of ThruSight-Theta, a new rotary stage engineered for tools that require uncompromised rotational precision in the thinnest possible form factor, building on the recent launch of ThruSight-Focus. Built on a unique motor architecture, ThruSight-Theta pairs cog-free torque delivery with best-in-class overall height and a class-leading through-hole, enabling backside illumination and process access without adding stack height or mechanical complexity.
At just 25 mm overall height, ThruSight-Theta reduces mass and processing height while preserving stiffness and servo bandwidth, key to clean, deterministic trajectories in fast move-and-settle applications. Its 110 mm aperture gives designers true through-axis access for optics, vision, and laser paths, absolute encoder feedback provides instant position on power-up, and 1 Nm continuous torque supports dynamic, high-duty cycles on production equipment.
“Customers kept telling us they needed rotary performance that didn’t force a taller machine or compromise the optical path,” said Mark Holcomb, Director of Product Management, ALIO (Allient Denver). “ThruSight-Theta answers with a 25 mm body, a 110 mm clear aperture, and cog-free torque that keeps trajectories accurate at speed. It’s a compact foundation for modern imaging and packaging tools.”
ThruSight-Theta was conceived as a drop-in, integration-friendly axis for OEMs building compact instruments in life and health sciences, photonics, micro-electronics, and semiconductor back-end. In digital pathology and genome sequencing, the large aperture supports bottom-side illumination and reduces optical aberrations. In silicon photonics and advanced packaging, wafer backside access simplifies microlens placement, improves coupling efficiency, and enables dense co-packaged optics. For flip-chip, bonding/de-bonding, thinning, and laser ablation, the open center shortens tool chains and enhances thermal and process access, all while maintaining deterministic rotary behavior.
“Our design goal was simple. Rotational precision without bulk, and access without compromise,” added Holcomb. “The result is a stage that unlocks new tool layouts (shorter optical paths, cleaner cable routing, and easier service) while giving control teams the smooth, cog-free torque they want for fast repeatable settling with low jitter.”
ThruSight-Theta extends the ThruSight family’s mission of enabling top-and-bottom accessibility in compact motion stacks, with more options such as the ThruSight-Z to come soon. Whether paired with open-center XY platforms or used as a standalone rotary, the stage supports “Tailored Precision” implementations across cleanroom life-science instruments, photonics assembly cells, and semiconductor packaging lines. With its combination of ultra-thin axial height, cog-free drive, absolute feedback, and high continuous torque, ThruSight-Theta equips OEMs to meet tightening performance and footprint constraints without redesigning their entire motion architecture.
For specifications, configuration options, and application guidance, contact ALIO (Allient Denver) about the ALIO product line and the new ThruSight-Theta.
Come and see the Thru-Sight-Theta at Photonics West, January 20–22, 2026 — Booth 3325.