expansion_objectives
Table of Contents
Expansion Objectives
History
Applied Scientific Instrumentation (ASI) worked with Special Optics to develop dipping objective lenses for expansion samples, building on a collaboration begun with multi-immersion objectives. The key feature of the expansion objectives includs a very long WD while keep decent NA and large FOV. Unlike alternatives, it is specifically optimized for light sheet with flat field of view and good chromatic performance. We also minimized the profile of the mechanical tip given the NA/FOV. The first objective will be available around September 2026, and other designs are expected to follow.
ASI is the sole distributor of these objectives but will sell them freely to anyone interested, including home builders and companies.
57-15-8 Specifications
| Specification | Value | Comments |
|---|---|---|
| Numerical Aperture | 1.0 | water dipping, not multi-immersion |
| Effective Focal Length | 7.49 mm | 26.7x with 200 mm TL, 24x with 180 mm TL |
| Working Distance | 5.45 mm | |
| Field of View | 1.1 mm Ø | diffraction-limited, slightly larger for some wavelengths |
| Corrections | plan apo | optimized for 500 – 750 nm |
| Transmission | ~85% | Internal coatings 400 – 1300 nm |
| Parfocal length | 83 mm | |
| Threads | M32x0.75 | |
| Mechanical Angle | 53.1° / 48° | measured from center of FOV to limiting point / slope of body |
| Notes | will barely co-focus with the 54-12-8 without collision |
57-15-8 Materials
- drawing coming soon
Address: 29391 W Enid Rd. Eugene, OR 97402, USA | Phone: +1 (541) 461-8181
expansion_objectives.txt · Last modified: 2026/06/09 18:01 by jon